yacy_search_server/source/de/anomic/plasma/plasmaSwitchboard.java

// plasmaSwitchboard.java
// (C) 2004-2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 2004 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// LICENSE
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

/*
   This class holds the run-time environment of the plasma
   Search Engine. It's data forms a blackboard which can be used
   to organize running jobs around the indexing algorithm.
   The blackboard consist of the following entities:
   - storage: one plasmaStore object with the url-based database
   - configuration: initialized by properties once, then by external functions
   - job queues: for parsing, condensing, indexing
   - black/blue/whitelists: controls input and output to the index
 
   this class is also the core of the http crawling.
   There are some items that need to be respected when crawling the web:
   1) respect robots.txt
   2) do not access one domain too frequently, wait between accesses
   3) remember crawled URL's and do not access again too early
   4) priorization of specific links should be possible (hot-lists)
   5) attributes for crawling (depth, filters, hot/black-lists, priority)
   6) different crawling jobs with different attributes ('Orders') simultanoulsy
 
   We implement some specific tasks and use different database to archieve these goals:
   - a database 'crawlerDisallow.db' contains all url's that shall not be crawled
   - a database 'crawlerDomain.db' holds all domains and access times, where we loaded the disallow tables
     this table contains the following entities:
     <flag: robotes exist/not exist, last access of robots.txt, last access of domain (for access scheduling)>
   - four databases for scheduled access: crawlerScheduledHotText.db, crawlerScheduledColdText.db,
     crawlerScheduledHotMedia.db and crawlerScheduledColdMedia.db
   - two stacks for new URLS: newText.stack and newMedia.stack
   - two databases for URL double-check: knownText.db and knownMedia.db
   - one database with crawling orders: crawlerOrders.db
 
   The Information flow of a single URL that is crawled is as follows:
   - a html file is loaded from a specific URL within the module httpdProxyServlet as
     a process of the proxy.
   - the file is passed to httpdProxyCache. Here it's processing is delayed until the proxy is idle.
   - The cache entry is passed on to the plasmaSwitchboard. There the URL is stored into plasmaLURL where
     the URL is stored under a specific hash. The URL's from the content are stripped off, stored in plasmaLURL
     with a 'wrong' date (the date of the URL's are not known at this time, only after fetching) and stacked with
     plasmaCrawlerTextStack. The content is read and splitted into rated words in plasmaCondenser.
     The splitted words are then integrated into the index with plasmaSearch.
   - In plasmaSearch the words are indexed by reversing the relation between URL and words: one URL points
     to many words, the words within the document at the URL. After reversing, one word points
     to many URL's, all the URL's where the word occurrs. One single word->URL-hash relation is stored in
     plasmaIndexEntry. A set of plasmaIndexEntries is a reverse word index.
     This reverse word index is stored temporarly in plasmaIndexCache.
   - In plasmaIndexCache the single plasmaIndexEntry'ies are collected and stored into a plasmaIndex - entry
     These plasmaIndex - Objects are the true reverse words indexes.
   - in plasmaIndex the plasmaIndexEntry - objects are stored in a kelondroTree; an indexed file in the file system.
 
   The information flow of a search request is as follows:
   - in httpdFileServlet the user enters a search query, which is passed to plasmaSwitchboard
   - in plasmaSwitchboard, the query is passed to plasmaSearch.
   - in plasmaSearch, the plasmaSearch.result object is generated by simultanous enumeration of
     URL hases in the reverse word indexes plasmaIndex
   - (future: the plasmaSearch.result - object is used to identify more key words for a new search)
 
 
 
 */

package de.anomic.plasma;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Constructor;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.TreeMap;
import java.util.TreeSet;

import de.anomic.data.URLLicense;
import de.anomic.data.blogBoard;
import de.anomic.data.blogBoardComments;
import de.anomic.data.bookmarksDB;
import de.anomic.data.listManager;
import de.anomic.data.messageBoard;
import de.anomic.data.userDB;
import de.anomic.data.wikiBoard;
import de.anomic.data.wiki.wikiParser;
import de.anomic.http.HttpClient;
import de.anomic.http.JakartaCommonsHttpClient;
import de.anomic.http.httpHeader;
import de.anomic.http.httpRemoteProxyConfig;
import de.anomic.http.httpd;
import de.anomic.http.httpdProxyHandler;
import de.anomic.http.httpdRobotsTxtConfig;
import de.anomic.index.indexDefaultReferenceBlacklist;
import de.anomic.index.indexReferenceBlacklist;
import de.anomic.index.indexURLReference;
import de.anomic.kelondro.kelondroBitfield;
import de.anomic.kelondro.kelondroCache;
import de.anomic.kelondro.kelondroCachedRecords;
import de.anomic.kelondro.kelondroException;
import de.anomic.kelondro.kelondroMSetTools;
import de.anomic.kelondro.kelondroMapTable;
import de.anomic.kelondro.kelondroNaturalOrder;
import de.anomic.plasma.crawler.plasmaCrawlQueues;
import de.anomic.plasma.crawler.plasmaProtocolLoader;
import de.anomic.plasma.dbImport.dbImportManager;
import de.anomic.plasma.parser.ParserException;
import de.anomic.server.serverAbstractSwitch;
import de.anomic.server.serverBusyThread;
import de.anomic.server.serverDomains;
import de.anomic.server.serverFileUtils;
import de.anomic.server.serverInstantBusyThread;
import de.anomic.server.serverMemory;
import de.anomic.server.serverObjects;
import de.anomic.server.serverProcessor;
import de.anomic.server.serverProcessorJob;
import de.anomic.server.serverProfiling;
import de.anomic.server.serverSemaphore;
import de.anomic.server.serverSwitch;
import de.anomic.server.serverThread;
import de.anomic.server.logging.serverLog;
import de.anomic.tools.crypt;
import de.anomic.tools.nxTools;
import de.anomic.yacy.yacyClient;
import de.anomic.yacy.yacyCore;
import de.anomic.yacy.yacyNewsPool;
import de.anomic.yacy.yacyNewsRecord;
import de.anomic.yacy.yacySeed;
import de.anomic.yacy.yacyURL;
import de.anomic.yacy.yacyVersion;

public final class plasmaSwitchboard extends serverAbstractSwitch<plasmaSwitchboardQueue.QueueEntry> implements serverSwitch<plasmaSwitchboardQueue.QueueEntry> {
    
    // load slots
    public static int xstackCrawlSlots      = 2000;
    
    private int       dhtTransferIndexCount = 100;    
    
    // we must distinguish the following cases: resource-load was initiated by
    // 1) global crawling: the index is extern, not here (not possible here)
    // 2) result of search queries, some indexes are here (not possible here)
    // 3) result of index transfer, some of them are here (not possible here)
    // 4) proxy-load (initiator is "------------")
    // 5) local prefetch/crawling (initiator is own seedHash)
    // 6) local fetching for global crawling (other known or unknown initiator)
    public static final int PROCESSCASE_0_UNKNOWN = 0;
    public static final int PROCESSCASE_4_PROXY_LOAD = 4;
    public static final int PROCESSCASE_5_LOCAL_CRAWLING = 5;
    public static final int PROCESSCASE_6_GLOBAL_CRAWLING = 6;
    
    // couloured list management
    public static TreeSet<String> badwords = null;
    public static TreeSet<String> blueList = null;
    public static TreeSet<String> stopwords = null;    
    public static indexReferenceBlacklist urlBlacklist;
    
    public static wikiParser wikiParser = null;
    
    // storage management
    public  File                        htCachePath;
    public  File                        plasmaPath;
    public  File                        indexPrimaryPath, indexSecondaryPath;
    public  File                        listsPath;
    public  File                        htDocsPath;
    public  File                        rankingPath;
    public  File                        workPath;
    public  File                        releasePath;
    public  HashMap<String, String>     rankingPermissions;
    public  plasmaWordIndex             wordIndex;
    public  plasmaCrawlQueues           crawlQueues;
    public  plasmaCrawlResultURLs          crawlResults;
    public  plasmaSwitchboardQueue      sbQueue;
    public  plasmaCrawlStacker          crawlStacker;
    public  messageBoard                messageDB;
    public  wikiBoard                   wikiDB;
    public  blogBoard                   blogDB;
    public  blogBoardComments           blogCommentDB;
    public  static plasmaCrawlRobotsTxt robots;
    public  plasmaCrawlProfile          profilesActiveCrawls, profilesPassiveCrawls;
    public  plasmaCrawlProfile.entry    defaultProxyProfile;
    public  plasmaCrawlProfile.entry    defaultRemoteProfile;
    public  plasmaCrawlProfile.entry    defaultTextSnippetLocalProfile, defaultTextSnippetGlobalProfile;
    public  plasmaCrawlProfile.entry    defaultMediaSnippetLocalProfile, defaultMediaSnippetGlobalProfile;
    public  boolean                     rankingOn;
    public  plasmaRankingDistribution   rankingOwnDistribution;
    public  plasmaRankingDistribution   rankingOtherDistribution;
    public  HashMap<String, Object[]>   outgoingCookies, incomingCookies;
    public  kelondroMapTable            facilityDB;
    public  plasmaParser                parser;
    public  volatile long                        proxyLastAccess, localSearchLastAccess, remoteSearchLastAccess;
    public  yacyCore                    yc;
    public  userDB                      userDB;
    public  bookmarksDB                 bookmarksDB;
    public  plasmaWebStructure          webStructure;
    public  dbImportManager             dbImportManager;
    public  plasmaDHTFlush              transferIdxThread = null;
    private plasmaDHTChunk              dhtTransferChunk = null;
    public  ArrayList<plasmaSearchQuery> localSearches; // array of search result properties as HashMaps
    public  ArrayList<plasmaSearchQuery> remoteSearches; // array of search result properties as HashMaps
    public  HashMap<String, TreeSet<Long>> localSearchTracker, remoteSearchTracker; // mappings from requesting host to a TreeSet of Long(access time)
    public  long                        lastseedcheckuptime = -1;
    public  long                        indexedPages = 0;
    public  long                        lastindexedPages = 0;
    public  double                      requestedQueries = 0d;
    public  double                      lastrequestedQueries = 0d;
    public  int                         totalPPM = 0;
    public  double                      totalQPM = 0d;
    public  TreeMap<String, String>     clusterhashes; // map of peerhash(String)/alternative-local-address as ip:port or only ip (String) or null if address in seed should be used
    public  boolean                     acceptLocalURLs, acceptGlobalURLs;
    public  URLLicense                  licensedURLs;
    public  Timer                       moreMemory;
    
    public serverProcessor<indexingQueueEntry> indexingDocumentProcessor;
    public serverProcessor<indexingQueueEntry> indexingCondensementProcessor;
    public serverProcessor<indexingQueueEntry> indexingAnalysisProcessor;
    public serverProcessor<indexingQueueEntry> indexingStorageProcessor;
    
    public httpdRobotsTxtConfig robotstxtConfig = null;
    
    
    /*
     * Some constants
     */
    public static final String STR_REMOTECRAWLTRIGGER = "REMOTECRAWLTRIGGER: REMOTE CRAWL TO PEER ";
    
    private serverSemaphore shutdownSync = new serverSemaphore(0);
    private boolean terminate = false;
    
    //private Object  crawlingPausedSync = new Object();
    //private boolean crawlingIsPaused = false;    
    
    public static final int   CRAWLJOB_SYNC = 0;
    public static final int   CRAWLJOB_STATUS = 1;
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Thread settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    // 20_dhtdistribution
    /**
     * <p><code>public static final String <strong>INDEX_DIST</strong> = "20_dhtdistribution"</code></p>
     * <p>Name of the DHT distribution thread, which selects index chunks and transfers them to other peers
     * according to the global DHT rules</p>
     */
    public static final String INDEX_DIST                   = "20_dhtdistribution";
    public static final String INDEX_DIST_METHOD_START      = "dhtTransferJob";
    public static final String INDEX_DIST_METHOD_JOBCOUNT   = null;
    public static final String INDEX_DIST_METHOD_FREEMEM    = null;
    public static final String INDEX_DIST_MEMPREREQ         = "20_dhtdistribution_memprereq";
    public static final String INDEX_DIST_IDLESLEEP         = "20_dhtdistribution_idlesleep";
    public static final String INDEX_DIST_BUSYSLEEP         = "20_dhtdistribution_busysleep";
    
    // 30_peerping
    /**
     * <p><code>public static final String <strong>PEER_PING</strong> = "30_peerping"</code></p>
     * <p>Name of the Peer Ping thread which publishes the own peer and retrieves information about other peers
     * connected to the YaCy-network</p>
     */
    public static final String PEER_PING                    = "30_peerping";
    public static final String PEER_PING_METHOD_START       = "peerPing";
    public static final String PEER_PING_METHOD_JOBCOUNT    = null;
    public static final String PEER_PING_METHOD_FREEMEM     = null;
    public static final String PEER_PING_IDLESLEEP          = "30_peerping_idlesleep";
    public static final String PEER_PING_BUSYSLEEP          = "30_peerping_busysleep";
    
    // 40_peerseedcycle
    /**
     * <p><code>public static final String <strong>SEED_UPLOAD</strong> = "40_peerseedcycle"</code></p>
     * <p>Name of the seed upload thread, providing the so-called seed-lists needed during bootstrapping</p>
     */
    public static final String SEED_UPLOAD                  = "40_peerseedcycle";
    public static final String SEED_UPLOAD_METHOD_START     = "publishSeedList";
    public static final String SEED_UPLOAD_METHOD_JOBCOUNT  = null;
    public static final String SEED_UPLOAD_METHOD_FREEMEM   = null;
    public static final String SEED_UPLOAD_IDLESLEEP        = "40_peerseedcycle_idlesleep";
    public static final String SEED_UPLOAD_BUSYSLEEP        = "40_peerseedcycle_busysleep";
    
    // 50_localcrawl
    /**
     * <p><code>public static final String <strong>CRAWLJOB_LOCAL_CRAWL</strong> = "50_localcrawl"</code></p>
     * <p>Name of the local crawler thread, popping one entry off the Local Crawl Queue, and passing it to the
     * proxy cache enqueue thread to download and further process it</p>
     * 
     * @see plasmaSwitchboard#PROXY_CACHE_ENQUEUE
     */
    public static final String CRAWLJOB_LOCAL_CRAWL                             = "50_localcrawl";
    public static final String CRAWLJOB_LOCAL_CRAWL_METHOD_START                = "coreCrawlJob";
    public static final String CRAWLJOB_LOCAL_CRAWL_METHOD_JOBCOUNT             = "coreCrawlJobSize";
    public static final String CRAWLJOB_LOCAL_CRAWL_METHOD_FREEMEM              = null;
    public static final String CRAWLJOB_LOCAL_CRAWL_IDLESLEEP                   = "50_localcrawl_idlesleep";
    public static final String CRAWLJOB_LOCAL_CRAWL_BUSYSLEEP                   = "50_localcrawl_busysleep";
    
    // 61_globalcawltrigger
    /**
     * <p><code>public static final String <strong>CRAWLJOB_REMOTE_CRAWL_LOADER</strong> = "60_remotecrawlloader"</code></p>
     * <p>Name of the remote crawl list loading thread</p>
     * 
     * @see plasmaSwitchboard#CRAWLJOB_REMOTE_CRAWL_LOADER
     */
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER                    = "60_remotecrawlloader";
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_START       = "remoteCrawlLoaderJob";
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_JOBCOUNT    = null;
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_FREEMEM     = null;
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER_IDLESLEEP          = "60_remotecrawlloader_idlesleep";
    public static final String CRAWLJOB_REMOTE_CRAWL_LOADER_BUSYSLEEP          = "60_remotecrawlloader_busysleep";
    
    // 62_remotetriggeredcrawl
    /**
     * <p><code>public static final String <strong>CRAWLJOB_REMOTE_TRIGGERED_CRAWL</strong> = "62_remotetriggeredcrawl"</code></p>
     * <p>Name of the remote triggered crawl thread, responsible for processing a remote crawl received from another peer</p>
     */
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL                  = "62_remotetriggeredcrawl";
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_START     = "remoteTriggeredCrawlJob";
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_JOBCOUNT  = "remoteTriggeredCrawlJobSize";
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_FREEMEM   = null;
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL_IDLESLEEP        = "62_remotetriggeredcrawl_idlesleep";
    public static final String CRAWLJOB_REMOTE_TRIGGERED_CRAWL_BUSYSLEEP        = "62_remotetriggeredcrawl_busysleep";
    
