mirror of
https://github.com/yacy/yacy_search_server.git
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dc26d6262b
- added new data structure 'eco' for an index file that should use only 50% of write-IO compared to kelondroFlex The new eco index is not used yet, but already successfully tested with the collectionIndex The main purpose is to replace the kelondroFlex at every point when enough RAM is available. Othervise, the kelondroFlex stays as option in case of low memory (which then can even use a file-index) git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4337 6c8d7289-2bf4-0310-a012-ef5d649a1542
503 lines
22 KiB
Java
503 lines
22 KiB
Java
// plasmaCrawlStacker.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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//
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// This file was contributed by Martin Thelian
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// ([MC] removed all multithreading and thread pools, this is not necessary here; complete renovation 2007)
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import java.io.File;
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import java.io.IOException;
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import java.net.UnknownHostException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.LinkedList;
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import de.anomic.index.indexURLEntry;
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import de.anomic.kelondro.kelondroCache;
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import de.anomic.kelondro.kelondroException;
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import de.anomic.kelondro.kelondroFlexTable;
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import de.anomic.kelondro.kelondroFlexWidthArray;
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import de.anomic.kelondro.kelondroIndex;
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import de.anomic.kelondro.kelondroRow;
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import de.anomic.kelondro.kelondroRowSet;
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import de.anomic.kelondro.kelondroTree;
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import de.anomic.plasma.urlPattern.plasmaURLPattern;
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import de.anomic.server.serverDomains;
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import de.anomic.server.logging.serverLog;
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import de.anomic.yacy.yacyCore;
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import de.anomic.yacy.yacyURL;
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public final class plasmaCrawlStacker extends Thread {
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// keys for different database types
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public static final int QUEUE_DB_TYPE_RAM = 0;
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public static final int QUEUE_DB_TYPE_TREE = 1;
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public static final int QUEUE_DB_TYPE_FLEX = 2;
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final serverLog log = new serverLog("STACKCRAWL");
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private plasmaSwitchboard sb;
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private final LinkedList<String> urlEntryHashCache;
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private kelondroIndex urlEntryCache;
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private File cacheStacksPath;
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private long preloadTime;
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private int dbtype;
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private boolean prequeue;
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private long dnsHit, dnsMiss;
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private int alternateCount;
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// objects for the prefetch task
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private ArrayList<String> dnsfetchHosts = new ArrayList<String>();
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public plasmaCrawlStacker(plasmaSwitchboard sb, File dbPath, long preloadTime, int dbtype, boolean prequeue) {
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this.sb = sb;
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this.prequeue = prequeue;
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this.dnsHit = 0;
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this.dnsMiss = 0;
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this.alternateCount = 0;
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// init the message list
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this.urlEntryHashCache = new LinkedList<String>();
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// create a stack for newly entered entries
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this.cacheStacksPath = dbPath;
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this.preloadTime = preloadTime;
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this.dbtype = dbtype;
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openDB();
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try {
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// loop through the list and fill the messageList with url hashs
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Iterator<kelondroRow.Entry> rows = this.urlEntryCache.rows(true, null);
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kelondroRow.Entry entry;
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while (rows.hasNext()) {
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entry = (kelondroRow.Entry) rows.next();
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if (entry == null) {
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System.out.println("ERROR! null element found");
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continue;
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}
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this.urlEntryHashCache.add(entry.getColString(0, null));
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}
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} catch (kelondroException e) {
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/* if we have an error, we start with a fresh database */
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plasmaCrawlStacker.this.log.logSevere("Unable to initialize crawl stacker queue, kelondroException:" + e.getMessage() + ". Reseting DB.\n", e);
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// deleting old db and creating a new db
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try {this.urlEntryCache.close();} catch (Exception ex) {}
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deleteDB();
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openDB();
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} catch (IOException e) {
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/* if we have an error, we start with a fresh database */
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plasmaCrawlStacker.this.log.logSevere("Unable to initialize crawl stacker queue, IOException:" + e.getMessage() + ". Reseting DB.\n", e);
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// deleting old db and creating a new db
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try {this.urlEntryCache.close();} catch (Exception ex) {}
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deleteDB();
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openDB();
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}
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this.log.logInfo(size() + " entries in the stackCrawl queue.");
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this.start(); // start the prefetcher thread
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this.log.logInfo("STACKCRAWL thread initialized.");
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}
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public void run() {
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String nextHost;
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try {
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while (!Thread.currentThread().isInterrupted()) { // action loop
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if (dnsfetchHosts.size() == 0) synchronized (this) { wait(); }
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synchronized (dnsfetchHosts) {
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nextHost = (String) dnsfetchHosts.remove(dnsfetchHosts.size() - 1);
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}
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try {
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serverDomains.dnsResolve(nextHost);
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} catch (Exception e) {}
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}
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} catch (InterruptedException e) {}
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}
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public boolean prefetchHost(String host) {
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// returns true when the host was known in the dns cache.
