yacy_search_server/source/de/anomic/crawler/CrawlQueues.java
orbiter 05dbba4bab added logging conditions to all fine and finest log line calls
this will prevent an overhead for the generation of the log lines in case that they then are not printed

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5102 6c8d7289-2bf4-0310-a012-ef5d649a1542
2008-09-03 00:30:21 +00:00

566 lines
25 KiB
Java

// plasmaCrawlQueues.java
// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 29.10.2007 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
// $LastChangedRevision: 1986 $
// $LastChangedBy: orbiter $
//
// 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
package de.anomic.crawler;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import de.anomic.index.indexDocumentMetadata;
import de.anomic.kelondro.kelondroFlexWidthArray;
import de.anomic.plasma.plasmaParser;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.plasma.plasmaSwitchboardConstants;
import de.anomic.server.serverDate;
import de.anomic.server.logging.serverLog;
import de.anomic.xml.RSSFeed;
import de.anomic.xml.RSSMessage;
import de.anomic.yacy.yacyClient;
import de.anomic.yacy.yacySeed;
import de.anomic.yacy.yacyURL;
public class CrawlQueues {
plasmaSwitchboard sb;
serverLog log;
Map<Integer, crawlWorker> workers; // mapping from url hash to Worker thread object
ProtocolLoader loader;
private final ArrayList<String> remoteCrawlProviderHashes;
public NoticedURL noticeURL;
public ZURL errorURL, delegatedURL;
public CrawlQueues(final plasmaSwitchboard sb, final File plasmaPath) {
this.sb = sb;
this.log = new serverLog("CRAWLER");
this.workers = new ConcurrentHashMap<Integer, crawlWorker>();
this.loader = new ProtocolLoader(sb, log);
this.remoteCrawlProviderHashes = new ArrayList<String>();
// start crawling management
log.logConfig("Starting Crawling Management");
noticeURL = new NoticedURL(plasmaPath);
//errorURL = new plasmaCrawlZURL(); // fresh error DB each startup; can be hold in RAM and reduces IO;
final File errorDBFile = new File(plasmaPath, "urlError2.db");
if (errorDBFile.exists()) {
// delete the error db to get a fresh each time on startup
// this is useful because there is currently no re-use of the data in this table.
if (errorDBFile.isDirectory()) kelondroFlexWidthArray.delete(plasmaPath, "urlError2.db"); else errorDBFile.delete();
}
errorURL = new ZURL(plasmaPath, "urlError2.db", false);
delegatedURL = new ZURL(plasmaPath, "urlDelegated2.db", true);
}
public String urlExists(final 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 (noticeURL.existsInStack(hash)) return "crawler";
if (delegatedURL.exists(hash)) return "delegated";
if (errorURL.exists(hash)) return "errors";
for (final crawlWorker worker: workers.values()) {
if (worker.entry.url().hash().equals(hash)) return "worker";
}
return null;
}
public void urlRemove(final String hash) {
noticeURL.removeByURLHash(hash);
delegatedURL.remove(hash);
errorURL.remove(hash);
}
public yacyURL getURL(final String urlhash) {
assert urlhash != null;
if (urlhash == null || urlhash.length() == 0) return null;
final CrawlEntry ne = noticeURL.get(urlhash);
if (ne != null) return ne.url();
ZURL.Entry ee = delegatedURL.getEntry(urlhash);
if (ee != null) return ee.url();
ee = errorURL.getEntry(urlhash);
if (ee != null) return ee.url();
for (final crawlWorker w: workers.values()) {
if (w.entry.url().hash().equals(urlhash)) return w.entry.url();
}
return null;
}
public void clear() {
// wait for all workers to finish
for (final crawlWorker w: workers.values()) {
w.interrupt();
}
// TODO: wait some more time until all threads are finished
workers.clear();
remoteCrawlProviderHashes.clear();
noticeURL.clear();
try {
errorURL.clear();
} catch (final IOException e) {
e.printStackTrace();
}
try {
delegatedURL.clear();