    // 70_cachemanager
    /**
     * <p><code>public static final String <strong>PROXY_CACHE_ENQUEUE</strong> = "70_cachemanager"</code></p>
     * <p>Name of the proxy cache enqueue thread which fetches a given website and saves the site itself as well as it's
     * HTTP-headers in the HTCACHE</p>
     * 
     * @see plasmaSwitchboard#PROXY_CACHE_PATH
     */
    public static final String PROXY_CACHE_ENQUEUE                  = "70_cachemanager";
    public static final String PROXY_CACHE_ENQUEUE_METHOD_START     = "htEntryStoreJob";
    public static final String PROXY_CACHE_ENQUEUE_METHOD_JOBCOUNT  = "htEntrySize";
    public static final String PROXY_CACHE_ENQUEUE_METHOD_FREEMEM   = null;
    public static final String PROXY_CACHE_ENQUEUE_IDLESLEEP        = "70_cachemanager_idlesleep";
    public static final String PROXY_CACHE_ENQUEUE_BUSYSLEEP        = "70_cachemanager_busysleep";
    
    
    // 74_parsing
    /**
     * <p><code>public static final String <strong>INDEXER</strong> = "80_indexing"</code></p>
     * <p>Name of the indexer thread, performing the actual indexing of a website</p>
     */
    public static final String PARSER                      = "74_indexing";
    public static final String PARSER_MEMPREREQ            = "74_indexing_memprereq";
    public static final String PARSER_IDLESLEEP            = "74_indexing_idlesleep";
    public static final String PARSER_BUSYSLEEP            = "74_indexing_busysleep";
    public static final String PARSER_METHOD_START         = "deQueueProcess";
    public static final String PARSER_METHOD_JOBCOUNT      = "queueSize";
    public static final String PARSER_METHOD_FREEMEM       = "deQueueFreeMem";
    
    
    // 80_indexing
    /**
     * <p><code>public static final String <strong>INDEXER</strong> = "80_indexing"</code></p>
     * <p>Name of the indexer thread, performing the actual indexing of a website</p>
     */
    public static final String INDEXER                      = "80_indexing";
    public static final String INDEXER_MEMPREREQ            = "80_indexing_memprereq";
    public static final String INDEXER_IDLESLEEP            = "80_indexing_idlesleep";
    public static final String INDEXER_BUSYSLEEP            = "80_indexing_busysleep";
    public static final String INDEXER_METHOD_START         = "deQueueProcess";
    public static final String INDEXER_METHOD_JOBCOUNT      = "queueSize";
    public static final String INDEXER_METHOD_FREEMEM       = "deQueueFreeMem";
    public static final String INDEXER_SLOTS                = "indexer.slots";
    
    // 82_crawlstack
    /**
     * <p><code>public static final String <strong>CRAWLSTACK</strong> = "82_crawlstack"</code></p>
     * <p>Name of the crawl stacker thread, performing several checks on new URLs to crawl, i.e. double-check</p>
     */
    public static final String CRAWLSTACK                   = "82_crawlstack";
    public static final String CRAWLSTACK_METHOD_START      = "job";
    public static final String CRAWLSTACK_METHOD_JOBCOUNT   = "size";
    public static final String CRAWLSTACK_METHOD_FREEMEM    = null;
    public static final String CRAWLSTACK_IDLESLEEP         = "82_crawlstack_idlesleep";
    public static final String CRAWLSTACK_BUSYSLEEP         = "82_crawlstack_busysleep";
    public static final String CRAWLSTACK_SLOTS             = "stacker.slots";
    
    // 90_cleanup
    /**
     * <p><code>public static final String <strong>CLEANUP</strong> = "90_cleanup"</code></p>
     * <p>The cleanup thread which is responsible for pendant cleanup-jobs, news/ranking distribution, etc.</p> 
     */
    public static final String CLEANUP                      = "90_cleanup";
    public static final String CLEANUP_METHOD_START         = "cleanupJob";
    public static final String CLEANUP_METHOD_JOBCOUNT      = "cleanupJobSize";
    public static final String CLEANUP_METHOD_FREEMEM       = null;
    public static final String CLEANUP_IDLESLEEP            = "90_cleanup_idlesleep";
    public static final String CLEANUP_BUSYSLEEP            = "90_cleanup_busysleep";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // RAM Cache settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>RAM_CACHE_LURL</strong> = "ramCacheLURL"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Loaded URLs DB for caching purposes</p>
     */
    public static final String RAM_CACHE_LURL_TIME      = "ramCacheLURL_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_NURL</strong> = "ramCacheNURL"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Noticed URLs DB for caching purposes</p>
     */
    public static final String RAM_CACHE_NURL_TIME      = "ramCacheNURL_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_EURL</strong> = "ramCacheEURL"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Erroneous URLs DB for caching purposes</p>
     */
    public static final String RAM_CACHE_EURL_TIME      = "ramCacheEURL_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_RWI</strong> = "ramCacheRWI"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the RWIs DB for caching purposes</p>
     */
    public static final String RAM_CACHE_RWI_TIME       = "ramCacheRWI_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_HTTP</strong> = "ramCacheHTTP"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the HTTP Headers DB for caching purposes</p>
     */
    public static final String RAM_CACHE_HTTP_TIME      = "ramCacheHTTP_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_MESSAGE</strong> = "ramCacheMessage"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Message DB for caching purposes</p>
     */
    public static final String RAM_CACHE_MESSAGE_TIME   = "ramCacheMessage_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_ROBOTS</strong> = "ramCacheRobots"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the robots.txts DB for caching purposes</p>
     */
    public static final String RAM_CACHE_ROBOTS_TIME    = "ramCacheRobots_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_PROFILES</strong> = "ramCacheProfiles"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Crawl Profiles DB for caching purposes</p>
     */
    public static final String RAM_CACHE_PROFILES_TIME  = "ramCacheProfiles_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_PRE_NURL</strong> = "ramCachePreNURL"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Pre-Noticed URLs DB for caching purposes</p>
     */
    public static final String RAM_CACHE_PRE_NURL_TIME  = "ramCachePreNURL_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_WIKI</strong> = "ramCacheWiki"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Wiki DB for caching purposes</p>
     */
    public static final String RAM_CACHE_WIKI_TIME      = "ramCacheWiki_time";
    /**
     * <p><code>public static final String <strong>RAM_CACHE_BLOG</strong> = "ramCacheBlog"</code></p>
     * <p>Name of the setting how much memory in bytes should be assigned to the Blog DB for caching purposes</p>
     */
    public static final String RAM_CACHE_BLOG_TIME      = "ramCacheBlog_time";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // DHT settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>INDEX_DIST_DHT_RECEIPT_LIMIT</strong> = "indexDistribution.dhtReceiptLimit"</code></p>
     * <p>Name of the setting how many words the DHT-In cache may contain maximal before new DHT receipts
     * will be rejected</p>
     */
    public static final String INDEX_DIST_DHT_RECEIPT_LIMIT     = "indexDistribution.dhtReceiptLimit";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_CHUNK_SIZE_START</strong> = "indexDistribution.startChunkSize"</code></p>
     * <p>Name of the setting specifying how many words the very first chunk will contain when the DHT-thread starts</p>
     */
    public static final String INDEX_DIST_CHUNK_SIZE_START      = "indexDistribution.startChunkSize";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_CHUNK_SIZE_MIN</strong> = "indexDistribution.minChunkSize"</code></p>
     * <p>Name of the setting specifying how many words the smallest chunk may contain</p>
     */
    public static final String INDEX_DIST_CHUNK_SIZE_MIN        = "indexDistribution.minChunkSize";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_CHUNK_SIZE_MAX</strong> = "indexDistribution.maxChunkSize"</code></p>
     * <p>Name of the setting specifying how many words the hugest chunk may contain</p>
     */
    public static final String INDEX_DIST_CHUNK_SIZE_MAX        = "indexDistribution.maxChunkSize";
    public static final String INDEX_DIST_CHUNK_FAILS_MAX       = "indexDistribution.maxChunkFails";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_TIMEOUT</strong> = "indexDistribution.timeout"</code></p>
     * <p>Name of the setting how long the timeout for an Index Distribution shall be in milliseconds</p>
     */
    public static final String INDEX_DIST_TIMEOUT               = "indexDistribution.timeout";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_GZIP_BODY</strong> = "indexDistribution.gzipBody"</code></p>
     * <p>Name of the setting whether DHT chunks shall be transferred gzip-encodedly</p>
     */
    public static final String INDEX_DIST_GZIP_BODY             = "indexDistribution.gzipBody";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_ALLOW</strong> = "allowDistributeIndex"</code></p>
     * <p>Name of the setting whether Index Distribution shall be allowed (and the DHT-thread therefore started) or not</p>
     * 
     * @see plasmaSwitchboard#INDEX_DIST_ALLOW_WHILE_CRAWLING
     */
    public static final String INDEX_DIST_ALLOW                 = "allowDistributeIndex";
    public static final String INDEX_RECEIVE_ALLOW              = "allowReceiveIndex";
    /**
     * <p><code>public static final String <strong>INDEX_DIST_ALLOW_WHILE_CRAWLING</strong> = "allowDistributeIndexWhileCrawling"</code></p>
     * <p>Name of the setting whether Index Distribution shall be allowed while crawling is in progress, i.e.
     * the Local Crawler Queue is filled.</p>
     * <p>This setting only has effect if {@link #INDEX_DIST_ALLOW} is enabled</p>
     * 
     * @see plasmaSwitchboard#INDEX_DIST_ALLOW
     */
    public static final String INDEX_DIST_ALLOW_WHILE_CRAWLING  = "allowDistributeIndexWhileCrawling";
    public static final String INDEX_DIST_ALLOW_WHILE_INDEXING  = "allowDistributeIndexWhileIndexing";
    public static final String INDEX_TRANSFER_TIMEOUT           = "indexTransfer.timeout";
    public static final String INDEX_TRANSFER_GZIP_BODY         = "indexTransfer.gzipBody";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Ranking settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    public static final String RANKING_DIST_ON                  = "CRDistOn";
    public static final String RANKING_DIST_0_PATH              = "CRDist0Path";
    public static final String RANKING_DIST_0_METHOD            = "CRDist0Method";
    public static final String RANKING_DIST_0_PERCENT           = "CRDist0Percent";
    public static final String RANKING_DIST_0_TARGET            = "CRDist0Target";
    public static final String RANKING_DIST_1_PATH              = "CRDist1Path";
    public static final String RANKING_DIST_1_METHOD            = "CRDist1Method";
    public static final String RANKING_DIST_1_PERCENT           = "CRDist1Percent";
    public static final String RANKING_DIST_1_TARGET            = "CRDist1Target";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Parser settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    public static final String PARSER_MIMETYPES_HTML            = "parseableMimeTypes.HTML";
    public static final String PARSER_MIMETYPES_PROXY           = "parseableMimeTypes.PROXY";
    public static final String PARSER_MIMETYPES_CRAWLER         = "parseableMimeTypes.CRAWLER";
    public static final String PARSER_MIMETYPES_ICAP            = "parseableMimeTypes.ICAP";
    public static final String PARSER_MIMETYPES_URLREDIRECTOR   = "parseableMimeTypes.URLREDIRECTOR";
    public static final String PARSER_MIMETYPES_IMAGE           = "parseableMimeTypes.IMAGE";
    public static final String PARSER_MEDIA_EXT                 = "mediaExt";
    public static final String PARSER_MEDIA_EXT_PARSEABLE       = "parseableExt";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Proxy settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>PROXY_ONLINE_CAUTION_DELAY</strong> = "onlineCautionDelay"</code></p>
     * <p>Name of the setting how long indexing should pause after the last time the proxy was used in milliseconds</p> 
     */
    public static final String PROXY_ONLINE_CAUTION_DELAY        = "crawlPause.proxy";
    public static final String LOCALSEACH_ONLINE_CAUTION_DELAY   = "crawlPause.localsearch";
    public static final String REMOTESEARCH_ONLINE_CAUTION_DELAY = "crawlPause.remotesearch";
    /**
     * <p><code>public static final String <strong>PROXY_PREFETCH_DEPTH</strong> = "proxyPrefetchDepth"</code></p>
     * <p>Name of the setting how deep URLs fetched by proxy usage shall be followed</p>
     */
    public static final String PROXY_PREFETCH_DEPTH             = "proxyPrefetchDepth";
    public static final String PROXY_CRAWL_ORDER                = "proxyCrawlOrder";
    
    public static final String PROXY_INDEXING_REMOTE            = "proxyIndexingRemote";
    public static final String PROXY_INDEXING_LOCAL_TEXT        = "proxyIndexingLocalText";
    public static final String PROXY_INDEXING_LOCAL_MEDIA       = "proxyIndexingLocalMedia";
    
    public static final String PROXY_CACHE_SIZE                 = "proxyCacheSize";
    /**
     * <p><code>public static final String <strong>PROXY_CACHE_LAYOUT</strong> = "proxyCacheLayout"</code></p>
     * <p>Name of the setting which file-/folder-layout the proxy cache shall use. Possible values are {@link #PROXY_CACHE_LAYOUT_TREE}
     * and {@link #PROXY_CACHE_LAYOUT_HASH}</p>
     * 
     * @see plasmaSwitchboard#PROXY_CACHE_LAYOUT_TREE
     * @see plasmaSwitchboard#PROXY_CACHE_LAYOUT_HASH
     */
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Cluster settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    public static final String CLUSTER_MODE                     = "cluster.mode";
    public static final String CLUSTER_MODE_PUBLIC_CLUSTER      = "publiccluster";
    public static final String CLUSTER_MODE_PRIVATE_CLUSTER     = "privatecluster";
    public static final String CLUSTER_MODE_PUBLIC_PEER         = "publicpeer";
    public static final String CLUSTER_PEERS_IPPORT             = "cluster.peers.ipport";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Miscellaneous settings
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    public static final String CRAWL_PROFILE_PROXY                 = "proxy";
    public static final String CRAWL_PROFILE_REMOTE                = "remote";
    public static final String CRAWL_PROFILE_SNIPPET_LOCAL_TEXT    = "snippetLocalText";
    public static final String CRAWL_PROFILE_SNIPPET_GLOBAL_TEXT   = "snippetGlobalText";
    public static final String CRAWL_PROFILE_SNIPPET_LOCAL_MEDIA   = "snippetLocalMedia";
    public static final String CRAWL_PROFILE_SNIPPET_GLOBAL_MEDIA  = "snippetGlobalMedia";
    
    /**
     * <p><code>public static final String <strong>CRAWLER_THREADS_ACTIVE_MAX</strong> = "crawler.MaxActiveThreads"</code></p>
     * <p>Name of the setting how many active crawler-threads may maximal be running on the same time</p>
     */
    public static final String CRAWLER_THREADS_ACTIVE_MAX       = "crawler.MaxActiveThreads";

    public static final String OWN_SEED_FILE                    = "yacyOwnSeedFile";
    public static final String YACY_MODE_DEBUG                  = "yacyDebugMode";
    public static final String WORDCACHE_INIT_COUNT             = "wordCacheInitCount";
    /**
     * <p><code>public static final String <strong>WORDCACHE_MAX_COUNT</strong> = "wordCacheMaxCount"</code></p>
     * <p>Name of the setting how many words the word-cache (or DHT-Out cache) shall contain maximal. Indexing pages if the
     * cache has reached this limit will slow down the indexing process by flushing some of it's entries</p>
     */
    public static final String WORDCACHE_MAX_COUNT              = "wordCacheMaxCount";
    
    public static final String HTTPC_NAME_CACHE_CACHING_PATTERNS_NO = "httpc.nameCacheNoCachingPatterns";
    
    public static final String ROBOTS_TXT                       = "httpd.robots.txt";
    public static final String ROBOTS_TXT_DEFAULT               = httpdRobotsTxtConfig.LOCKED + "," + httpdRobotsTxtConfig.DIRS;
    
    public static final String WIKIPARSER_CLASS                 = "wikiParser.class";
    public static final String WIKIPARSER_CLASS_DEFAULT         = "de.anomic.data.wikiCode";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // Lists
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>BLACKLIST_CLASS</strong> = "Blacklist.class"</code></p>
     * <p>Name of the setting which Blacklist backend shall be used. Due to different requirements of users, the
     * {@link plasmaURLPattern}-interface has been created to support blacklist engines different from YaCy's default</p>
     * <p>Attention is required when the backend is changed, because different engines may have different syntaxes</p>
     */
    public static final String BLACKLIST_CLASS          = "BlackLists.class";
    /**
     * <p><code>public static final String <strong>BLACKLIST_CLASS_DEFAULT</strong> = "de.anomic.plasma.urlPattern.defaultURLPattern"</code></p>
     * <p>Package and name of YaCy's {@link indexDefaultReferenceBlacklist default} blacklist implementation</p>
     * 
     * @see indexDefaultReferenceBlacklist for a detailed overview about the syntax of the default implementation
     */
    public static final String BLACKLIST_CLASS_DEFAULT  = "de.anomic.index.indexDefaultReferenceBlacklist";
    