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// If not, the host is stacked on the fetch stack and false is returned
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try {
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serverDomains.dnsResolveFromCache(host);
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return true;
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} catch (UnknownHostException e) {
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synchronized (this) {
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dnsfetchHosts.add(host);
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notifyAll();
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}
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return false;
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}
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}
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public void terminateDNSPrefetcher() {
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synchronized (this) {
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interrupt();
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}
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}
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public void close() {
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if (this.dbtype == QUEUE_DB_TYPE_RAM) {
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this.log.logFine("Shutdown. Flushing remaining " + size() + " crawl stacker job entries. please wait.");
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while (size() > 0) {
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if (!job()) break;
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}
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}
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terminateDNSPrefetcher();
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this.log.logFine("Shutdown. Closing stackCrawl queue.");
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// closing the db
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this.urlEntryCache.close();
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// clearing the hash list
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this.urlEntryHashCache.clear();
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}
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public boolean job() {
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plasmaCrawlEntry entry;
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try {
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entry = dequeueEntry();
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} catch (IOException e) {
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e.printStackTrace();
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return false;
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}
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if (entry == null) return false;
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try {
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String rejectReason = sb.crawlStacker.stackCrawl(entry);
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// if the url was rejected we store it into the error URL db
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if (rejectReason != null) {
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plasmaCrawlZURL.Entry ee = sb.crawlQueues.errorURL.newEntry(entry, yacyCore.seedDB.mySeed().hash, null, 0, rejectReason);
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ee.store();
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sb.crawlQueues.errorURL.push(ee);
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}
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} catch (Exception e) {
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plasmaCrawlStacker.this.log.logWarning("Error while processing stackCrawl entry.\n" + "Entry: " + entry.toString() + "Error: " + e.toString(), e);
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return false;
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}
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return true;
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}
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public void enqueueEntry(
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yacyURL nexturl,
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String referrerhash,
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String initiatorHash,
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String name,
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Date loadDate,
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int currentdepth,
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plasmaCrawlProfile.entry profile) {
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if (profile == null) return;
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plasmaCrawlEntry newEntry = new plasmaCrawlEntry(
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initiatorHash,
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nexturl,
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referrerhash,
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name,
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loadDate,
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profile.handle(),
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currentdepth,
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0,
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0
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);
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if (newEntry == null) return;
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synchronized(this.urlEntryHashCache) {
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kelondroRow.Entry oldValue;
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boolean hostknown = true;
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if (prequeue) hostknown = prefetchHost(nexturl.getHost());
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try {
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oldValue = this.urlEntryCache.put(newEntry.toRow());
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} catch (IOException e) {
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oldValue = null;
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}
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if (oldValue == null) {
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//System.out.println("*** debug crawlStacker dnsHit=" + this.dnsHit + ", dnsMiss=" + this.dnsMiss + ", alternateCount=" + this.alternateCount + ((this.dnsMiss > 0) ? (", Q=" + (this.dnsHit / this.dnsMiss)) : ""));
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if (hostknown) {
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this.alternateCount++;
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this.urlEntryHashCache.addFirst(newEntry.url().hash());
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this.dnsHit++;
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} else {
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if ((this.dnsMiss > 0) && (this.alternateCount > 2 * this.dnsHit / this.dnsMiss)) {
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this.urlEntryHashCache.addFirst(newEntry.url().hash());
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this.alternateCount = 0;
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//System.out.println("*** debug crawlStacker alternate switch, dnsHit=" + this.dnsHit + ", dnsMiss=" + this.dnsMiss + ", alternateCount=" + this.alternateCount + ", Q=" + (this.dnsHit / this.dnsMiss));
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} else {
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this.urlEntryHashCache.addLast(newEntry.url().hash());
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}
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this.dnsMiss++;
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}
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}
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}
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}
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private void deleteDB() {
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if (this.dbtype == QUEUE_DB_TYPE_RAM) {
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// do nothing..