} catch (final IOException e) {
e.printStackTrace();
}
}
public void close() {
// wait for all workers to finish
for (final crawlWorker w: workers.values()) {
w.interrupt();
}
// TODO: wait some more time until all threads are finished
noticeURL.close();
errorURL.close();
delegatedURL.close();
}
public CrawlEntry[] activeWorkerEntries() {
synchronized (workers) {
final CrawlEntry[] e = new CrawlEntry[workers.size()];
int i = 0;
for (final crawlWorker w: workers.values()) e[i++] = w.entry;
return e;
}
}
public boolean isSupportedProtocol(final String protocol) {
return loader.isSupportedProtocol(protocol);
}
public int coreCrawlJobSize() {
return noticeURL.stackSize(NoticedURL.STACK_TYPE_CORE);
}
public boolean coreCrawlJob() {
final boolean robinsonPrivateCase = ((sb.isRobinsonMode()) &&
(!sb.getConfig(plasmaSwitchboardConstants.CLUSTER_MODE, "").equals(plasmaSwitchboardConstants.CLUSTER_MODE_PUBLIC_CLUSTER)) &&
(!sb.getConfig(plasmaSwitchboardConstants.CLUSTER_MODE, "").equals(plasmaSwitchboardConstants.CLUSTER_MODE_PRIVATE_CLUSTER)));
if (((robinsonPrivateCase) || (coreCrawlJobSize() <= 20)) && (limitCrawlJobSize() > 0)) {
// move some tasks to the core crawl job so we have something to do
final int toshift = Math.min(10, limitCrawlJobSize()); // this cannot be a big number because the balancer makes a forced waiting if it cannot balance
for (int i = 0; i < toshift; i++) {
noticeURL.shift(NoticedURL.STACK_TYPE_LIMIT, NoticedURL.STACK_TYPE_CORE);
}
log.logInfo("shifted " + toshift + " jobs from global crawl to local crawl (coreCrawlJobSize()=" + coreCrawlJobSize() +
", limitCrawlJobSize()=" + limitCrawlJobSize() + ", cluster.mode=" + sb.getConfig(plasmaSwitchboardConstants.CLUSTER_MODE, "") +
", robinsonMode=" + ((sb.isRobinsonMode()) ? "on" : "off"));
}
if (noticeURL.stackSize(NoticedURL.STACK_TYPE_CORE) == 0) {
//log.logDebug("CoreCrawl: queue is empty");
return false;
}
if (sb.webIndex.queuePreStack.size() >= (int) sb.getConfigLong(plasmaSwitchboardConstants.INDEXER_SLOTS, 30)) {
if (this.log.isFine()) log.logFine("CoreCrawl: too many processes in indexing queue, dismissed (" + "sbQueueSize=" + sb.webIndex.queuePreStack.size() + ")");
return false;
}
if (this.size() >= sb.getConfigLong(plasmaSwitchboardConstants.CRAWLER_THREADS_ACTIVE_MAX, 10)) {
if (this.log.isFine()) log.logFine("CoreCrawl: too many processes in loader queue, dismissed (" + "cacheLoader=" + this.size() + ")");
return false;
}
if (sb.onlineCaution()) {
if (this.log.isFine()) log.logFine("CoreCrawl: online caution, omitting processing");
return false;
}
// if crawling was paused we have to wait until we wer notified to continue
final Object[] status = sb.crawlJobsStatus.get(plasmaSwitchboardConstants.CRAWLJOB_LOCAL_CRAWL);
synchronized(status[plasmaSwitchboardConstants.CRAWLJOB_SYNC]) {
if (((Boolean)status[plasmaSwitchboardConstants.CRAWLJOB_STATUS]).booleanValue()) {
try {
status[plasmaSwitchboardConstants.CRAWLJOB_SYNC].wait();
}
catch (final InterruptedException e) {return false;}
}
}
// do a local crawl
CrawlEntry urlEntry = null;
while (urlEntry == null && noticeURL.stackSize(NoticedURL.STACK_TYPE_CORE) > 0) {
final String stats = "LOCALCRAWL[" + noticeURL.stackSize(NoticedURL.STACK_TYPE_CORE) + ", " + noticeURL.stackSize(NoticedURL.STACK_TYPE_LIMIT) + ", " + noticeURL.stackSize(NoticedURL.STACK_TYPE_OVERHANG) + ", " + noticeURL.stackSize(NoticedURL.STACK_TYPE_REMOTE) + "]";
try {
urlEntry = noticeURL.pop(NoticedURL.STACK_TYPE_CORE, true);
final String profileHandle = urlEntry.profileHandle();
// System.out.println("DEBUG plasmaSwitchboard.processCrawling:
// profileHandle = " + profileHandle + ", urlEntry.url = " + urlEntry.url());
if (profileHandle == null) {
log.logSevere(stats + ": NULL PROFILE HANDLE '" + urlEntry.profileHandle() + "' for URL " + urlEntry.url());
return true;
}