    public static final String LIST_BLUE                = "plasmaBlueList";
    public static final String LIST_BLUE_DEFAULT        = null;
    public static final String LIST_BADWORDS_DEFAULT    = "yacy.badwords";
    public static final String LIST_STOPWORDS_DEFAULT   = "yacy.stopwords";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // DB Paths
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>DBPATH</strong> = "dbPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * databases containing queues are stored</p>
     */
    public static final String PLASMA_PATH              = "dbPath";
    public static final String PLASMA_PATH_DEFAULT      = "DATA/PLASMADB";
    /**
     * <p><code>public static final String <strong>HTCACHE_PATH</strong> = "proxyCache"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * downloaded webpages and their respective ressources and HTTP-headers are stored. It is the location containing
     * the proxy-cache</p>
     * 
     * @see plasmaSwitchboard#PROXY_CACHE_LAYOUT for details on the file-layout in this path
     */
    public static final String HTCACHE_PATH             = "proxyCache";
    public static final String HTCACHE_PATH_DEFAULT     = "DATA/HTCACHE";
    public static final String RELEASE_PATH             = "releases";
    public static final String RELEASE_PATH_DEFAULT     = "DATA/RELEASE";
    /**
     * <p><code>public static final String <strong>HTDOCS_PATH</strong> = "htDocsPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * user-ressources (i.e. for the fileshare or the contents displayed on <code>www.peername.yacy</code>) lie.
     * The translated templates of the webinterface will also be put in here</p>
     */
    public static final String HTDOCS_PATH              = "htDocsPath";
    public static final String HTDOCS_PATH_DEFAULT      = "DATA/HTDOCS";
    /**
     * <p><code>public static final String <strong>HTROOT_PATH</strong> = "htRootPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * original servlets, their stylesheets, scripts, etc. lie. It is also home of the XML-interface to YaCy</p> 
     */
    public static final String HTROOT_PATH              = "htRootPath";
    public static final String HTROOT_PATH_DEFAULT      = "htroot";
    /**
     * <p><code>public static final String <strong>INDEX_PATH</strong> = "indexPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where the
     * whole database of known RWIs and URLs as well as dumps of the DHT-In and DHT-Out caches are stored</p>
     */
    public static final String INDEX_PRIMARY_PATH       = "indexPrimaryPath"; // this is a relative path to the data root
    public static final String INDEX_SECONDARY_PATH     = "indexSecondaryPath"; // this is a absolute path to any location
    public static final String INDEX_PATH_DEFAULT       = "DATA/INDEX";
    /**
     * <p><code>public static final String <strong>LISTS_PATH</strong> = "listsPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * user-lists like blacklists, etc. are stored</p>
     */
    public static final String LISTS_PATH               = "listsPath";
    public static final String LISTS_PATH_DEFAULT       = "DATA/LISTS";
    /**
     * <p><code>public static final String <strong>RANKING_PATH</strong> = "rankingPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * ranking files are stored, self-generated as well as received ranking files</p>
     * 
     * @see plasmaSwitchboard#RANKING_DIST_0_PATH
     * @see plasmaSwitchboard#RANKING_DIST_1_PATH
     */
    public static final String RANKING_PATH             = "rankingPath";
    public static final String RANKING_PATH_DEFAULT     = "DATA/RANKING";
    /**
     * <p><code>public static final String <strong>WORK_PATH</strong> = "wordPath"</code></p>
     * <p>Name of the setting specifying the folder beginning from the YaCy-installation's top-folder, where all
     * DBs containing "work" of the user are saved. Such include bookmarks, messages, wiki, blog</p>
     * 
     * @see plasmaSwitchboard#DBFILE_BLOG
     * @see plasmaSwitchboard#DBFILE_BOOKMARKS
     * @see plasmaSwitchboard#DBFILE_BOOKMARKS_DATES
     * @see plasmaSwitchboard#DBFILE_BOOKMARKS_TAGS
     * @see plasmaSwitchboard#DBFILE_MESSAGE
     * @see plasmaSwitchboard#DBFILE_WIKI
     * @see plasmaSwitchboard#DBFILE_WIKI_BKP
     */
    public static final String WORK_PATH                = "workPath";
    public static final String WORK_PATH_DEFAULT        = "DATA/WORK";
    
    //////////////////////////////////////////////////////////////////////////////////////////////
    // DB files
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    /**
     * <p><code>public static final String <strong>DBFILE_MESSAGE</strong> = "message.db"</code></p>
     * <p>Name of the file containing the database holding the user's peer-messages</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder, this file lies in
     */
    public static final String DBFILE_MESSAGE           = "message.db";
    /**
     * <p><code>public static final String <strong>DBFILE_WIKI</strong> = "wiki.db"</code></p>
     * <p>Name of the file containing the database holding the whole wiki of this peer</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder, this file lies in
     * @see plasmaSwitchboard#DBFILE_WIKI_BKP for the file previous versions of wiki-pages lie in
     */
    public static final String DBFILE_WIKI              = "wiki.db";
    /**
     * <p><code>public static final String <strong>DBFILE_WIKI_BKP</strong> = "wiki-bkp.db"</code></p>
     * <p>Name of the file containing the database holding all versions but the latest of the wiki-pages of this peer</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     * @see plasmaSwitchboard#DBFILE_WIKI for the file the latest version of wiki-pages lie in
     */
    public static final String DBFILE_WIKI_BKP          = "wiki-bkp.db";
    /**
     * <p><code>public static final String <strong>DBFILE_BLOG</strong> = "blog.db"</code></p>
     * <p>Name of the file containing the database holding all blog-entries available on this peer</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     */
    public static final String DBFILE_BLOG              = "blog.db";
    /**
     * <p><code>public static final String <strong>DBFILE_BLOGCOMMENTS</strong> = "blogComment.db"</code></p>
     * <p>Name of the file containing the database holding all blogComment-entries available on this peer</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     */
    public static final String DBFILE_BLOGCOMMENTS      = "blogComment.db";
    /**
     * <p><code>public static final String <strong>DBFILE_BOOKMARKS</strong> = "bookmarks.db"</code></p>
     * <p>Name of the file containing the database holding all bookmarks available on this peer</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     * @see bookmarksDB for more detailed overview about the bookmarks structure
     */
    public static final String DBFILE_BOOKMARKS         = "bookmarks.db";
    /**
     * <p><code>public static final String <strong>DBFILE_BOOKMARKS_TAGS</strong> = "bookmarkTags.db"</code></p>
     * <p>Name of the file containing the database holding all tag-&gt;bookmark relations</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     * @see bookmarksDB for more detailed overview about the bookmarks structure
     */
    public static final String DBFILE_BOOKMARKS_TAGS    = "bookmarkTags.db";
    /**
     * <p><code>public static final String <strong>DBFILE_BOOKMARKS_DATES</strong> = "bookmarkDates.db"</code></p>
     * <p>Name of the file containing the database holding all date-&gt;bookmark relations</p>
     * 
     * @see plasmaSwitchboard#WORK_PATH for the folder this file lies in
     * @see bookmarksDB for more detailed overview about the bookmarks structure
     */
    public static final String DBFILE_BOOKMARKS_DATES   = "bookmarkDates.db";
    /**
     * <p><code>public static final String <strong>DBFILE_OWN_SEED</strong> = "mySeed.txt"</code></p>
     * <p>Name of the file containing the database holding this peer's seed</p>
     */
    public static final String DBFILE_OWN_SEED          = "mySeed.txt";
    /**
     * <p><code>public static final String <strong>DBFILE_CRAWL_PROFILES</strong> = "crawlProfiles0.db"</code>
     * <p>Name of the file containing the database holding all recent crawl profiles</p>
     * 
     * @see plasmaSwitchboard#PLASMA_PATH for the folder this file lies in
     */
    public static final String DBFILE_ACTIVE_CRAWL_PROFILES    = "crawlProfilesActive1.db";
    public static final String DBFILE_PASSIVE_CRAWL_PROFILES    = "crawlProfilesPassive1.db";
    /**
     * <p><code>public static final String <strong>DBFILE_CRAWL_ROBOTS</strong> = "crawlRobotsTxt.db"</code></p>
     * <p>Name of the file containing the database holding all <code>robots.txt</code>-entries of the lately crawled domains</p>
     * 
     * @see plasmaSwitchboard#PLASMA_PATH for the folder this file lies in
     */
    public static final String DBFILE_CRAWL_ROBOTS      = "crawlRobotsTxt1.db";
    /**
     * <p><code>public static final String <strong>DBFILE_USER</strong> = "DATA/SETTINGS/user.db"</code></p>
     * <p>Path to the user-DB, beginning from the YaCy-installation's top-folder. It holds all rights the created
     * users have as well as all other needed data about them</p>
     */
    public static final String DBFILE_USER              = "DATA/SETTINGS/user.db";
    
    
    public Hashtable<String, Object[]> crawlJobsStatus = new Hashtable<String, Object[]>(); 
    
    private static plasmaSwitchboard sb;
    
    public plasmaSwitchboard(File rootPath, String initPath, String configPath, boolean applyPro) {
        super(rootPath, initPath, configPath, applyPro);
        serverProfiling.startSystemProfiling();
        sb=this;
        
        // set loglevel and log
        setLog(new serverLog("PLASMA"));
        if (applyPro) this.log.logInfo("This is the pro-version of YaCy");
        
        // remote proxy configuration
        httpdProxyHandler.setRemoteProxyConfig(httpRemoteProxyConfig.init(this)); // TODO refactoring
        this.log.logConfig("Remote proxy configuration:\n" + httpdProxyHandler.getRemoteProxyConfig().toString());
        
        // load network configuration into settings
        String networkUnitDefinition = getConfig("network.unit.definition", "defaults/yacy.network.freeworld.unit");
        String networkGroupDefinition = getConfig("network.group.definition", "yacy.network.group");
        // patch old values
        if (networkUnitDefinition.equals("yacy.network.unit")) {
            networkUnitDefinition = "defaults/yacy.network.freeworld.unit";
            setConfig("network.unit.definition", networkUnitDefinition);
        }
        
        // include additional network definition properties into our settings
        // note that these properties cannot be set in the application because they are
        // _always_ overwritten each time with the default values. This is done so on purpose.
        // the network definition should be made either consistent for all peers,
        // or independently using a bootstrap URL
        Map<String, String> initProps;
        if (networkUnitDefinition.startsWith("http://")) {
            try {
                this.setConfig(plasmaSwitchboard.loadHashMap(new yacyURL(networkUnitDefinition, null)));
            } catch (MalformedURLException e) {
            }
        } else {
            File networkUnitDefinitionFile = (networkUnitDefinition.startsWith("/")) ? new File(networkUnitDefinition) : new File(rootPath, networkUnitDefinition);
            if (networkUnitDefinitionFile.exists()) {
                initProps = serverFileUtils.loadHashMap(networkUnitDefinitionFile);
                this.setConfig(initProps);
            }
        }
        if (networkGroupDefinition.startsWith("http://")) {
            try {
                this.setConfig(plasmaSwitchboard.loadHashMap(new yacyURL(networkGroupDefinition, null)));
            } catch (MalformedURLException e) {
            }
        } else {
            File networkGroupDefinitionFile = new File(rootPath, networkGroupDefinition);
            if (networkGroupDefinitionFile.exists()) {
                initProps = serverFileUtils.loadHashMap(networkGroupDefinitionFile);
                this.setConfig(initProps);
            }
        }

        // set release locations
        int i = 0;
        String location;
        while (true) {
            location = getConfig("network.unit.update.location" + i, "");
            if (location.length() == 0) break;
            try {
                yacyVersion.latestReleaseLocations.add(new yacyURL(location, null));
            } catch (MalformedURLException e) {
                break;
            }
            i++;
        }
        
        // initiate url license object
        licensedURLs = new URLLicense(8);
        
        // set URL domain acceptance
        this.acceptGlobalURLs = "global.any".indexOf(getConfig("network.unit.domain", "global")) >= 0;
        this.acceptLocalURLs = "local.any".indexOf(getConfig("network.unit.domain", "global")) >= 0;
        
        // load values from configs
        this.plasmaPath   = getConfigPath(PLASMA_PATH, PLASMA_PATH_DEFAULT);
        this.log.logConfig("Plasma DB Path: " + this.plasmaPath.toString());
        this.indexPrimaryPath = getConfigPath(INDEX_PRIMARY_PATH, INDEX_PATH_DEFAULT);
        this.log.logConfig("Index Primary Path: " + this.indexPrimaryPath.toString());
        this.indexSecondaryPath = (getConfig(INDEX_SECONDARY_PATH, "").length() == 0) ? indexPrimaryPath : new File(getConfig(INDEX_SECONDARY_PATH, ""));
        this.log.logConfig("Index Secondary Path: " + this.indexSecondaryPath.toString());
        this.listsPath      = getConfigPath(LISTS_PATH, LISTS_PATH_DEFAULT);
        this.log.logConfig("Lists Path:     " + this.listsPath.toString());
        this.htDocsPath   = getConfigPath(HTDOCS_PATH, HTDOCS_PATH_DEFAULT);
        this.log.logConfig("HTDOCS Path:    " + this.htDocsPath.toString());
        this.rankingPath   = getConfigPath(RANKING_PATH, RANKING_PATH_DEFAULT);
        this.log.logConfig("Ranking Path:    " + this.rankingPath.toString());
        this.rankingPermissions = new HashMap<String, String>(); // mapping of permission - to filename.
        this.workPath   = getConfigPath(WORK_PATH, WORK_PATH_DEFAULT);
        this.log.logConfig("Work Path:    " + this.workPath.toString());
        
        // start indexing management
        log.logConfig("Starting Indexing Management");
        String networkName = getConfig("network.unit.name", "");
        wordIndex = new plasmaWordIndex(indexPrimaryPath, indexSecondaryPath, networkName, log);
        crawlResults = new plasmaCrawlResultURLs();
        
        // start yacy core
        log.logConfig("Starting YaCy Protocol Core");
        this.yc = new yacyCore(this);
        serverInstantBusyThread.oneTimeJob(yacyCore.peerActions, "loadSeedLists", yacyCore.log, 0);
        long startedSeedListAquisition = System.currentTimeMillis();
        
        // set up local robots.txt
        this.robotstxtConfig = httpdRobotsTxtConfig.init(this);
        
        // setting timestamp of last proxy access
        this.proxyLastAccess = System.currentTimeMillis() - 60000;
        this.localSearchLastAccess = System.currentTimeMillis() - 60000;
        this.remoteSearchLastAccess = System.currentTimeMillis() - 60000;
        this.webStructure = new plasmaWebStructure(log, rankingPath, "LOCAL/010_cr/", getConfig("CRDist0Path", plasmaRankingDistribution.CR_OWN), new File(plasmaPath, "webStructure.map"));
        
        // configuring list path
        if (!(listsPath.exists())) listsPath.mkdirs();
        
        // load coloured lists
        if (blueList == null) {
            // read only once upon first instantiation of this class
            String f = getConfig(LIST_BLUE, LIST_BLUE_DEFAULT);
            File plasmaBlueListFile = new File(f);
            if (f != null) blueList = kelondroMSetTools.loadList(plasmaBlueListFile, kelondroNaturalOrder.naturalComparator); else blueList= new TreeSet<String>();
            this.log.logConfig("loaded blue-list from file " + plasmaBlueListFile.getName() + ", " +
            blueList.size() + " entries, " +
            ppRamString(plasmaBlueListFile.length()/1024));
        }
        
        // load the black-list / inspired by [AS]
        File blacklistsPath = getConfigPath(LISTS_PATH, LISTS_PATH_DEFAULT);
        String blacklistClassName = getConfig(BLACKLIST_CLASS, BLACKLIST_CLASS_DEFAULT);
        if (blacklistClassName.equals("de.anomic.plasma.urlPattern.defaultURLPattern")) {
            // patch old class location
            blacklistClassName = BLACKLIST_CLASS_DEFAULT;
            setConfig(BLACKLIST_CLASS, blacklistClassName);
        }
            
        this.log.logConfig("Starting blacklist engine ...");
        try {
            Class<?> blacklistClass = Class.forName(blacklistClassName);
            Constructor<?> blacklistClassConstr = blacklistClass.getConstructor( new Class[] { File.class } );
            urlBlacklist = (indexReferenceBlacklist) blacklistClassConstr.newInstance(new Object[] { blacklistsPath });
            this.log.logFine("Used blacklist engine class: " + blacklistClassName);
            this.log.logConfig("Using blacklist engine: " + urlBlacklist.getEngineInfo());
        } catch (Exception e) {
            this.log.logSevere("Unable to load the blacklist engine",e);
            System.exit(-1);
        } catch (Error e) {
            this.log.logSevere("Unable to load the blacklist engine",e);
            System.exit(-1);
        }
      
        this.log.logConfig("Loading backlist data ...");
        listManager.switchboard = this;
        listManager.listsPath = blacklistsPath;        
        listManager.reloadBlacklists();