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}
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if (this.dbtype == QUEUE_DB_TYPE_FLEX) {
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kelondroFlexWidthArray.delete(cacheStacksPath, "urlNoticeStacker8.db");
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}
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if (this.dbtype == QUEUE_DB_TYPE_TREE) {
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File cacheFile = new File(cacheStacksPath, "urlNoticeStacker8.db");
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cacheFile.delete();
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}
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}
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private void openDB() {
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if (!(cacheStacksPath.exists())) cacheStacksPath.mkdir(); // make the path
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if (this.dbtype == QUEUE_DB_TYPE_RAM) {
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this.urlEntryCache = new kelondroRowSet(plasmaCrawlEntry.rowdef, 0);
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}
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if (this.dbtype == QUEUE_DB_TYPE_FLEX) {
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String newCacheName = "urlNoticeStacker8.db";
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cacheStacksPath.mkdirs();
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try {
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this.urlEntryCache = new kelondroCache(new kelondroFlexTable(cacheStacksPath, newCacheName, preloadTime, plasmaCrawlEntry.rowdef, 0, true));
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} catch (Exception e) {
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e.printStackTrace();
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// kill DB and try again
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kelondroFlexTable.delete(cacheStacksPath, newCacheName);
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try {
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this.urlEntryCache = new kelondroCache(new kelondroFlexTable(cacheStacksPath, newCacheName, preloadTime, plasmaCrawlEntry.rowdef, 0, true));
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} catch (Exception ee) {
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ee.printStackTrace();
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System.exit(-1);
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}
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}
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}
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if (this.dbtype == QUEUE_DB_TYPE_TREE) {
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File cacheFile = new File(cacheStacksPath, "urlNoticeStacker8.db");
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cacheFile.getParentFile().mkdirs();
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this.urlEntryCache = new kelondroCache(kelondroTree.open(cacheFile, true, preloadTime, plasmaCrawlEntry.rowdef));
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}
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}
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public int size() {
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synchronized (this.urlEntryHashCache) {
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return this.urlEntryHashCache.size();
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}
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}
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public int getDBType() {
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return this.dbtype;
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}
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public plasmaCrawlEntry dequeueEntry() throws IOException {
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if (this.urlEntryHashCache.size() == 0) return null;
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String urlHash = null;
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kelondroRow.Entry entry = null;
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synchronized (this.urlEntryHashCache) {
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urlHash = (String) this.urlEntryHashCache.removeFirst();
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if (urlHash == null) throw new IOException("urlHash is null");
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entry = this.urlEntryCache.remove(urlHash.getBytes(), false);
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}
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if ((urlHash == null) || (entry == null)) return null;
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return new plasmaCrawlEntry(entry);
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}
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public String stackCrawl(yacyURL url, yacyURL referrer, String initiatorHash, String name, Date loadDate, int currentdepth, plasmaCrawlProfile.entry profile) {
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// stacks a crawl item. The position can also be remote
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// returns null if successful, a reason string if not successful
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//this.log.logFinest("stackCrawl: nexturlString='" + nexturlString + "'");
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// add the url into the crawling queue
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plasmaCrawlEntry entry = new plasmaCrawlEntry(
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initiatorHash, // initiator, needed for p2p-feedback
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url, // url clear text string
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(referrer == null) ? null : referrer.hash(), // last url in crawling queue
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name, // load date
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loadDate, // the anchor name
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(profile == null) ? null : profile.handle(), // profile must not be null!
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currentdepth, // depth so far
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0, // anchors, default value
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0 // forkfactor, default value
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);
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return stackCrawl(entry);
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}
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public String stackCrawl(plasmaCrawlEntry entry) {
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// stacks a crawl item. The position can also be remote
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// returns null if successful, a reason string if not successful
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//this.log.logFinest("stackCrawl: nexturlString='" + nexturlString + "'");
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long startTime = System.currentTimeMillis();
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String reason = null; // failure reason
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// check if the protocol is supported
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String urlProtocol = entry.url().getProtocol();