final CrawlProfile.entry profile = sb.webIndex.profilesActiveCrawls.getEntry(profileHandle);
if (profile == null) {
log.logWarning(stats + ": LOST PROFILE HANDLE '" + urlEntry.profileHandle() + "' for URL " + urlEntry.url());
return true;
}
// check if the protocol is supported
final yacyURL url = urlEntry.url();
final String urlProtocol = url.getProtocol();
if (!this.sb.crawlQueues.isSupportedProtocol(urlProtocol)) {
this.log.logSevere("Unsupported protocol in URL '" + url.toString());
return true;
}
if (this.log.isFine()) log.logFine("LOCALCRAWL: URL=" + urlEntry.url() + ", initiator=" + urlEntry.initiator() + ", crawlOrder=" + ((profile.remoteIndexing()) ? "true" : "false") + ", depth=" + urlEntry.depth() + ", crawlDepth=" + profile.generalDepth() + ", filter=" + profile.generalFilter()
+ ", permission=" + ((sb.webIndex.seedDB == null) ? "undefined" : (((sb.webIndex.seedDB.mySeed().isSenior()) || (sb.webIndex.seedDB.mySeed().isPrincipal())) ? "true" : "false")));
processLocalCrawling(urlEntry, stats);
return true;
} catch (final IOException e) {
log.logSevere(stats + ": CANNOT FETCH ENTRY: " + e.getMessage(), e);
if (e.getMessage().indexOf("hash is null") > 0) noticeURL.clear(NoticedURL.STACK_TYPE_CORE);
}
}
return true;
}
public boolean remoteCrawlLoaderJob() {
// check if we are allowed to crawl urls provided by other peers
if (!sb.webIndex.seedDB.mySeed().getFlagAcceptRemoteCrawl()) {
//this.log.logInfo("remoteCrawlLoaderJob: not done, we are not allowed to do that");
return false;
}
// check if we are a senior peer
if (!sb.webIndex.seedDB.mySeed().isActive()) {
//this.log.logInfo("remoteCrawlLoaderJob: not done, this should be a senior or principal peer");
return false;
}
if (sb.webIndex.queuePreStack.size() >= (int) sb.getConfigLong(plasmaSwitchboardConstants.INDEXER_SLOTS, 30) / 2) {
if (this.log.isFine()) log.logFine("remoteCrawlLoaderJob: too many processes in indexing queue, dismissed (" + "sbQueueSize=" + sb.webIndex.queuePreStack.size() + ")");
return false;
}
if (this.size() >= sb.getConfigLong(plasmaSwitchboardConstants.CRAWLER_THREADS_ACTIVE_MAX, 10)) {
if (this.log.isFine()) log.logFine("remoteCrawlLoaderJob: too many processes in loader queue, dismissed (" + "cacheLoader=" + this.size() + ")");
return false;
}
if (sb.onlineCaution()) {
if (this.log.isFine()) log.logFine("remoteCrawlLoaderJob: online caution, omitting processing");
return false;
}
if (remoteTriggeredCrawlJobSize() > 0) {
if (this.log.isFine()) log.logFine("remoteCrawlLoaderJob: the remote-triggered crawl job queue is filled, omitting processing");
return false;
}
/*
if (coreCrawlJobSize() > 0) {
if (this.log.isFine()) log.logFine("remoteCrawlLoaderJob: a local crawl is running, omitting processing");
return false;
}
*/
// check if we have an entry in the provider list, otherwise fill the list
yacySeed seed;
if (remoteCrawlProviderHashes.size() == 0) {
if (sb.webIndex.seedDB != null && sb.webIndex.seedDB.sizeConnected() > 0) {
final Iterator<yacySeed> e = sb.webIndex.peerActions.dhtAction.getProvidesRemoteCrawlURLs();
while (e.hasNext()) {
seed = e.next();
if (seed != null) {
remoteCrawlProviderHashes.add(seed.hash);
}
}
}
}
if (remoteCrawlProviderHashes.size() == 0) return false;
// take one entry from the provider list and load the entries from the remote peer
seed = null;
String hash = null;
while ((seed == null) && (remoteCrawlProviderHashes.size() > 0)) {
hash = remoteCrawlProviderHashes.remove(remoteCrawlProviderHashes.size() - 1);
if (hash == null) continue;
seed = sb.webIndex.seedDB.get(hash);
if (seed == null) continue;
// check if the peer is inside our cluster
if ((sb.isRobinsonMode()) && (!sb.isInMyCluster(seed))) {
seed = null;
continue;
}
}
if (seed == null) return false;
// we know a peer which should provide remote crawl entries. load them now.