        // load badwords (to filter the topwords)
        if (badwords == null) {
            File badwordsFile = new File(rootPath, LIST_BADWORDS_DEFAULT);
            badwords = kelondroMSetTools.loadList(badwordsFile, kelondroNaturalOrder.naturalComparator);
            this.log.logConfig("loaded badwords from file " + badwordsFile.getName() +
                               ", " + badwords.size() + " entries, " +
                               ppRamString(badwordsFile.length()/1024));
        }

        // load stopwords
        if (stopwords == null) {
            File stopwordsFile = new File(rootPath, LIST_STOPWORDS_DEFAULT);
            stopwords = kelondroMSetTools.loadList(stopwordsFile, kelondroNaturalOrder.naturalComparator);
            this.log.logConfig("loaded stopwords from file " + stopwordsFile.getName() + ", " +
            stopwords.size() + " entries, " +
            ppRamString(stopwordsFile.length()/1024));
        }

        // load ranking tables
        File YBRPath = new File(rootPath, "ranking/YBR");
        if (YBRPath.exists()) {
            plasmaSearchRankingProcess.loadYBR(YBRPath, 15);
        }
        
        // make crawl profiles database and default profiles
        this.log.logConfig("Initializing Crawl Profiles");
        File profilesActiveFile = new File(this.plasmaPath, DBFILE_ACTIVE_CRAWL_PROFILES);
        this.profilesActiveCrawls = new plasmaCrawlProfile(profilesActiveFile);
        initActiveCrawlProfiles();
        log.logConfig("Loaded active crawl profiles from file " + profilesActiveFile.getName() +
                ", " + this.profilesActiveCrawls.size() + " entries" +
                ", " + ppRamString(profilesActiveFile.length()/1024));
        File profilesPassiveFile = new File(this.plasmaPath, DBFILE_PASSIVE_CRAWL_PROFILES);
        this.profilesPassiveCrawls = new plasmaCrawlProfile(profilesPassiveFile);
        log.logConfig("Loaded passive crawl profiles from file " + profilesPassiveFile.getName() +
                ", " + this.profilesPassiveCrawls.size() + " entries" +
                ", " + ppRamString(profilesPassiveFile.length()/1024));
        
        // loading the robots.txt db
        this.log.logConfig("Initializing robots.txt DB");
        File robotsDBFile = new File(this.plasmaPath, DBFILE_CRAWL_ROBOTS);
        robots = new plasmaCrawlRobotsTxt(robotsDBFile);
        this.log.logConfig("Loaded robots.txt DB from file " + robotsDBFile.getName() +
        ", " + robots.size() + " entries" +
        ", " + ppRamString(robotsDBFile.length()/1024));
        
        // start a cache manager
        log.logConfig("Starting HT Cache Manager");
        
        // create the cache directory
        htCachePath = getConfigPath(HTCACHE_PATH, HTCACHE_PATH_DEFAULT);
        this.log.logInfo("HTCACHE Path = " + htCachePath.getAbsolutePath());
        long maxCacheSize = 1024 * 1024 * Long.parseLong(getConfig(PROXY_CACHE_SIZE, "2")); // this is megabyte
        plasmaHTCache.init(htCachePath, maxCacheSize);
        
        // create the release download directory
        releasePath = getConfigPath(RELEASE_PATH, RELEASE_PATH_DEFAULT);
        releasePath.mkdirs();
        this.log.logInfo("RELEASE Path = " + releasePath.getAbsolutePath());
       
        // starting message board
        initMessages();
        
        // starting wiki
        initWiki();
        
        //starting blog
        initBlog();
        
        // Init User DB
        this.log.logConfig("Loading User DB");
        File userDbFile = new File(getRootPath(), DBFILE_USER);
        this.userDB = new userDB(userDbFile);
        this.log.logConfig("Loaded User DB from file " + userDbFile.getName() +
        ", " + this.userDB.size() + " entries" +
        ", " + ppRamString(userDbFile.length()/1024));
        
        //Init bookmarks DB
        initBookmarks();
        
        // set a high maximum cache size to current size; this is adopted later automatically
        int wordCacheMaxCount = Math.max((int) getConfigLong(WORDCACHE_INIT_COUNT, 30000),
                                         (int) getConfigLong(WORDCACHE_MAX_COUNT, 20000));
        setConfig(WORDCACHE_MAX_COUNT, Integer.toString(wordCacheMaxCount));
        wordIndex.setMaxWordCount(wordCacheMaxCount);
        
        // set a maximum amount of memory for the caches
        // long memprereq = Math.max(getConfigLong(INDEXER_MEMPREREQ, 0), wordIndex.minMem());
        // setConfig(INDEXER_MEMPREREQ, memprereq);
        // setThreadPerformance(INDEXER, getConfigLong(INDEXER_IDLESLEEP, 0), getConfigLong(INDEXER_BUSYSLEEP, 0), memprereq);
        kelondroCachedRecords.setCacheGrowStati(40 * 1024 * 1024, 20 * 1024 * 1024);
        kelondroCache.setCacheGrowStati(40 * 1024 * 1024, 20 * 1024 * 1024);
        
        // make parser
        log.logConfig("Starting Parser");
        this.parser = new plasmaParser();
        
        /* ======================================================================
         * initialize switchboard queue
         * ====================================================================== */
        // create queue
        this.sbQueue = new plasmaSwitchboardQueue(wordIndex, new File(this.plasmaPath, "switchboardQueue2.stack"), this.profilesActiveCrawls);
        
        // define an extension-blacklist
        log.logConfig("Parser: Initializing Extension Mappings for Media/Parser");
        plasmaParser.initMediaExt(plasmaParser.extString2extList(getConfig(PARSER_MEDIA_EXT,"")));
        plasmaParser.initSupportedHTMLFileExt(plasmaParser.extString2extList(getConfig(PARSER_MEDIA_EXT_PARSEABLE,"")));
        
        // define a realtime parsable mimetype list
        log.logConfig("Parser: Initializing Mime Types");
        plasmaParser.initHTMLParsableMimeTypes(getConfig(PARSER_MIMETYPES_HTML, "application/xhtml+xml,text/html,text/plain"));
        plasmaParser.initParseableMimeTypes(plasmaParser.PARSER_MODE_PROXY, getConfig(PARSER_MIMETYPES_PROXY, null));
        plasmaParser.initParseableMimeTypes(plasmaParser.PARSER_MODE_CRAWLER, getConfig(PARSER_MIMETYPES_CRAWLER, null));
        plasmaParser.initParseableMimeTypes(plasmaParser.PARSER_MODE_ICAP, getConfig(PARSER_MIMETYPES_ICAP, null));
        plasmaParser.initParseableMimeTypes(plasmaParser.PARSER_MODE_URLREDIRECTOR, getConfig(PARSER_MIMETYPES_URLREDIRECTOR, null));
        plasmaParser.initParseableMimeTypes(plasmaParser.PARSER_MODE_IMAGE, getConfig(PARSER_MIMETYPES_IMAGE, null));
        
        // start a loader
        log.logConfig("Starting Crawl Loader");
        this.crawlQueues = new plasmaCrawlQueues(this, plasmaPath);
                
        /*
         * Creating sync objects and loading status for the crawl jobs
         * a) local crawl
         * b) remote triggered crawl
         * c) global crawl trigger
         */
        this.crawlJobsStatus.put(CRAWLJOB_LOCAL_CRAWL, new Object[]{
                new Object(),
                Boolean.valueOf(getConfig(CRAWLJOB_LOCAL_CRAWL + "_isPaused", "false"))});
        this.crawlJobsStatus.put(CRAWLJOB_REMOTE_TRIGGERED_CRAWL, new Object[]{
                new Object(),
                Boolean.valueOf(getConfig(CRAWLJOB_REMOTE_TRIGGERED_CRAWL + "_isPaused", "false"))});
        this.crawlJobsStatus.put(CRAWLJOB_REMOTE_CRAWL_LOADER, new Object[]{
                new Object(),
                Boolean.valueOf(getConfig(CRAWLJOB_REMOTE_CRAWL_LOADER + "_isPaused", "false"))});
        
        // init cookie-Monitor
        this.log.logConfig("Starting Cookie Monitor");
        this.outgoingCookies = new HashMap<String, Object[]>();
        this.incomingCookies = new HashMap<String, Object[]>();
        
        // init search history trackers
        this.localSearchTracker = new HashMap<String, TreeSet<Long>>(); // String:TreeSet - IP:set of Long(accessTime)
        this.remoteSearchTracker = new HashMap<String, TreeSet<Long>>();
        this.localSearches = new ArrayList<plasmaSearchQuery>(); // contains search result properties as HashMaps
        this.remoteSearches = new ArrayList<plasmaSearchQuery>();
        
        // init messages: clean up message symbol
        File notifierSource = new File(getRootPath(), getConfig(HTROOT_PATH, HTROOT_PATH_DEFAULT) + "/env/grafics/empty.gif");
        File notifierDest = new File(getConfigPath(HTDOCS_PATH, HTDOCS_PATH_DEFAULT), "notifier.gif");
        try {
            serverFileUtils.copy(notifierSource, notifierDest);
        } catch (IOException e) {
        }
        
        // clean up profiles
        this.log.logConfig("Cleaning Profiles");
        try { cleanProfiles(); } catch (InterruptedException e) { /* Ignore this here */ }
        
        // init ranking transmission
        /*
        CRDistOn       = true/false
        CRDist0Path    = GLOBAL/010_owncr
        CRDist0Method  = 1
        CRDist0Percent = 0
        CRDist0Target  =
        CRDist1Path    = GLOBAL/014_othercr/1
        CRDist1Method  = 9
        CRDist1Percent = 30
        CRDist1Target  = kaskelix.de:8080,yacy.dyndns.org:8000,suma-lab.de:8080
         **/
        rankingOn = getConfig(RANKING_DIST_ON, "true").equals("true") && networkName.equals("freeworld");
        rankingOwnDistribution = new plasmaRankingDistribution(log, new File(rankingPath, getConfig(RANKING_DIST_0_PATH, plasmaRankingDistribution.CR_OWN)), (int) getConfigLong(RANKING_DIST_0_METHOD, plasmaRankingDistribution.METHOD_ANYSENIOR), (int) getConfigLong(RANKING_DIST_0_METHOD, 0), getConfig(RANKING_DIST_0_TARGET, ""));
        rankingOtherDistribution = new plasmaRankingDistribution(log, new File(rankingPath, getConfig(RANKING_DIST_1_PATH, plasmaRankingDistribution.CR_OTHER)), (int) getConfigLong(RANKING_DIST_1_METHOD, plasmaRankingDistribution.METHOD_MIXEDSENIOR), (int) getConfigLong(RANKING_DIST_1_METHOD, 30), getConfig(RANKING_DIST_1_TARGET, "kaskelix.de:8080,yacy.dyndns.org:8000,suma-lab.de:8080"));
        
        // init facility DB
        /*
        log.logSystem("Starting Facility Database");
        File facilityDBpath = new File(getRootPath(), "DATA/SETTINGS/");
        facilityDB = new kelondroTables(facilityDBpath);
        facilityDB.declareMaps("backlinks", 250, 500, new String[] {"date"}, null);
        log.logSystem("..opened backlinks");
        facilityDB.declareMaps("zeitgeist",  40, 500);
        log.logSystem("..opened zeitgeist");
        facilityDB.declareTree("statistik", new int[]{11, 8, 8, 8, 8, 8, 8}, 0x400);
        log.logSystem("..opened statistik");
        facilityDB.update("statistik", (new serverDate()).toShortString(false).substring(0, 11), new long[]{1,2,3,4,5,6});
        long[] testresult = facilityDB.selectLong("statistik", "yyyyMMddHHm");
        testresult = facilityDB.selectLong("statistik", (new serverDate()).toShortString(false).substring(0, 11));
         */
        
        // init nameCacheNoCachingList
        String noCachingList = getConfig(HTTPC_NAME_CACHE_CACHING_PATTERNS_NO,"");
        String[] noCachingEntries = noCachingList.split(",");
        for (i = 0; i < noCachingEntries.length; i++) {
            String entry = noCachingEntries[i].trim();
            serverDomains.nameCacheNoCachingPatterns.add(entry);
        }
        
        // generate snippets cache
        log.logConfig("Initializing Snippet Cache");
        plasmaSnippetCache.init(parser, log);
        
        String wikiParserClassName = getConfig(WIKIPARSER_CLASS, WIKIPARSER_CLASS_DEFAULT);
        this.log.logConfig("Loading wiki parser " + wikiParserClassName + " ...");
        try {
            Class<?> wikiParserClass = Class.forName(wikiParserClassName);
            Constructor<?> wikiParserClassConstr = wikiParserClass.getConstructor(new Class[] { plasmaSwitchboard.class });
            wikiParser = (wikiParser)wikiParserClassConstr.newInstance(new Object[] { this });
        } catch (Exception e) {
            this.log.logSevere("Unable to load wiki parser, the wiki won't work", e);
        }
        
        // initializing the stackCrawlThread
        this.crawlStacker = new plasmaCrawlStacker(this, this.plasmaPath, (int) getConfigLong("tableTypeForPreNURL", 0), (((int) getConfigLong("tableTypeForPreNURL", 0) == 0) && (getConfigLong(CRAWLSTACK_BUSYSLEEP, 0) <= 100)));
        //this.sbStackCrawlThread = new plasmaStackCrawlThread(this,this.plasmaPath,ramPreNURL);
        //this.sbStackCrawlThread.start();
        
        // initializing dht chunk generation
        this.dhtTransferChunk = null;
        this.dhtTransferIndexCount = (int) getConfigLong(INDEX_DIST_CHUNK_SIZE_START, 50);
        
        // init robinson cluster
        // before we do that, we wait some time until the seed list is loaded.
        while (((System.currentTimeMillis() - startedSeedListAquisition) < 8000) && (yacyCore.seedDB.sizeConnected() == 0)) try {Thread.sleep(1000);} catch (InterruptedException e) {}
        try {Thread.sleep(1000);} catch (InterruptedException e) {}
        this.clusterhashes = yacyCore.seedDB.clusterHashes(getConfig("cluster.peers.yacydomain", ""));
        
        // deploy blocking threads
        indexingStorageProcessor      = new serverProcessor<indexingQueueEntry>(this, "storeDocumentIndex", 1, null);
        indexingAnalysisProcessor     = new serverProcessor<indexingQueueEntry>(this, "webStructureAnalysis", serverProcessor.useCPU + 1, indexingStorageProcessor);
        indexingCondensementProcessor = new serverProcessor<indexingQueueEntry>(this, "condenseDocument", serverProcessor.useCPU + 1, indexingAnalysisProcessor);
        indexingDocumentProcessor     = new serverProcessor<indexingQueueEntry>(this, "parseDocument", serverProcessor.useCPU + 1, indexingCondensementProcessor);
        