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if (!sb.crawlQueues.isSupportedProtocol(urlProtocol)) {
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reason = plasmaCrawlEURL.DENIED_UNSUPPORTED_PROTOCOL;
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this.log.logSevere("Unsupported protocol in URL '" + entry.url().toString() + "'. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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// check if ip is local ip address
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if (!sb.acceptURL(entry.url())) {
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reason = plasmaCrawlEURL.DENIED_IP_ADDRESS_NOT_IN_DECLARED_DOMAIN + "[" + sb.getConfig("network.unit.domain", "unknown") + "]";
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this.log.logFine("Host in URL '" + entry.url().toString() + "' has IP address outside of declared range (" + sb.getConfig("network.unit.domain", "unknown") + "). " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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// check blacklist
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if (plasmaSwitchboard.urlBlacklist.isListed(plasmaURLPattern.BLACKLIST_CRAWLER, entry.url())) {
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reason = plasmaCrawlEURL.DENIED_URL_IN_BLACKLIST;
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this.log.logFine("URL '" + entry.url().toString() + "' is in blacklist. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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plasmaCrawlProfile.entry profile = sb.profilesActiveCrawls.getEntry(entry.profileHandle());
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if (profile == null) {
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String errorMsg = "LOST PROFILE HANDLE '" + entry.profileHandle() + "' for URL " + entry.url();
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log.logWarning(errorMsg);
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return errorMsg;
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}
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// filter deny
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if ((entry.depth() > 0) && (profile != null) && (!(entry.url().toString().matches(profile.generalFilter())))) {
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reason = plasmaCrawlEURL.DENIED_URL_DOES_NOT_MATCH_FILTER;
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this.log.logFine("URL '" + entry.url().toString() + "' does not match crawling filter '" + profile.generalFilter() + "'. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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// deny cgi
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if (entry.url().isCGI()) {
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reason = plasmaCrawlEURL.DENIED_CGI_URL;
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this.log.logFine("URL '" + entry.url().toString() + "' is CGI URL. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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// deny post properties
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if ((entry.url().isPOST()) && (profile != null) && (!(profile.crawlingQ()))) {
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reason = plasmaCrawlEURL.DENIED_POST_URL;
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this.log.logFine("URL '" + entry.url().toString() + "' is post URL. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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yacyURL referrerURL = (entry.referrerhash() == null) ? null : sb.crawlQueues.getURL(entry.referrerhash());
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// add domain to profile domain list
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if ((profile.domFilterDepth() != Integer.MAX_VALUE) || (profile.domMaxPages() != Integer.MAX_VALUE)) {
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profile.domInc(entry.url().getHost(), (referrerURL == null) ? null : referrerURL.getHost().toLowerCase(), entry.depth());
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}
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// deny urls that do not match with the profile domain list
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if (!(profile.grantedDomAppearance(entry.url().getHost()))) {
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reason = plasmaCrawlEURL.DENIED_NO_MATCH_WITH_DOMAIN_FILTER;
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this.log.logFine("URL '" + entry.url().toString() + "' is not listed in granted domains. " +
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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// deny urls that exceed allowed number of occurrences
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if (!(profile.grantedDomCount(entry.url().getHost()))) {
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reason = plasmaCrawlEURL.DENIED_DOMAIN_COUNT_EXCEEDED;
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this.log.logFine("URL '" + entry.url().toString() + "' appeared too often, a maximum of " + profile.domMaxPages() + " is allowed. "+
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"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
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return reason;
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}
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|
|
// check if the url is double registered
|
|
String dbocc = sb.crawlQueues.urlExists(entry.url().hash());
|
|
indexURLEntry oldEntry = this.sb.wordIndex.loadedURL.load(entry.url().hash(), null, 0);
|
|
boolean recrawl = (oldEntry != null) && ((System.currentTimeMillis() - oldEntry.loaddate().getTime()) > profile.recrawlIfOlder());
|
|
// do double-check
|
|
if ((dbocc != null) && (!recrawl)) {
|
|
reason = plasmaCrawlEURL.DOUBLE_REGISTERED + dbocc + ")";
|
|
this.log.logFine("URL '" + entry.url().toString() + "' is double registered in '" + dbocc + "'. " + "Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
if ((oldEntry != null) && (!recrawl)) {
|
|
reason = plasmaCrawlEURL.DOUBLE_REGISTERED + "LURL)";
|
|
this.log.logFine("URL '" + entry.url().toString() + "' is double registered in 'LURL'. " + "Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// show potential re-crawl
|
|
if (recrawl) {
|
|
this.log.logFine("RE-CRAWL of URL '" + entry.url().toString() + "': this url was crawled " +
|
|
((System.currentTimeMillis() - oldEntry.loaddate().getTime()) / 60000 / 60 / 24) + " days ago.");
|
|
}
|
|
|
|
// store information
|
|
boolean local = ((entry.initiator().equals(yacyURL.dummyHash)) || (entry.initiator().equals(yacyCore.seedDB.mySeed().hash)));
|
|
boolean global =
|
|
(profile != null) &&
|
|
(profile.remoteIndexing()) /* granted */ &&
|
|
(entry.depth() == profile.generalDepth()) /* leaf node */ &&
|
|
//(initiatorHash.equals(yacyCore.seedDB.mySeed.hash)) /* not proxy */ &&
|
|
(
|
|
(yacyCore.seedDB.mySeed().isSenior()) ||
|
|
(yacyCore.seedDB.mySeed().isPrincipal())
|
|
) /* qualified */;
|
|
|
|
if ((!local)&&(!global)&&(!profile.handle().equals(this.sb.defaultRemoteProfile.handle()))) {
|
|
this.log.logSevere("URL '" + entry.url().toString() + "' can neither be crawled local nor global.");
|
|
}
|
|
|
|
// add the url into the crawling queue
|
|
sb.crawlQueues.noticeURL.push(
|
|
((global) ? plasmaCrawlNURL.STACK_TYPE_LIMIT :
|
|
((local) ? plasmaCrawlNURL.STACK_TYPE_CORE : plasmaCrawlNURL.STACK_TYPE_REMOTE)) /*local/remote stack*/,
|
|
entry);
|
|
return null;
|
|
}
|
|
|
|
}
|