final RSSFeed feed = yacyClient.queryRemoteCrawlURLs(sb.webIndex.seedDB, seed, 20);
if (feed == null) return true;
// parse the rss
yacyURL url, referrer;
Date loaddate;
for (final RSSMessage item: feed) {
//System.out.println("URL=" + item.getLink() + ", desc=" + item.getDescription() + ", pubDate=" + item.getPubDate());
// put url on remote crawl stack
try {
url = new yacyURL(item.getLink(), null);
} catch (final MalformedURLException e) {
url = null;
}
try {
referrer = new yacyURL(item.getReferrer(), null);
} catch (final MalformedURLException e) {
referrer = null;
}
try {
loaddate = serverDate.parseShortSecond(item.getPubDate());
} catch (final ParseException e) {
loaddate = new Date();
}
final String urlRejectReason = sb.acceptURL(url);
if (urlRejectReason == null) {
// stack url
if (sb.getLog().isFinest()) sb.getLog().logFinest("crawlOrder: stack: url='" + url + "'");
final String reasonString = sb.crawlStacker.stackCrawl(url, referrer, hash, item.getDescription(), loaddate, 0, sb.webIndex.defaultRemoteProfile);
if (reasonString == null) {
// done
log.logInfo("crawlOrder: added remote crawl url: " + urlToString(url));
} else if (reasonString.startsWith("double")) {
// case where we have already the url loaded;
log.logInfo("crawlOrder: ignored double remote crawl url: " + urlToString(url));
} else {
log.logInfo("crawlOrder: ignored [" + reasonString + "] remote crawl url: " + urlToString(url));
}
} else {
log.logWarning("crawlOrder: Rejected URL '" + urlToString(url) + "': " + urlRejectReason);
}
}
return true;
}
/**
* @param url
* @return
*/
private String urlToString(final yacyURL url) {
return (url == null ? "null" : url.toNormalform(true, false));
}
public int limitCrawlJobSize() {
return noticeURL.stackSize(NoticedURL.STACK_TYPE_LIMIT);
}
public int remoteTriggeredCrawlJobSize() {
return noticeURL.stackSize(NoticedURL.STACK_TYPE_REMOTE);
}
public boolean remoteTriggeredCrawlJob() {
// work off crawl requests that had been placed by other peers to our crawl stack
// do nothing if either there are private processes to be done
// or there is no global crawl on the stack
if (noticeURL.stackSize(NoticedURL.STACK_TYPE_REMOTE) == 0) {
//log.logDebug("GlobalCrawl: queue is empty");
return false;
}
if (sb.webIndex.queuePreStack.size() >= (int) sb.getConfigLong(plasmaSwitchboardConstants.INDEXER_SLOTS, 30)) {
if (this.log.isFine()) log.logFine("GlobalCrawl: too many processes in indexing queue, dismissed (" + "sbQueueSize=" + sb.webIndex.queuePreStack.size() + ")");
return false;
}
if (this.size() >= sb.getConfigLong(plasmaSwitchboardConstants.CRAWLER_THREADS_ACTIVE_MAX, 10)) {
if (this.log.isFine()) log.logFine("GlobalCrawl: too many processes in loader queue, dismissed (" + "cacheLoader=" + this.size() + ")");
return false;
}
if (sb.onlineCaution()) {
if (this.log.isFine()) log.logFine("GlobalCrawl: online caution, omitting processing");
return false;
}
// if crawling was paused we have to wait until we wer notified to continue
final Object[] status = sb.crawlJobsStatus.get(plasmaSwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL);
synchronized(status[plasmaSwitchboardConstants.CRAWLJOB_SYNC]) {
if (((Boolean)status[plasmaSwitchboardConstants.CRAWLJOB_STATUS]).booleanValue()) {
try {
status[plasmaSwitchboardConstants.CRAWLJOB_SYNC].wait();
}
catch (final InterruptedException e){ return false;}
}
}
// we don't want to crawl a global URL globally, since WE are the global part. (from this point of view)
final String stats = "REMOTETRIGGEREDCRAWL[" + noticeURL.stackSize(NoticedURL.STACK_TYPE_CORE) + ", " + noticeURL.stackSize(NoticedURL.STACK_TYPE_LIMIT) + ", " + noticeURL.stackSize(NoticedURL.STACK_TYPE_OVERHANG) + ", "
+ noticeURL.stackSize(NoticedURL.STACK_TYPE_REMOTE) + "]";
try {
final CrawlEntry urlEntry = noticeURL.pop(NoticedURL.STACK_TYPE_REMOTE, true);
final String profileHandle = urlEntry.profileHandle();
// System.out.println("DEBUG plasmaSwitchboard.processCrawling:
// profileHandle = " + profileHandle + ", urlEntry.url = " +
// urlEntry.url());
final CrawlProfile.entry profile = sb.webIndex.profilesActiveCrawls.getEntry(profileHandle);
if (profile == null) {
log.logWarning(stats + ": LOST PROFILE HANDLE '" + urlEntry.profileHandle() + "' for URL " + urlEntry.url());
return false;
}
// check if the protocol is supported
final yacyURL url = urlEntry.url();
final String urlProtocol = url.getProtocol();
if (!this.sb.crawlQueues.isSupportedProtocol(urlProtocol)) {
this.log.logSevere("Unsupported protocol in URL '" + url.toString());
return true;
}
if (this.log.isFine()) log.logFine("plasmaSwitchboard.remoteTriggeredCrawlJob: url=" + urlEntry.url() + ", initiator=" + urlEntry.initiator() + ", crawlOrder=" + ((profile.remoteIndexing()) ? "true" : "false") + ", depth=" + urlEntry.depth() + ", crawlDepth=" + profile.generalDepth() + ", filter="
+ profile.generalFilter() + ", permission=" + ((sb.webIndex.seedDB == null) ? "undefined" : (((sb.webIndex.seedDB.mySeed().isSenior()) || (sb.webIndex.seedDB.mySeed().isPrincipal())) ? "true" : "false")));
processLocalCrawling(urlEntry, stats);
return true;
} catch (final IOException e) {
log.logSevere(stats + ": CANNOT FETCH ENTRY: " + e.getMessage(), e);
if (e.getMessage().indexOf("hash is null") > 0) noticeURL.clear(NoticedURL.STACK_TYPE_REMOTE);
return true;
}
}
private void processLocalCrawling(final CrawlEntry entry, final String stats) {
// work off one Crawl stack entry
if ((entry == null) || (entry.url() == null)) {
log.logInfo(stats + ": urlEntry = null");
return;
}
new crawlWorker(entry);
log.logInfo(stats + ": enqueued for load " + entry.url() + " [" + entry.url().hash() + "]");
return;
}
public indexDocumentMetadata loadResourceFromWeb(
final yacyURL url,
final int socketTimeout,
final boolean keepInMemory,
final boolean forText,
final boolean global
) {
final CrawlEntry centry = new CrawlEntry(
sb.webIndex.seedDB.mySeed().hash,
url,
"",
"",
new Date(),
(forText) ?
((global) ?
sb.webIndex.defaultTextSnippetGlobalProfile.handle() :
sb.webIndex.defaultTextSnippetLocalProfile.handle())
:
((global) ?
sb.webIndex.defaultMediaSnippetGlobalProfile.handle() :
sb.webIndex.defaultMediaSnippetLocalProfile.handle()), // crawl profile
0,
0,
0);
return loader.load(centry, (forText) ? plasmaParser.PARSER_MODE_CRAWLER : plasmaParser.PARSER_MODE_IMAGE);
}
public int size() {
return workers.size();
}
protected final class crawlWorker extends Thread {
public CrawlEntry entry;
private final Integer code;
public crawlWorker(final CrawlEntry entry) {
this.entry = entry;
this.entry.setStatus("worker-initialized");
this.code = Integer.valueOf(entry.hashCode());
if (!workers.containsKey(code)) {
workers.put(code, this);
this.start();
}
}
public void run() {
try {
// checking robots.txt for http(s) resources
this.entry.setStatus("worker-checkingrobots");
if ((entry.url().getProtocol().equals("http") || entry.url().getProtocol().equals("https")) && sb.robots.isDisallowed(entry.url())) {
if (log.isFine()) log.logFine("Crawling of URL '" + entry.url().toString() + "' disallowed by robots.txt.");
final ZURL.Entry eentry = errorURL.newEntry(
this.entry,
sb.webIndex.seedDB.mySeed().hash,
new Date(),
1,
"denied by robots.txt");
eentry.store();
errorURL.push(eentry);
} else {
// starting a load from the internet
this.entry.setStatus("worker-loading");
final String result = loader.process(this.entry, plasmaParser.PARSER_MODE_CRAWLER);
if (result != null) {
final ZURL.Entry eentry = errorURL.newEntry(
this.entry,
sb.webIndex.seedDB.mySeed().hash,
new Date(),
1,
"cannot load: " + result);
eentry.store();
errorURL.push(eentry);
} else {
this.entry.setStatus("worker-processed");
}
}
} catch (final Exception e) {
final ZURL.Entry eentry = errorURL.newEntry(
this.entry,
sb.webIndex.seedDB.mySeed().hash,
new Date(),
1,
e.getMessage() + " - in worker");
eentry.store();
errorURL.push(eentry);
e.printStackTrace();
} finally {
workers.remove(code);
this.entry.setStatus("worker-finalized");
}
}
}
}