        // deploy busy threads
        log.logConfig("Starting Threads");
        serverMemory.gc(1000, "plasmaSwitchboard, help for profiler"); // help for profiler - thq

        moreMemory = new Timer(); // init GC Thread - thq
        moreMemory.schedule(new MoreMemory(), 300000, 600000);
        
        deployThread(CLEANUP, "Cleanup", "simple cleaning process for monitoring information", null,
        new serverInstantBusyThread(this, CLEANUP_METHOD_START, CLEANUP_METHOD_JOBCOUNT, CLEANUP_METHOD_FREEMEM), 10000); // all 5 Minutes
        deployThread(CRAWLSTACK, "Crawl URL Stacker", "process that checks url for double-occurrences and for allowance/disallowance by robots.txt", null,
        new serverInstantBusyThread(crawlStacker, CRAWLSTACK_METHOD_START, CRAWLSTACK_METHOD_JOBCOUNT, CRAWLSTACK_METHOD_FREEMEM), 8000);
        deployThread(INDEXER, "Indexing", "thread that either initiates a parsing/indexing queue, distributes the index into the DHT, stores parsed documents or flushes the index cache", "/IndexCreateIndexingQueue_p.html",
        new serverInstantBusyThread(this, INDEXER_METHOD_START, INDEXER_METHOD_JOBCOUNT, INDEXER_METHOD_FREEMEM), 10000);
        deployThread(PROXY_CACHE_ENQUEUE, "Proxy Cache Enqueue", "job takes new input files from RAM stack, stores them, and hands over to the Indexing Stack", null,
        new serverInstantBusyThread(this, PROXY_CACHE_ENQUEUE_METHOD_START, PROXY_CACHE_ENQUEUE_METHOD_JOBCOUNT, PROXY_CACHE_ENQUEUE_METHOD_FREEMEM), 10000);
        deployThread(CRAWLJOB_REMOTE_TRIGGERED_CRAWL, "Remote Crawl Job", "thread that performes a single crawl/indexing step triggered by a remote peer", null,
        new serverInstantBusyThread(crawlQueues, CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_START, CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_JOBCOUNT, CRAWLJOB_REMOTE_TRIGGERED_CRAWL_METHOD_FREEMEM), 30000);
        deployThread(CRAWLJOB_REMOTE_CRAWL_LOADER, "Remote Crawl URL Loader", "thread that loads remote crawl lists from other peers", "",
        new serverInstantBusyThread(crawlQueues, CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_START, CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_JOBCOUNT, CRAWLJOB_REMOTE_CRAWL_LOADER_METHOD_FREEMEM), 30000); // error here?
        deployThread(CRAWLJOB_LOCAL_CRAWL, "Local Crawl", "thread that performes a single crawl step from the local crawl queue", "/IndexCreateWWWLocalQueue_p.html",
        new serverInstantBusyThread(crawlQueues, CRAWLJOB_LOCAL_CRAWL_METHOD_START, CRAWLJOB_LOCAL_CRAWL_METHOD_JOBCOUNT, CRAWLJOB_LOCAL_CRAWL_METHOD_FREEMEM), 10000);
        deployThread(SEED_UPLOAD, "Seed-List Upload", "task that a principal peer performes to generate and upload a seed-list to a ftp account", null,
        new serverInstantBusyThread(yc, SEED_UPLOAD_METHOD_START, SEED_UPLOAD_METHOD_JOBCOUNT, SEED_UPLOAD_METHOD_FREEMEM), 180000);
        deployThread(PEER_PING, "YaCy Core", "this is the p2p-control and peer-ping task", null,
        new serverInstantBusyThread(yc, PEER_PING_METHOD_START, PEER_PING_METHOD_JOBCOUNT, PEER_PING_METHOD_FREEMEM), 2000);
        
        deployThread(INDEX_DIST, "DHT Distribution", "selection, transfer and deletion of index entries that are not searched on your peer, but on others", null,
            new serverInstantBusyThread(this, INDEX_DIST_METHOD_START, INDEX_DIST_METHOD_JOBCOUNT, INDEX_DIST_METHOD_FREEMEM), 60000,
            Long.parseLong(getConfig(INDEX_DIST_IDLESLEEP , "5000")),
            Long.parseLong(getConfig(INDEX_DIST_BUSYSLEEP , "0")),
            Long.parseLong(getConfig(INDEX_DIST_MEMPREREQ , "1000000")));

        // test routine for snippet fetch
        //Set query = new HashSet();
        //query.add(plasmaWordIndexEntry.word2hash("Weitergabe"));
        //query.add(plasmaWordIndexEntry.word2hash("Zahl"));
        //plasmaSnippetCache.result scr = snippetCache.retrieve(new URL("http://www.heise.de/mobil/newsticker/meldung/mail/54980"), query, true);
        //plasmaSnippetCache.result scr = snippetCache.retrieve(new URL("http://www.heise.de/security/news/foren/go.shtml?read=1&msg_id=7301419&forum_id=72721"), query, true);
        //plasmaSnippetCache.result scr = snippetCache.retrieve(new URL("http://www.heise.de/kiosk/archiv/ct/2003/4/20"), query, true, 260);

        this.dbImportManager = new dbImportManager(this);
        
        log.logConfig("Finished Switchboard Initialization");
    }
    
    public void initMessages() {
        this.log.logConfig("Starting Message Board");
        File messageDbFile = new File(workPath, DBFILE_MESSAGE);
        this.messageDB = new messageBoard(messageDbFile);
        this.log.logConfig("Loaded Message Board DB from file " + messageDbFile.getName() +
        ", " + this.messageDB.size() + " entries" +
        ", " + ppRamString(messageDbFile.length()/1024));
    }
    
    public void initWiki() {
        this.log.logConfig("Starting Wiki Board");
        File wikiDbFile = new File(workPath, DBFILE_WIKI);
        this.wikiDB = new wikiBoard(wikiDbFile, new File(workPath, DBFILE_WIKI_BKP));
        this.log.logConfig("Loaded Wiki Board DB from file " + wikiDbFile.getName() +
        ", " + this.wikiDB.size() + " entries" +
        ", " + ppRamString(wikiDbFile.length()/1024));
    }
    
    public void initBlog() {
        this.log.logConfig("Starting Blog");
        File blogDbFile = new File(workPath, DBFILE_BLOG);
        this.blogDB = new blogBoard(blogDbFile);
        this.log.logConfig("Loaded Blog DB from file " + blogDbFile.getName() +
        ", " + this.blogDB.size() + " entries" +
        ", " + ppRamString(blogDbFile.length()/1024));

        File blogCommentDbFile = new File(workPath, DBFILE_BLOGCOMMENTS);
        this.blogCommentDB = new blogBoardComments(blogCommentDbFile);
        this.log.logConfig("Loaded Blog-Comment DB from file " + blogCommentDbFile.getName() +
        ", " + this.blogCommentDB.size() + " entries" +
        ", " + ppRamString(blogCommentDbFile.length()/1024));
    }
    
    public void initBookmarks(){
        this.log.logConfig("Loading Bookmarks DB");
        File bookmarksFile = new File(workPath, DBFILE_BOOKMARKS);
        File tagsFile = new File(workPath, DBFILE_BOOKMARKS_TAGS);
        File datesFile = new File(workPath, DBFILE_BOOKMARKS_DATES);
        this.bookmarksDB = new bookmarksDB(bookmarksFile, tagsFile, datesFile);
        this.log.logConfig("Loaded Bookmarks DB from files "+ bookmarksFile.getName()+ ", "+tagsFile.getName());
        this.log.logConfig(this.bookmarksDB.tagsSize()+" Tag, "+this.bookmarksDB.bookmarksSize()+" Bookmarks");
    }
    
    public static plasmaSwitchboard getSwitchboard(){
        return sb;
    }

    public boolean isRobinsonMode() {
    	// we are in robinson mode, if we do not exchange index by dht distribution
    	// we need to take care that search requests and remote indexing requests go only
    	// to the peers in the same cluster, if we run a robinson cluster.
    	return !getConfigBool(plasmaSwitchboard.INDEX_DIST_ALLOW, false) && !getConfigBool(plasmaSwitchboard.INDEX_RECEIVE_ALLOW, false);
    }

    public boolean isPublicRobinson() {
    	// robinson peers may be member of robinson clusters, which can be public or private
    	// this does not check the robinson attribute, only the specific subtype of the cluster
    	String clustermode = getConfig(CLUSTER_MODE, CLUSTER_MODE_PUBLIC_PEER);
    	return (clustermode.equals(CLUSTER_MODE_PUBLIC_CLUSTER)) || (clustermode.equals(CLUSTER_MODE_PUBLIC_PEER));
    }
    
    public boolean isInMyCluster(String peer) {
    	// check if the given peer is in the own network, if this is a robinson cluster
    	// depending on the robinson cluster type, the peer String may be a peerhash (b64-hash)
    	// or a ip:port String or simply a ip String
    	// if this robinson mode does not define a cluster membership, false is returned
        if (peer == null) return false;
    	if (!isRobinsonMode()) return false;
    	String clustermode = getConfig(CLUSTER_MODE, CLUSTER_MODE_PUBLIC_PEER);
    	if (clustermode.equals(CLUSTER_MODE_PRIVATE_CLUSTER)) {
    		// check if we got the request from a peer in the private cluster
    		String network = getConfig(CLUSTER_PEERS_IPPORT, "");
            return network.indexOf(peer) >= 0;
    	} else if (clustermode.equals(CLUSTER_MODE_PUBLIC_CLUSTER)) {
    		// check if we got the request from a peer in the public cluster
            return this.clusterhashes.containsKey(peer);
    	} else {
    		return false;
    	}
    }
    
    public boolean isInMyCluster(yacySeed seed) {
    	// check if the given peer is in the own network, if this is a robinson cluster
    	// if this robinson mode does not define a cluster membership, false is returned
    	if (seed == null) return false;
		if (!isRobinsonMode()) return false;
    	String clustermode = getConfig(CLUSTER_MODE, CLUSTER_MODE_PUBLIC_PEER);
    	if (clustermode.equals(CLUSTER_MODE_PRIVATE_CLUSTER)) {
    		// check if we got the request from a peer in the private cluster
    		String network = getConfig(CLUSTER_PEERS_IPPORT, "");
            return network.indexOf(seed.getPublicAddress()) >= 0;
    	} else if (clustermode.equals(CLUSTER_MODE_PUBLIC_CLUSTER)) {
    	    // check if we got the request from a peer in the public cluster
            return this.clusterhashes.containsKey(seed.hash);
    	} else {
    		return false;
    	}
    }
   
    /**
     * Test a url if it can be used for crawling/indexing
     * This mainly checks if the url is in the declared domain (local/global)
     * @param url
     * @return null if the url can be accepted, a string containing a rejection reason if the url cannot be accepted
     */
    public String acceptURL(yacyURL url) {
        // returns true if the url can be accepted accoring to network.unit.domain
        if (url == null) return "url is null";
        String host = url.getHost();
        if (host == null) return "url.host is null";
        if (this.acceptGlobalURLs && this.acceptLocalURLs) return null; // fast shortcut to avoid dnsResolve
        InetAddress hostAddress = serverDomains.dnsResolve(host);
        // if we don't know the host, we cannot load that resource anyway.
        // But in case we use a proxy, it is possible that we dont have a DNS service.
        final httpRemoteProxyConfig remoteProxyConfig = httpdProxyHandler.getRemoteProxyConfig();
        if (hostAddress == null) {
            if ((remoteProxyConfig != null) && (remoteProxyConfig.useProxy())) return null; else return "the dns of the host '" + host + "' cannot be resolved";
        }
        // check if this is a local address and we are allowed to index local pages:
        boolean local = hostAddress.isSiteLocalAddress() || hostAddress.isLoopbackAddress();
        //assert local == yacyURL.isLocalDomain(url.hash()); // TODO: remove the dnsResolve above!
        if ((this.acceptGlobalURLs && !local) || (this.acceptLocalURLs && local)) return null;
        return (local) ?
            ("the host '" + host + "' is local, but local addresses are not accepted") :
            ("the host '" + host + "' is global, but global addresses are not accepted");
    }
    
    public String urlExists(String hash) {
        // tests if hash occurrs in any database
        // if it exists, the name of the database is returned,
        // if it not exists, null is returned
        if (wordIndex.existsURL(hash)) return "loaded";
        return this.crawlQueues.urlExists(hash);
    }
    
    public void urlRemove(String hash) {
        wordIndex.removeURL(hash);
        crawlResults.remove(hash);
        crawlQueues.urlRemove(hash);
    }
    
    public yacyURL getURL(String urlhash) {
        if (urlhash == null) return null;
        if (urlhash.equals(yacyURL.dummyHash)) return null;
        yacyURL ne = crawlQueues.getURL(urlhash);
        if (ne != null) return ne;
        indexURLReference le = wordIndex.getURL(urlhash, null, 0);
        if (le != null) return le.comp().url();
        return null;
    }
    
    public plasmaSearchRankingProfile getRanking() {
        return (getConfig("rankingProfile", "").length() == 0) ?
                  new plasmaSearchRankingProfile(plasmaSearchQuery.CONTENTDOM_TEXT) :
                  new plasmaSearchRankingProfile("", crypt.simpleDecode(sb.getConfig("rankingProfile", ""), null));
    }
    
    /**
     * This method changes the HTCache size.<br>
     * @param newCacheSize in MB
     */
    public final void setCacheSize(long newCacheSize) {
        plasmaHTCache.setCacheSize(1048576 * newCacheSize);
    }
    
    public boolean onlineCaution() {
        return
           (System.currentTimeMillis() - this.proxyLastAccess < Integer.parseInt(getConfig(PROXY_ONLINE_CAUTION_DELAY, "30000"))) ||
           (System.currentTimeMillis() - this.localSearchLastAccess < Integer.parseInt(getConfig(LOCALSEACH_ONLINE_CAUTION_DELAY, "30000"))) ||
           (System.currentTimeMillis() - this.remoteSearchLastAccess < Integer.parseInt(getConfig(REMOTESEARCH_ONLINE_CAUTION_DELAY, "30000")));
    }
    
    private static String ppRamString(long bytes) {
        if (bytes < 1024) return bytes + " KByte";
        bytes = bytes / 1024;
        if (bytes < 1024) return bytes + " MByte";
        bytes = bytes / 1024;
        if (bytes < 1024) return bytes + " GByte";
        return (bytes / 1024) + "TByte";
    }

    private void initActiveCrawlProfiles() {
        this.defaultProxyProfile = null;
        this.defaultRemoteProfile = null;
        this.defaultTextSnippetLocalProfile = null;
        this.defaultTextSnippetGlobalProfile = null;
        this.defaultMediaSnippetLocalProfile = null;
        this.defaultMediaSnippetGlobalProfile = null;
        Iterator<plasmaCrawlProfile.entry> i = this.profilesActiveCrawls.profiles(true);
        plasmaCrawlProfile.entry profile;
        String name;
        while (i.hasNext()) {
            profile = i.next();
            name = profile.name();
            if (name.equals(CRAWL_PROFILE_PROXY)) this.defaultProxyProfile = profile;
            if (name.equals(CRAWL_PROFILE_REMOTE)) this.defaultRemoteProfile = profile;
            if (name.equals(CRAWL_PROFILE_SNIPPET_LOCAL_TEXT)) this.defaultTextSnippetLocalProfile = profile;
            if (name.equals(CRAWL_PROFILE_SNIPPET_GLOBAL_TEXT)) this.defaultTextSnippetGlobalProfile = profile;
            if (name.equals(CRAWL_PROFILE_SNIPPET_LOCAL_MEDIA)) this.defaultMediaSnippetLocalProfile = profile;
            if (name.equals(CRAWL_PROFILE_SNIPPET_GLOBAL_MEDIA)) this.defaultMediaSnippetGlobalProfile = profile;
        }
        if (this.defaultProxyProfile == null) {
            // generate new default entry for proxy crawling
            this.defaultProxyProfile = this.profilesActiveCrawls.newEntry("proxy", null, ".*", ".*",
                    Integer.parseInt(getConfig(PROXY_PREFETCH_DEPTH, "0")),
                    Integer.parseInt(getConfig(PROXY_PREFETCH_DEPTH, "0")),
                    60 * 24, -1, -1, false,
                    getConfigBool(PROXY_INDEXING_LOCAL_TEXT, true),
                    getConfigBool(PROXY_INDEXING_LOCAL_MEDIA, true),
                    true, true,
                    getConfigBool(PROXY_INDEXING_REMOTE, false), true, true, true);
        }
        if (this.defaultRemoteProfile == null) {
            // generate new default entry for remote crawling
            defaultRemoteProfile = this.profilesActiveCrawls.newEntry(CRAWL_PROFILE_REMOTE, null, ".*", ".*", 0, 0,
                    -1, -1, -1, true, true, true, false, true, false, true, true, false);
        }
        if (this.defaultTextSnippetLocalProfile == null) {
            // generate new default entry for snippet fetch and optional crawling
            defaultTextSnippetLocalProfile = this.profilesActiveCrawls.newEntry(CRAWL_PROFILE_SNIPPET_LOCAL_TEXT, null, ".*", ".*", 0, 0,
                    60 * 24 * 30, -1, -1, true, false, false, false, false, false, true, true, false);
        }
        if (this.defaultTextSnippetGlobalProfile == null) {
            // generate new default entry for snippet fetch and optional crawling
            defaultTextSnippetGlobalProfile = this.profilesActiveCrawls.newEntry(CRAWL_PROFILE_SNIPPET_GLOBAL_TEXT, null, ".*", ".*", 0, 0,
                    60 * 24 * 30, -1, -1, true, true, true, true, true, false, true, true, false);
        }
        if (this.defaultMediaSnippetLocalProfile == null) {
            // generate new default entry for snippet fetch and optional crawling
            defaultMediaSnippetLocalProfile = this.profilesActiveCrawls.newEntry(CRAWL_PROFILE_SNIPPET_LOCAL_MEDIA, null, ".*", ".*", 0, 0,
                    60 * 24 * 30, -1, -1, true, false, false, false, false, false, true, true, false);
        }
        if (this.defaultMediaSnippetGlobalProfile == null) {
            // generate new default entry for snippet fetch and optional crawling
            defaultMediaSnippetGlobalProfile = this.profilesActiveCrawls.newEntry(CRAWL_PROFILE_SNIPPET_GLOBAL_MEDIA, null, ".*", ".*", 0, 0,
                    60 * 24 * 30, -1, -1, true, false, true, true, true, false, true, true, false);
        }
    }

    private void resetProfiles() {
        final File pdb = new File(plasmaPath, DBFILE_ACTIVE_CRAWL_PROFILES);
        if (pdb.exists()) pdb.delete();
        profilesActiveCrawls = new plasmaCrawlProfile(pdb);
        initActiveCrawlProfiles();
    }
    
    /**
     * {@link plasmaCrawlProfile Crawl Profiles} are saved independantly from the queues themselves
     * and therefore have to be cleaned up from time to time. This method only performs the clean-up
     * if - and only if - the {@link plasmaSwitchboardQueue switchboard},
     * {@link plasmaProtocolLoader loader} and {@link plasmaCrawlNURL local crawl} queues are all empty.
     * <p>
     *   Then it iterates through all existing {@link plasmaCrawlProfile crawl profiles} and removes
     *   all profiles which are not hardcoded.
     * </p>
     * <p>
     *   <i>If this method encounters DB-failures, the profile DB will be resetted and</i>
     *   <code>true</code><i> will be returned</i>
     * </p>
     * @see #CRAWL_PROFILE_PROXY hardcoded
     * @see #CRAWL_PROFILE_REMOTE hardcoded
     * @see #CRAWL_PROFILE_SNIPPET_TEXT hardcoded
     * @see #CRAWL_PROFILE_SNIPPET_MEDIA hardcoded
     * @return whether this method has done something or not (i.e. because the queues have been filled
     * or there are no profiles left to clean up)
     * @throws <b>InterruptedException</b> if the current thread has been interrupted, i.e. by the
     * shutdown procedure
     */
    public boolean cleanProfiles() throws InterruptedException {
        if ((sbQueue.size() > 0) || (crawlQueues.size() > 0) ||
                (crawlStacker != null && crawlStacker.size() > 0) ||
                (crawlQueues.noticeURL.notEmpty())) 
            return false;
        final Iterator<plasmaCrawlProfile.entry> iter = profilesActiveCrawls.profiles(true);
        plasmaCrawlProfile.entry entry;
        boolean hasDoneSomething = false;
        try {
            while (iter.hasNext()) {
                // check for interruption
                if (Thread.currentThread().isInterrupted()) throw new InterruptedException("Shutdown in progress");
                
                // getting next profile
                entry = iter.next();
                if (!((entry.name().equals(CRAWL_PROFILE_PROXY))  ||
                      (entry.name().equals(CRAWL_PROFILE_REMOTE)) ||
                      (entry.name().equals(CRAWL_PROFILE_SNIPPET_LOCAL_TEXT))  ||
                      (entry.name().equals(CRAWL_PROFILE_SNIPPET_GLOBAL_TEXT)) ||
                      (entry.name().equals(CRAWL_PROFILE_SNIPPET_LOCAL_MEDIA)) ||
                      (entry.name().equals(CRAWL_PROFILE_SNIPPET_GLOBAL_MEDIA)))) {
                    profilesPassiveCrawls.newEntry(entry.map());
                    iter.remove();
                    hasDoneSomething = true;
                }
            }
        } catch (kelondroException e) {
            resetProfiles();
            hasDoneSomething = true;
        }
        return hasDoneSomething;
    }
    
    public boolean htEntryStoreProcess(plasmaHTCache.Entry entry) {
        
        if (entry == null) return false;

        /* =========================================================================
         * PARSER SUPPORT
         * 
         * Testing if the content type is supported by the available parsers
         * ========================================================================= */
        boolean isSupportedContent = plasmaParser.supportedContent(entry.url(),entry.getMimeType());
        
        /* =========================================================================
         * INDEX CONTROL HEADER
         * 
         * With the X-YACY-Index-Control header set to "no-index" a client could disallow
         * yacy to index the response returned as answer to a request
         * ========================================================================= */
        boolean doIndexing = true;        
        if (entry.requestProhibitsIndexing()) {        
            doIndexing = false;
            if (this.log.isFine())
                this.log.logFine("Crawling of " + entry.url() + " prohibited by request.");
        }        
        
        /* =========================================================================
         * LOCAL IP ADDRESS CHECK
         * 
         * check if ip is local ip address // TODO: remove this procotol specific code here
         * ========================================================================= */
        String urlRejectReason = acceptURL(entry.url());
        if (urlRejectReason != null) {
            if (this.log.isFine()) this.log.logFine("Rejected URL '" + entry.url() + "': " + urlRejectReason);
            doIndexing = false;
        }
        
        synchronized (sbQueue) {
        /* =========================================================================
         * STORING DATA
         * 
         * Now we store the response header and response content if 
         * a) the user has configured to use the htcache or
         * b) the content should be indexed
         * ========================================================================= */        
        if (((entry.profile() != null) && (entry.profile().storeHTCache())) || (doIndexing && isSupportedContent)) {
            // store response header            
            if (entry.writeResourceInfo()) {
                this.log.logInfo("WROTE HEADER for " + entry.cacheFile());
            }        
            
            // work off unwritten files
            if (entry.cacheArray() == null)  {
                //this.log.logFine("EXISTING FILE (" + entry.cacheFile.length() + " bytes) for " + entry.cacheFile);
            } else {
                String error = entry.shallStoreCacheForProxy();
                if (error == null) {
                    plasmaHTCache.writeResourceContent(entry.url(), entry.cacheArray());
                    if (this.log.isFine()) this.log.logFine("WROTE FILE (" + entry.cacheArray().length + " bytes) for " + entry.cacheFile());
                } else {
                    if (this.log.isFine()) this.log.logFine("WRITE OF FILE " + entry.cacheFile() + " FORBIDDEN: " + error);
                }
            }
        }
        
        /* =========================================================================
         * INDEXING
         * ========================================================================= */          
        if (doIndexing && isSupportedContent) {
            
            // enqueue for further crawling
            enQueue(this.sbQueue.newEntry(
                    entry.url(), 
                    (entry.referrerURL() == null) ? null : entry.referrerURL().hash(),
                    entry.ifModifiedSince(), 
                    entry.requestWithCookie(),
                    entry.initiator(), 
                    entry.depth(), 
                    entry.profile().handle(),
                    entry.name()
            ));
        } else {
            if (!entry.profile().storeHTCache() && entry.cacheFile().exists()) {
                plasmaHTCache.deleteURLfromCache(entry.url());                
            }
        }
        }
        
        return true;
    }
    
    public boolean htEntryStoreJob() {
        if (plasmaHTCache.empty()) return false;
        return htEntryStoreProcess(plasmaHTCache.pop());
    }
    
    public int htEntrySize() {
        return plasmaHTCache.size();
    }
    
    public void close() {
        log.logConfig("SWITCHBOARD SHUTDOWN STEP 1: sending termination signal to managed threads:");
        serverProfiling.stopSystemProfiling();
        moreMemory.cancel();
        terminateAllThreads(true);
        if (transferIdxThread != null) stopTransferWholeIndex(false);
        log.logConfig("SWITCHBOARD SHUTDOWN STEP 2: sending termination signal to threaded indexing");
        // closing all still running db importer jobs
        indexingDocumentProcessor.shutdown(4000);
        indexingCondensementProcessor.shutdown(3000);
        indexingAnalysisProcessor.shutdown(2000);
        indexingStorageProcessor.shutdown(1000);
        this.dbImportManager.close();
        JakartaCommonsHttpClient.closeAllConnections();
        wikiDB.close();
        blogDB.close();
        blogCommentDB.close();
        userDB.close();
        bookmarksDB.close();
        messageDB.close();
        if (facilityDB != null) facilityDB.close();
        crawlStacker.close();
        profilesActiveCrawls.close();
        robots.close();
        parser.close();
        plasmaHTCache.close();
        sbQueue.close();
        webStructure.flushCitationReference("crg");
        webStructure.close();
        crawlQueues.close();
        log.logConfig("SWITCHBOARD SHUTDOWN STEP 3: sending termination signal to database manager (stand by...)");
        wordIndex.close();
        yc.close();
        log.logConfig("SWITCHBOARD SHUTDOWN TERMINATED");
    }
    
    public int queueSize() {
        return sbQueue.size();
    }
    
    public void enQueue(plasmaSwitchboardQueue.QueueEntry job) {
        assert job != null;
        if (!(job instanceof plasmaSwitchboardQueue.QueueEntry)) {
            System.out.println("Internal error at plasmaSwitchboard.enQueue: wrong job type");
            System.exit(0);
        }
        try {
            sbQueue.push((plasmaSwitchboardQueue.QueueEntry) job);
        } catch (IOException e) {
            log.logSevere("IOError in plasmaSwitchboard.enQueue: " + e.getMessage(), e);
        }
    }
    
    public void deQueueFreeMem() {
        // flush some entries from the RAM cache
        wordIndex.flushCacheSome();
        // adopt maximum cache size to current size to prevent that further OutOfMemoryErrors occur
/*      int newMaxCount = Math.max(1200, Math.min((int) getConfigLong(WORDCACHE_MAX_COUNT, 1200), wordIndex.dhtOutCacheSize()));
        setConfig(WORDCACHE_MAX_COUNT, Integer.toString(newMaxCount));
        wordIndex.setMaxWordCount(newMaxCount); */
    }
    
    public plasmaSwitchboardQueue.QueueEntry deQueue() {
        // getting the next entry from the indexing queue
        plasmaSwitchboardQueue.QueueEntry nextentry = null;
        synchronized (sbQueue) {
            // do one processing step
            if (this.log.isFine()) log.logFine("DEQUEUE: sbQueueSize=" + sbQueue.size() +
                    ", coreStackSize=" + crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_CORE) +
                    ", limitStackSize=" + crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_LIMIT) +
                    ", overhangStackSize=" + crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_OVERHANG) +
                    ", remoteStackSize=" + crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_REMOTE));
            try {
                int sizeBefore = sbQueue.size();
                nextentry = sbQueue.pop();
                if (nextentry == null) {
                    log.logWarning("deQueue: null entry on queue stack.");
                    if (sbQueue.size() == sizeBefore) {
                        // this is a severe problem: because this time a null is returned, it means that this status will last forever
                        // to re-enable use of the sbQueue, it must be emptied completely
                        log.logSevere("deQueue: does not shrink after pop() == null. Emergency reset.");
                        sbQueue.clear();
                    }
                    return null;
                }
            } catch (IOException e) {
                log.logSevere("IOError in plasmaSwitchboard.deQueue: " + e.getMessage(), e);
                return null;
            }
            return nextentry;
        }
    }
    
    public boolean deQueueProcess() {
        try {
            // work off fresh entries from the proxy or from the crawler
            if (onlineCaution()) {
                if (this.log.isFine()) log.logFine("deQueue: online caution, omitting resource stack processing");
                return false;
            }
            
            boolean doneSomething = false;
 
            // flush some entries from the RAM cache
            if (sbQueue.size() == 0) {
                doneSomething = wordIndex.flushCacheSome() > 0; // permanent flushing only if we are not busy
            }
            
            // possibly delete entries from last chunk
            if ((this.dhtTransferChunk != null) && (this.dhtTransferChunk.getStatus() == plasmaDHTChunk.chunkStatus_COMPLETE)) {
                String deletedURLs = this.dhtTransferChunk.deleteTransferIndexes();
                if (this.log.isFine()) this.log.logFine("Deleted from " + this.dhtTransferChunk.containers().length + " transferred RWIs locally, removed " + deletedURLs + " URL references");
                this.dhtTransferChunk = null;
            }

            // generate a dht chunk
            if ((dhtShallTransfer() == null) && (
                    (this.dhtTransferChunk == null) ||
                    (this.dhtTransferChunk.getStatus() == plasmaDHTChunk.chunkStatus_UNDEFINED) ||
                    // (this.dhtTransferChunk.getStatus() == plasmaDHTChunk.chunkStatus_COMPLETE) ||
                    (this.dhtTransferChunk.getStatus() == plasmaDHTChunk.chunkStatus_FAILED)
               )) {
                // generate new chunk
                int minChunkSize = (int) getConfigLong(INDEX_DIST_CHUNK_SIZE_MIN, 30);
                dhtTransferChunk = new plasmaDHTChunk(this.log, wordIndex, minChunkSize, dhtTransferIndexCount, 5000);
                doneSomething = true;
            }

            // check for interruption
            checkInterruption();

            // getting the next entry from the indexing queue
            if (sbQueue.size() == 0) {
                //log.logFine("deQueue: nothing to do, queue is emtpy");
                return doneSomething; // nothing to do
            }

            if (crawlStacker.size() >= getConfigLong(CRAWLSTACK_SLOTS, 2000)) {
                if (this.log.isFine()) log.logFine("deQueue: too many processes in stack crawl thread queue (" + "stackCrawlQueue=" + crawlStacker.size() + ")");
                return doneSomething;
            }

            // if we were interrupted we should return now
            if (Thread.currentThread().isInterrupted()) {
                if (this.log.isFine()) log.logFine("deQueue: thread was interrupted");
                return false;
            }
            
            // get next queue entry and start a queue processing
            plasmaSwitchboardQueue.QueueEntry queueEntry = deQueue();
            assert queueEntry != null;
            if (queueEntry == null) return true;
            if (queueEntry.profile() == null) {
                queueEntry.close();
                return true;
            }
            sbQueue.enQueueToActive(queueEntry);
            
            // check for interruption
            checkInterruption();

            this.indexingDocumentProcessor.enQueue(new indexingQueueEntry(queueEntry, null, null));
            /*
            
            // THE FOLLOWING CAN BE CONCURRENT ->
            
            // parse and index the resource
            indexingQueueEntry document = parseDocument(new indexingQueueEntry(queueEntry, null, null));
            
            // do condensing
            indexingQueueEntry condensement = condenseDocument(document);
            
            // do a web structure analysis
            indexingQueueEntry analysis = webStructureAnalysis(condensement);
            
            // <- CONCURRENT UNTIL HERE, THEN SERIALIZE AGAIN
            
            // store the result
            storeDocumentIndex(analysis);
            */
            return true;
        } catch (InterruptedException e) {
            log.logInfo("DEQUEUE: Shutdown detected.");
            return false;
        }
    }
    
    public static class indexingQueueEntry extends serverProcessorJob {
        public plasmaSwitchboardQueue.QueueEntry queueEntry;
        public plasmaParserDocument document;
        public plasmaCondenser condenser;
        public indexingQueueEntry(
                plasmaSwitchboardQueue.QueueEntry queueEntry,
                plasmaParserDocument document,
                plasmaCondenser condenser) {
            super();
            this.queueEntry = queueEntry;
            this.document = document;
            this.condenser = condenser;
        }
    }
    
    public int cleanupJobSize() {
        int c = 0;
        if ((crawlQueues.delegatedURL.stackSize() > 1000)) c++;
        if ((crawlQueues.errorURL.stackSize() > 1000)) c++;
        for (int i = 1; i <= 6; i++) {
            if (crawlResults.getStackSize(i) > 1000) c++;
        }
        return c;
    }
    
    public boolean cleanupJob() {
        try {
            boolean hasDoneSomething = false;
            
            // close unused connections
            JakartaCommonsHttpClient.cleanup();

            // do transmission of CR-files
            checkInterruption();
            int count = rankingOwnDistribution.size() / 100;
            if (count == 0) count = 1;
            if (count > 5) count = 5;
            if (rankingOn) {
                rankingOwnDistribution.transferRanking(count);
                rankingOtherDistribution.transferRanking(1);
            }
            
            // clean up delegated stack
            checkInterruption();
            if ((crawlQueues.delegatedURL.stackSize() > 1000)) {
                if (this.log.isFine()) log.logFine("Cleaning Delegated-URLs report stack, " + crawlQueues.delegatedURL.stackSize() + " entries on stack");
                crawlQueues.delegatedURL.clearStack();
                hasDoneSomething = true;
            }
            
            // clean up error stack
            checkInterruption();
            if ((crawlQueues.errorURL.stackSize() > 1000)) {
                if (this.log.isFine()) log.logFine("Cleaning Error-URLs report stack, " + crawlQueues.errorURL.stackSize() + " entries on stack");
                crawlQueues.errorURL.clearStack();
                hasDoneSomething = true;
            }
            
            // clean up loadedURL stack
            for (int i = 1; i <= 6; i++) {
                checkInterruption();
                if (crawlResults.getStackSize(i) > 1000) {
                    if (this.log.isFine()) log.logFine("Cleaning Loaded-URLs report stack, " + crawlResults.getStackSize(i) + " entries on stack " + i);
                    crawlResults.clearStack(i);
                    hasDoneSomething = true;
                }
            }
            // clean up image stack
            plasmaCrawlResultImages.clearQueues();
            
            // clean up profiles
            checkInterruption();
            if (cleanProfiles()) hasDoneSomething = true;

            // clean up news
            checkInterruption();
            try {                
                if (this.log.isFine()) log.logFine("Cleaning Incoming News, " + yacyCore.newsPool.size(yacyNewsPool.INCOMING_DB) + " entries on stack");
                if (yacyCore.newsPool.automaticProcess() > 0) hasDoneSomething = true;
            } catch (IOException e) {}
            if (getConfigBool("cleanup.deletionProcessedNews", true)) {
                yacyCore.newsPool.clear(yacyNewsPool.PROCESSED_DB);
            }
            if (getConfigBool("cleanup.deletionPublishedNews", true)) {
                yacyCore.newsPool.clear(yacyNewsPool.PUBLISHED_DB);
            }
            
            // clean up seed-dbs
            if(getConfigBool("routing.deleteOldSeeds.permission",true)) {
            	final long deleteOldSeedsTime = getConfigLong("routing.deleteOldSeeds.time",7)*24*3600000;
                Iterator<yacySeed> e = yacyCore.seedDB.seedsSortedDisconnected(true,yacySeed.LASTSEEN);
                yacySeed seed = null;
                ArrayList<String> deleteQueue = new ArrayList<String>();
                checkInterruption();
                //clean passive seeds
                while(e.hasNext()) {
                	seed = e.next();
                	if(seed != null) {
                		//list is sorted -> break when peers are too young to delete
                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-deleteOldSeedsTime))
                				break;
                		deleteQueue.add(seed.hash);
                	}
                }
                for(int i=0;i<deleteQueue.size();++i) yacyCore.seedDB.removeDisconnected((String)deleteQueue.get(i));
                deleteQueue.clear();
                e = yacyCore.seedDB.seedsSortedPotential(true,yacySeed.LASTSEEN);
                checkInterruption();
                //clean potential seeds
                while(e.hasNext()) {
                	seed = (yacySeed)e.next();
                	if(seed != null) {
                		//list is sorted -> break when peers are too young to delete
                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-deleteOldSeedsTime))
                				break;
                		deleteQueue.add(seed.hash);
                	}
                }
                for (int i = 0; i < deleteQueue.size(); ++i) yacyCore.seedDB.removePotential((String)deleteQueue.get(i));
            }
            
            // check if update is available and
            // if auto-update is activated perform an automatic installation and restart
            yacyVersion updateVersion = yacyVersion.rulebasedUpdateInfo(false);
            if (updateVersion != null) {
                // there is a version that is more recent. Load it and re-start with it
                log.logInfo("AUTO-UPDATE: downloading more recent release " + updateVersion.url);
                File downloaded = yacyVersion.downloadRelease(updateVersion);
                boolean devenvironment = yacyVersion.combined2prettyVersion(sb.getConfig("version","0.1")).startsWith("dev");
                if (devenvironment) {
                    log.logInfo("AUTO-UPDATE: omiting update because this is a development environment");
                } else if ((downloaded == null) || (!downloaded.exists()) || (downloaded.length() == 0)) {
                    log.logInfo("AUTO-UPDATE: omiting update because download failed (file cannot be found or is too small)");
                } else {
                    yacyVersion.deployRelease(downloaded);
                    terminate(5000);
                    log.logInfo("AUTO-UPDATE: deploy and restart initiated");
                }
            }
            
            // initiate broadcast about peer startup to spread supporter url
            if (yacyCore.newsPool.size(yacyNewsPool.OUTGOING_DB) == 0) {
                // read profile
                final Properties profile = new Properties();
                FileInputStream fileIn = null;
                try {
                    fileIn = new FileInputStream(new File("DATA/SETTINGS/profile.txt"));
                    profile.load(fileIn);
                } catch(IOException e) {
                } finally {
                    if (fileIn != null) try { fileIn.close(); } catch (Exception e) {}
                }
                String homepage = (String) profile.get("homepage");
                if ((homepage != null) && (homepage.length() > 10)) {
                    Properties news = new Properties();
                    news.put("homepage", profile.get("homepage"));
                    yacyCore.newsPool.publishMyNews(yacyNewsRecord.newRecord(yacyNewsPool.CATEGORY_PROFILE_BROADCAST, news));
                }
            }
/*
            // set a maximum amount of memory for the caches
            // long memprereq = Math.max(getConfigLong(INDEXER_MEMPREREQ, 0), wordIndex.minMem());
            // setConfig(INDEXER_MEMPREREQ, memprereq);
            // setThreadPerformance(INDEXER, getConfigLong(INDEXER_IDLESLEEP, 0), getConfigLong(INDEXER_BUSYSLEEP, 0), memprereq);
            kelondroCachedRecords.setCacheGrowStati(40 * 1024 * 1024, 20 * 1024 * 1024);
            kelondroCache.setCacheGrowStati(40 * 1024 * 1024, 20 * 1024 * 1024);
*/
            // update the cluster set
            this.clusterhashes = yacyCore.seedDB.clusterHashes(getConfig("cluster.peers.yacydomain", ""));
            
            return hasDoneSomething;
        } catch (InterruptedException e) {
            this.log.logInfo("cleanupJob: Shutdown detected");
            return false;
        }
    }
    
    /**
     * Creates a new File instance with absolute path of ours Seed File.<br>
     * @return a new File instance
     */
    public File getOwnSeedFile() {
        return getConfigPath(OWN_SEED_FILE, DBFILE_OWN_SEED);
    }
    
    /**
     * With this function the crawling process can be paused
     * @param jobType 
     */
    public void pauseCrawlJob(String jobType) {
        Object[] status = (Object[])this.crawlJobsStatus.get(jobType);
        synchronized(status[CRAWLJOB_SYNC]) {
            status[CRAWLJOB_STATUS] = Boolean.TRUE;
        }
        setConfig(jobType + "_isPaused", "true");
    }  
    
    /**
     * Continue the previously paused crawling
     * @param jobType 
     */
    public void continueCrawlJob(String jobType) {
        Object[] status = (Object[])this.crawlJobsStatus.get(jobType);
        synchronized(status[CRAWLJOB_SYNC]) {
            if (((Boolean)status[CRAWLJOB_STATUS]).booleanValue()) {
                status[CRAWLJOB_STATUS] = Boolean.FALSE;
                status[CRAWLJOB_SYNC].notifyAll();
            }
        }
        setConfig(jobType + "_isPaused", "false");
    } 
    
    /**
     * @param jobType 
     * @return <code>true</code> if crawling was paused or <code>false</code> otherwise
     */
    public boolean crawlJobIsPaused(String jobType) {
        Object[] status = (Object[])this.crawlJobsStatus.get(jobType);
        synchronized(status[CRAWLJOB_SYNC]) {
            return ((Boolean)status[CRAWLJOB_STATUS]).booleanValue();
        }
    }
    
    public indexingQueueEntry parseDocument(indexingQueueEntry in) {
        in.queueEntry.updateStatus(plasmaSwitchboardQueue.QUEUE_STATE_PARSING);
        plasmaParserDocument document = null;
        try {
            document = parseDocument(in.queueEntry);
        } catch (InterruptedException e) {
            document = null;
        }
        if (document == null) {
            in.queueEntry.close();
            return null;
        }
        return new indexingQueueEntry(in.queueEntry, document, null);
    }
    
    private plasmaParserDocument parseDocument(plasmaSwitchboardQueue.QueueEntry entry) throws InterruptedException {
        plasmaParserDocument document = null;
        int processCase = entry.processCase();
        
        if (this.log.isFine()) log.logFine("processResourceStack processCase=" + processCase +
                ", depth=" + entry.depth() +
                ", maxDepth=" + ((entry.profile() == null) ? "null" : Integer.toString(entry.profile().generalDepth())) +
                ", filter=" + ((entry.profile() == null) ? "null" : entry.profile().generalFilter()) +
                ", initiatorHash=" + entry.initiator() +
                //", responseHeader=" + ((entry.responseHeader() == null) ? "null" : entry.responseHeader().toString()) +
                ", url=" + entry.url()); // DEBUG
        
        // PARSE CONTENT
        long parsingStartTime = System.currentTimeMillis();

        try {
            // parse the document
            document = parser.parseSource(entry.url(), entry.getMimeType(), entry.getCharacterEncoding(), entry.cacheFile());
            assert(document != null) : "Unexpected error. Parser returned null.";
            if (document == null) return null;
        } catch (ParserException e) {
            this.log.logInfo("Unable to parse the resource '" + entry.url() + "'. " + e.getMessage());
            addURLtoErrorDB(entry.url(), entry.referrerHash(), entry.initiator(), entry.anchorName(), e.getErrorCode(), new kelondroBitfield());
            if (document != null) {
                document.close();
                document = null;
            }
            return null;
        }
        
        long parsingEndTime = System.currentTimeMillis();            
        
        // get the document date
        Date docDate = entry.getModificationDate();
        
        // put anchors on crawl stack
        long stackStartTime = System.currentTimeMillis();
        if (
                ((processCase == PROCESSCASE_4_PROXY_LOAD) || (processCase == PROCESSCASE_5_LOCAL_CRAWLING)) &&
                ((entry.profile() == null) || (entry.depth() < entry.profile().generalDepth()))
        ) {
            Map<yacyURL, String> hl = document.getHyperlinks();
            Iterator<Map.Entry<yacyURL, String>> i = hl.entrySet().iterator();
            yacyURL nextUrl;
            Map.Entry<yacyURL, String> nextEntry;
            while (i.hasNext()) {
                // check for interruption
                checkInterruption();
                
                // fetching the next hyperlink
                nextEntry = i.next();
                nextUrl = nextEntry.getKey();
                // enqueue the hyperlink into the pre-notice-url db
                crawlStacker.enqueueEntry(nextUrl, entry.urlHash(), entry.initiator(), nextEntry.getValue(), docDate, entry.depth() + 1, entry.profile());
            }
            long stackEndTime = System.currentTimeMillis();
            if (log.isInfo()) log.logInfo("CRAWL: ADDED " + hl.size() + " LINKS FROM " + entry.url().toNormalform(false, true) +
                    ", NEW CRAWL STACK SIZE IS " + crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_CORE) +
                    ", STACKING TIME = " + (stackEndTime-stackStartTime) +
                    ", PARSING TIME = " + (parsingEndTime-parsingStartTime));
        }
        return document;
    }
    
    public indexingQueueEntry condenseDocument(indexingQueueEntry in) {
        in.queueEntry.updateStatus(plasmaSwitchboardQueue.QUEUE_STATE_CONDENSING);
        plasmaCondenser condenser = null;
        try {
            condenser = condenseDocument(in.queueEntry, in.document);
        } catch (InterruptedException e) {
            condenser = null;
        }
        if (condenser == null) {
            in.queueEntry.close();
            return null;
        }

        // update image result list statistics
        // its good to do this concurrently here, because it needs a DNS lookup
        // to compute a URL hash which is necessary for a double-check
        plasmaCrawlProfile.entry profile = profilesActiveCrawls.getEntry(in.queueEntry.profileHandle);
        plasmaCrawlResultImages.registerImages(in.document, (profile == null) ? true : !profile.remoteIndexing());
        
        return new indexingQueueEntry(in.queueEntry, in.document, condenser);
    }
    
    private plasmaCondenser condenseDocument(plasmaSwitchboardQueue.QueueEntry entry, plasmaParserDocument document) throws InterruptedException {
        // CREATE INDEX
        String dc_title = document.dc_title();
        yacyURL referrerURL = entry.referrerURL();
        int processCase = entry.processCase();
        
        String noIndexReason = plasmaCrawlEURL.DENIED_UNSPECIFIED_INDEXING_ERROR;
        if (processCase == PROCESSCASE_4_PROXY_LOAD) {
            // proxy-load
            noIndexReason = entry.shallIndexCacheForProxy();
        } else {
            // normal crawling
            noIndexReason = entry.shallIndexCacheForCrawler();
        }
        
        if (noIndexReason != null) {
            // check for interruption
            checkInterruption();
            
            log.logFine("Not indexed any word in URL " + entry.url() + "; cause: " + noIndexReason);
            addURLtoErrorDB(entry.url(), (referrerURL == null) ? null : referrerURL.hash(), entry.initiator(), dc_title, noIndexReason, new kelondroBitfield());
            /*
            if ((processCase == PROCESSCASE_6_GLOBAL_CRAWLING) && (initiatorPeer != null)) {
                if (clusterhashes != null) initiatorPeer.setAlternativeAddress((String) clusterhashes.get(initiatorPeer.hash));
                yacyClient.crawlReceipt(initiatorPeer, "crawl", "rejected", noIndexReason, null, "");
            }
            */
            document.close();
            document = null;
            return null;
        }
    
        // strip out words
        checkInterruption();
        if (this.log.isFine()) log.logFine("Condensing for '" + entry.url().toNormalform(false, true) + "'");
        plasmaCondenser condenser;
        try {
            condenser = new plasmaCondenser(document, entry.profile().indexText(), entry.profile().indexMedia());
        } catch (UnsupportedEncodingException e) {
            return null;
        }
        return condenser;
    }
    
    public indexingQueueEntry webStructureAnalysis(indexingQueueEntry in) {
        in.queueEntry.updateStatus(plasmaSwitchboardQueue.QUEUE_STATE_STRUCTUREANALYSIS);
        in.document.notifyWebStructure(webStructure, in.condenser, in.queueEntry.getModificationDate());
        return in;
    }
   
    public void storeDocumentIndex(indexingQueueEntry in) {
        in.queueEntry.updateStatus(plasmaSwitchboardQueue.QUEUE_STATE_INDEXSTORAGE);
        storeDocumentIndex(in.queueEntry, in.document, in.condenser);
        in.queueEntry.updateStatus(plasmaSwitchboardQueue.QUEUE_STATE_FINISHED);
        in.queueEntry.close();
    }
    
    private void storeDocumentIndex(plasmaSwitchboardQueue.QueueEntry queueEntry, plasmaParserDocument document, plasmaCondenser condenser) {
        
        // CREATE INDEX
        String dc_title = document.dc_title();
        yacyURL referrerURL = queueEntry.referrerURL();
        int processCase = queueEntry.processCase();

        // remove stopwords                        
        log.logInfo("Excluded " + condenser.excludeWords(stopwords) + " words in URL " + queueEntry.url());

        // STORE URL TO LOADED-URL-DB
        indexURLReference newEntry = null;
        try {
            newEntry = wordIndex.storeDocument(queueEntry, document, condenser);
        } catch (IOException e) {
            if (this.log.isFine()) log.logFine("Not Indexed Resource '" + queueEntry.url().toNormalform(false, true) + "': process case=" + processCase);
            addURLtoErrorDB(queueEntry.url(), referrerURL.hash(), queueEntry.initiator(), dc_title, "error storing url: " + e.getMessage(), new kelondroBitfield());
            return;
        }
        
        // update url result list statistics
        crawlResults.stack(
                newEntry,                      // loaded url db entry
                queueEntry.initiator(),        // initiator peer hash
                yacyCore.seedDB.mySeed().hash, // executor peer hash
                processCase                    // process case
        );
        
        // STORE WORD INDEX
        if ((!queueEntry.profile().indexText()) && (!queueEntry.profile().indexMedia())) {
            if (this.log.isFine()) log.logFine("Not Indexed Resource '" + queueEntry.url().toNormalform(false, true) + "': process case=" + processCase);
            addURLtoErrorDB(queueEntry.url(), referrerURL.hash(), queueEntry.initiator(), dc_title, plasmaCrawlEURL.DENIED_UNKNOWN_INDEXING_PROCESS_CASE, new kelondroBitfield());
            return;
        }
        
        // increment number of indexed urls
        indexedPages++;
        
        // update profiling info
        plasmaProfiling.updateIndexedPage(queueEntry);
        
        // if this was performed for a remote crawl request, notify requester
        yacySeed initiatorPeer = queueEntry.initiatorPeer();
        if ((processCase == PROCESSCASE_6_GLOBAL_CRAWLING) && (initiatorPeer != null)) {
            log.logInfo("Sending crawl receipt for '" + queueEntry.url().toNormalform(false, true) + "' to " + initiatorPeer.getName());
            if (clusterhashes != null) initiatorPeer.setAlternativeAddress((String) clusterhashes.get(initiatorPeer.hash));
            // start a thread for receipt sending to avoid a blocking here
            new Thread(new receiptSending(initiatorPeer, newEntry)).start();
        }
    }
    
    public class receiptSending implements Runnable {
        yacySeed initiatorPeer;
        indexURLReference reference;
        
        public receiptSending(yacySeed initiatorPeer, indexURLReference reference) {
            this.initiatorPeer = initiatorPeer;
            this.reference = reference;
        }
        public void run() {
            yacyClient.crawlReceipt(initiatorPeer, "crawl", "fill", "indexed", reference, "");
        }
    }
    
    private static SimpleDateFormat DateFormatter = new SimpleDateFormat("EEE, dd MMM yyyy");
    public static String dateString(Date date) {
        if (date == null) return ""; else return DateFormatter.format(date);
    }
    
    // we need locale independent RFC-822 dates at some places
    private static SimpleDateFormat DateFormatter822 = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US);
    public static String dateString822(Date date) {
        if (date == null) return ""; else return DateFormatter822.format(date);
    }
    
    
    public serverObjects action(String actionName, serverObjects actionInput) {
        // perform an action. (not used)    
        return null;
    }
    
    public String toString() {
        // it is possible to use this method in the cgi pages.
        // actually it is used there for testing purpose
        return "PROPS: " + super.toString() + "; QUEUE: " + sbQueue.toString();
    }
    
    // method for index deletion
    public int removeAllUrlReferences(yacyURL url, boolean fetchOnline) {
        return removeAllUrlReferences(url.hash(), fetchOnline);
    }
    
    public int removeAllUrlReferences(String urlhash, boolean fetchOnline) {
        // find all the words in a specific resource and remove the url reference from every word index
        // finally, delete the url entry
        
        // determine the url string
        indexURLReference entry = wordIndex.getURL(urlhash, null, 0);
        if (entry == null) return 0;
        indexURLReference.Components comp = entry.comp();
        if (comp.url() == null) return 0;
        
        InputStream resourceContent = null;
        try {
            // get the resource content
            Object[] resource = plasmaSnippetCache.getResource(comp.url(), fetchOnline, 10000, true, false);
            resourceContent = (InputStream) resource[0];
            Long resourceContentLength = (Long) resource[1];
            
            // parse the resource
            plasmaParserDocument document = plasmaSnippetCache.parseDocument(comp.url(), resourceContentLength.longValue(), resourceContent);
            
            // get the word set
            Set<String> words = null;
            try {
                words = new plasmaCondenser(document, true, true).words().keySet();
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            
            // delete all word references
            int count = 0;
            if (words != null) count = wordIndex.removeWordReferences(words, urlhash);
            
            // finally delete the url entry itself
            wordIndex.removeURL(urlhash);
            return count;
        } catch (ParserException e) {
            return 0;
        } finally {
            if (resourceContent != null) try { resourceContent.close(); } catch (Exception e) {/* ignore this */}
        }
    }

    public int adminAuthenticated(httpHeader header) {
        
        String adminAccountBase64MD5 = getConfig(httpd.ADMIN_ACCOUNT_B64MD5, "");
        String authorization = ((String) header.get(httpHeader.AUTHORIZATION, "xxxxxx")).trim().substring(6);
        
        // security check against too long authorization strings
        if (authorization.length() > 256) return 0; 
        
        // authorization by encoded password, only for localhost access
        if ((((String) header.get(httpHeader.CONNECTION_PROP_CLIENTIP, "")).equals("localhost")) && (adminAccountBase64MD5.equals(authorization))) return 3; // soft-authenticated for localhost

        // authorization by hit in userDB
        if (userDB.hasAdminRight((String) header.get(httpHeader.AUTHORIZATION, "xxxxxx"), ((String) header.get(httpHeader.CONNECTION_PROP_CLIENTIP, "")), header.getHeaderCookies())) return 4; //return, because 4=max

        // authorization with admin keyword in configuration
        return httpd.staticAdminAuthenticated(authorization, this);
    }
    
    public boolean verifyAuthentication(httpHeader header, boolean strict) {
        // handle access rights
        switch (adminAuthenticated(header)) {
        case 0: // wrong password given
            try { Thread.sleep(3000); } catch (InterruptedException e) { } // prevent brute-force
            return false;
        case 1: // no password given
            return false;
        case 2: // no password stored
            return !strict;
        case 3: // soft-authenticated for localhost only
            return true;
        case 4: // hard-authenticated, all ok
            return true;
        }
        return false;
    }
    
    public void setPerformance(int wantedPPM) {
        // we consider 3 cases here
        //         wantedPPM <=   10: low performance
        // 10   <  wantedPPM <  1000: custom performance
        // 1000 <= wantedPPM        : maximum performance
        if (wantedPPM <= 10) wantedPPM = 10;
        if (wantedPPM >= 1000) wantedPPM = 1000;
        int newBusySleep = 60000 / wantedPPM; // for wantedPPM = 10: 6000; for wantedPPM = 1000: 60

        serverBusyThread thread;
        
        thread = getThread(INDEX_DIST);
        if (thread != null) {
            setConfig(INDEX_DIST_BUSYSLEEP , thread.setBusySleep(Math.max(2000, thread.setBusySleep(newBusySleep * 2))));
            thread.setIdleSleep(30000);
        }
        
        thread = getThread(CRAWLJOB_LOCAL_CRAWL);
        if (thread != null) {
        	setConfig(CRAWLJOB_LOCAL_CRAWL_BUSYSLEEP , thread.setBusySleep(newBusySleep));
        	thread.setIdleSleep(1000);
        }
        
        thread = getThread(PROXY_CACHE_ENQUEUE);
        if (thread != null) {
            setConfig(PROXY_CACHE_ENQUEUE_BUSYSLEEP , thread.setBusySleep(0));
            thread.setIdleSleep(1000);
        }
        
        thread = getThread(INDEXER);
        if (thread != null) {
            setConfig(INDEXER_BUSYSLEEP , thread.setBusySleep(newBusySleep / 2));
            thread.setIdleSleep(1000);
        }
        
    }
    
    public static int accessFrequency(HashMap<String, TreeSet<Long>> tracker, String host) {
    	// returns the access frequency in queries per hour for a given host and a specific tracker
    	long timeInterval = 1000 * 60 * 60;
    	TreeSet<Long> accessSet = tracker.get(host);
    	if (accessSet == null) return 0;
    	return accessSet.tailSet(new Long(System.currentTimeMillis() - timeInterval)).size();
    }
    
    public void startTransferWholeIndex(yacySeed seed, boolean delete) {
        if (transferIdxThread == null) {
            this.transferIdxThread = new plasmaDHTFlush(this.log, this.wordIndex, seed, delete,
                                                        "true".equalsIgnoreCase(getConfig(INDEX_TRANSFER_GZIP_BODY, "false")),
                                                        (int) getConfigLong(INDEX_TRANSFER_TIMEOUT, 60000));
            this.transferIdxThread.start();
        }
    }    

    public void stopTransferWholeIndex(boolean wait) {
        if ((transferIdxThread != null) && (transferIdxThread.isAlive()) && (!transferIdxThread.isFinished())) {
            try {
                this.transferIdxThread.stopIt(wait);
            } catch (InterruptedException e) { }
        }
    }    

    public void abortTransferWholeIndex(boolean wait) {
        if (transferIdxThread != null) {
            if (!transferIdxThread.isFinished())
                try {
                    this.transferIdxThread.stopIt(wait);
                } catch (InterruptedException e) { }
                transferIdxThread = null;
        }
    }
    
    public String dhtShallTransfer() {
        if (yacyCore.seedDB == null) {
            return "no DHT distribution: seedDB == null";
        }
        if (yacyCore.seedDB.mySeed() == null) {
            return "no DHT distribution: mySeed == null";
        }
        if (yacyCore.seedDB.mySeed().isVirgin()) {
            return "no DHT distribution: status is virgin";
        }
        if (yacyCore.seedDB.noDHTActivity()) {
            return "no DHT distribution: network too small";
        }
        if (!this.getConfigBool("network.unit.dht", true)) {
            return "no DHT distribution: disabled by network.unit.dht";
        }
        if (getConfig(INDEX_DIST_ALLOW, "false").equalsIgnoreCase("false")) {
            return "no DHT distribution: not enabled (ser setting)";
        }
        if (wordIndex.countURL() < 10) {
            return "no DHT distribution: loadedURL.size() = " + wordIndex.countURL();
        }
        if (wordIndex.size() < 100) {
            return "no DHT distribution: not enough words - wordIndex.size() = " + wordIndex.size();
        }
        if ((getConfig(INDEX_DIST_ALLOW_WHILE_CRAWLING, "false").equalsIgnoreCase("false")) && (crawlQueues.noticeURL.notEmpty())) {
            return "no DHT distribution: crawl in progress: noticeURL.stackSize() = " + crawlQueues.noticeURL.size() + ", sbQueue.size() = " + sbQueue.size();
        }
        if ((getConfig(INDEX_DIST_ALLOW_WHILE_INDEXING, "false").equalsIgnoreCase("false")) && (sbQueue.size() > 1)) {
            return "no DHT distribution: indexing in progress: noticeURL.stackSize() = " + crawlQueues.noticeURL.size() + ", sbQueue.size() = " + sbQueue.size();
        }
        return null; // this means; yes, please do dht transfer
    }
    
    public boolean dhtTransferJob() {
        String rejectReason = dhtShallTransfer();
        if (rejectReason != null) {
            if (this.log.isFine()) log.logFine(rejectReason);
            return false;
        }
        if (this.dhtTransferChunk == null) {
            if (this.log.isFine()) log.logFine("no DHT distribution: no transfer chunk defined");
            return false;
        }
        if ((this.dhtTransferChunk != null) && (this.dhtTransferChunk.getStatus() != plasmaDHTChunk.chunkStatus_FILLED)) {
            if (this.log.isFine()) log.logFine("no DHT distribution: index distribution is in progress, status=" + this.dhtTransferChunk.getStatus());
            return false;
        }
        
        // do the transfer
        int peerCount = Math.max(1, (yacyCore.seedDB.mySeed().isJunior()) ?
                           (int) getConfigLong("network.unit.dhtredundancy.junior", 1) :
                           (int) getConfigLong("network.unit.dhtredundancy.senior", 1)); // set redundancy factor
        long starttime = System.currentTimeMillis();
        
        boolean ok = dhtTransferProcess(dhtTransferChunk, peerCount);

        if (ok) {
            dhtTransferChunk.setStatus(plasmaDHTChunk.chunkStatus_COMPLETE);
            if (this.log.isFine()) log.logFine("DHT distribution: transfer COMPLETE");
            // adopt transfer count
            if ((System.currentTimeMillis() - starttime) > (10000 * peerCount)) {
                dhtTransferIndexCount--;
            } else {
                if (dhtTransferChunk.indexCount() >= dhtTransferIndexCount) dhtTransferIndexCount++;
            }
            int minChunkSize = (int) getConfigLong(INDEX_DIST_CHUNK_SIZE_MIN, 30);
            int maxChunkSize = (int) getConfigLong(INDEX_DIST_CHUNK_SIZE_MAX, 3000);
            if (dhtTransferIndexCount < minChunkSize) dhtTransferIndexCount = minChunkSize;
            if (dhtTransferIndexCount > maxChunkSize) dhtTransferIndexCount = maxChunkSize;
            
            // show success
            return true;
        } else {
            dhtTransferChunk.incTransferFailedCounter();
            int maxChunkFails = (int) getConfigLong(INDEX_DIST_CHUNK_FAILS_MAX, 1);
            if (dhtTransferChunk.getTransferFailedCounter() >= maxChunkFails) {
                //System.out.println("DEBUG: " + dhtTransferChunk.getTransferFailedCounter() + " of " + maxChunkFails + " sendings failed for this chunk, aborting!");
                dhtTransferChunk.setStatus(plasmaDHTChunk.chunkStatus_FAILED);
                if (this.log.isFine()) log.logFine("DHT distribution: transfer FAILED");   
            }
            else {
                //System.out.println("DEBUG: " + dhtTransferChunk.getTransferFailedCounter() + " of " + maxChunkFails + " sendings failed for this chunk, retrying!");
                if (this.log.isFine()) log.logFine("DHT distribution: transfer FAILED, sending this chunk again");   
            }
            return false;
        }
    }

    public boolean dhtTransferProcess(plasmaDHTChunk dhtChunk, int peerCount) {
        if ((yacyCore.seedDB == null) || (yacyCore.seedDB.sizeConnected() == 0)) return false;

        try {
            // find a list of DHT-peers
            double maxDist = 0.2;
            ArrayList<yacySeed> seeds = yacyCore.dhtAgent.getDHTTargets(log, peerCount, Math.min(8, (int) (yacyCore.seedDB.sizeConnected() * maxDist)), dhtChunk.firstContainer().getWordHash(), dhtChunk.lastContainer().getWordHash(), maxDist);
            if (seeds.size() < peerCount) {
                log.logWarning("found not enough (" + seeds.size() + ") peers for distribution for dhtchunk [" + dhtChunk.firstContainer().getWordHash() + " .. " + dhtChunk.lastContainer().getWordHash() + "]");
                return false;
            }

            // send away the indexes to all these peers
            int hc1 = 0;

            // getting distribution configuration values
            boolean gzipBody = getConfig(INDEX_DIST_GZIP_BODY, "false").equalsIgnoreCase("true");
            int timeout = (int)getConfigLong(INDEX_DIST_TIMEOUT, 60000);
            int retries = 0;

            // starting up multiple DHT transfer threads   
            Iterator<yacySeed> seedIter = seeds.iterator();
            ArrayList<plasmaDHTTransfer> transfer = new ArrayList<plasmaDHTTransfer>(peerCount);
            while (hc1 < peerCount && (transfer.size() > 0 || seedIter.hasNext())) {
                
                // starting up some transfer threads
                int transferThreadCount = transfer.size();
                for (int i=0; i < peerCount-hc1-transferThreadCount; i++) {
                    // check for interruption
                    checkInterruption();
                                        
                    if (seedIter.hasNext()) {
                        plasmaDHTTransfer t = new plasmaDHTTransfer(log, (yacySeed)seedIter.next(), dhtChunk,gzipBody,timeout,retries);
                        t.start();
                        transfer.add(t);
                    } else {
                        break;
                    }
                }

                // waiting for the transfer threads to finish
                Iterator<plasmaDHTTransfer> transferIter = transfer.iterator();
                while (transferIter.hasNext()) {
                    // check for interruption
                    checkInterruption();
                    
                    plasmaDHTTransfer t = transferIter.next();
                    if (!t.isAlive()) {
                        // remove finished thread from the list
                        transferIter.remove();

                        // count successful transfers
                        if (t.getStatus() == plasmaDHTChunk.chunkStatus_COMPLETE) {
                            this.log.logInfo("DHT distribution: transfer to peer " + t.getSeed().getName() + " finished.");
                            hc1++;
                        }
                    }
                }

                if (hc1 < peerCount) Thread.sleep(100);
            }


            // clean up and finish with deletion of indexes
            if (hc1 >= peerCount) {
                // success
                return true;
            }
            this.log.logSevere("Index distribution failed. Too few peers (" + hc1 + ") received the index, not deleted locally.");
            return false;
        } catch (InterruptedException e) {
            return false;
        }
    }
    
    private void addURLtoErrorDB(
            yacyURL url, 
            String referrerHash, 
            String initiator, 
            String name, 
            String failreason, 
            kelondroBitfield flags
    ) {
        // create a new errorURL DB entry
        plasmaCrawlEntry bentry = new plasmaCrawlEntry(
                initiator, 
                url, 
                referrerHash, 
                (name == null) ? "" : name, 
                new Date(), 
                null,
                0, 
                0, 
                0);
        plasmaCrawlZURL.Entry ee = crawlQueues.errorURL.newEntry(
                bentry, initiator, new Date(),
                0, failreason);
        // store the entry
        ee.store();
        // push it onto the stack
        crawlQueues.errorURL.push(ee);
    }
    
    public void checkInterruption() throws InterruptedException {
        Thread curThread = Thread.currentThread();
        if ((curThread instanceof serverThread) && ((serverThread)curThread).shutdownInProgress()) throw new InterruptedException("Shutdown in progress ...");
        else if (this.terminate || curThread.isInterrupted()) throw new InterruptedException("Shutdown in progress ...");
    }

    public void terminate(long delay) {
        if (delay <= 0) throw new IllegalArgumentException("The shutdown delay must be greater than 0.");
        (new delayedShutdown(this,delay)).start();
    }
    
    public void terminate() {
        this.terminate = true;
        this.shutdownSync.V();
    }
    
    public boolean isTerminated() {
        return this.terminate;
    }
    
    public boolean waitForShutdown() throws InterruptedException {
        this.shutdownSync.P();
        return this.terminate;
    }

    /**
     * loads the url as Map
     * 
     * Strings like abc=123 are parsed as pair: abc => 123
     * 
     * @param url
     * @return
     */
    public static Map<String, String> loadHashMap(yacyURL url) {
        try {
            // sending request
            final HashMap<String, String> result = nxTools.table(
                    HttpClient.wget(url.toString())
                    , "UTF-8");
    
            if (result == null) return new HashMap<String, String>();
            return result;
        } catch (Exception e) {
            return new HashMap<String, String>();
        }
    }
}

class MoreMemory extends TimerTask {
    public final void run() {
        serverMemory.gc(10000, "MoreMemory()");
    }
}

class delayedShutdown extends Thread {
    private plasmaSwitchboard sb;
    private long delay;
    public delayedShutdown(plasmaSwitchboard sb, long delay) {
        this.sb = sb;
        this.delay = delay;
    }
    
    public void run() {
        try {
            Thread.sleep(delay);
        } catch (InterruptedException e) {
            sb.getLog().logInfo("interrupted delayed shutdown");
        }
        this.sb.terminate();
    }
}