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567 lines
25 KiB
567 lines
25 KiB
// Segment.java
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// (C) 2005-2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 2005 on http://yacy.net; full redesign for segments 28.5.2009
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2009-05-28 01:51:34 +0200 (Do, 28 Mai 2009) $
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// $LastChangedRevision: 5988 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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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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package de.anomic.search;
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import java.io.File;
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import java.io.IOException;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeSet;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.document.Condenser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.data.meta.URIMetadataRow;
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import net.yacy.kelondro.data.navigation.NavigationReference;
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import net.yacy.kelondro.data.navigation.NavigationReferenceFactory;
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import net.yacy.kelondro.data.word.Word;
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import net.yacy.kelondro.data.word.WordReference;
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import net.yacy.kelondro.data.word.WordReferenceFactory;
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import net.yacy.kelondro.data.word.WordReferenceRow;
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import net.yacy.kelondro.data.word.WordReferenceVars;
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import net.yacy.kelondro.index.HandleSet;
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import net.yacy.kelondro.index.RowSpaceExceededException;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.order.Base64Order;
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import net.yacy.kelondro.order.ByteOrder;
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import net.yacy.kelondro.rwi.IODispatcher;
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import net.yacy.kelondro.rwi.IndexCell;
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import net.yacy.kelondro.rwi.ReferenceContainer;
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import net.yacy.kelondro.rwi.ReferenceFactory;
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import net.yacy.kelondro.util.ISO639;
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import net.yacy.repository.Blacklist;
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import net.yacy.repository.LoaderDispatcher;
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import de.anomic.crawler.CrawlProfile;
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import de.anomic.crawler.retrieval.Response;
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public class Segment {
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// environment constants
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public static final long wCacheMaxAge = 1000 * 60 * 30; // milliseconds; 30 minutes
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public static final int wCacheMaxChunk = 800; // maximum number of references for each urlhash
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public static final int lowcachedivisor = 900;
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public static final long targetFileSize = 256 * 1024 * 1024; // 256 MB
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public static final int writeBufferSize = 4 * 1024 * 1024;
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// the reference factory
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public static final ReferenceFactory<WordReference> wordReferenceFactory = new WordReferenceFactory();
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public static final ReferenceFactory<NavigationReference> navigationReferenceFactory = new NavigationReferenceFactory();
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public static final ByteOrder wordOrder = Base64Order.enhancedCoder;
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private final Log log;
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protected final IndexCell<WordReference> termIndex;
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//private final IndexCell<NavigationReference> authorNavIndex;
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protected final MetadataRepository urlMetadata;
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private final File segmentPath;
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private final IODispatcher merger;
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public Segment(
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final Log log,
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final File segmentPath,
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final int entityCacheMaxSize,
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final long maxFileSize,
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final boolean useTailCache,
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final boolean exceed134217727) throws IOException {
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migrateTextIndex(segmentPath, segmentPath);
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migrateTextMetadata(segmentPath, segmentPath);
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log.logInfo("Initializing Segment '" + segmentPath + ".");
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this.log = log;
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this.segmentPath = segmentPath;
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this.merger = new IODispatcher(1, 1, writeBufferSize);
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this.merger.start();
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this.termIndex = new IndexCell<WordReference>(
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segmentPath,
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"text.index",
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wordReferenceFactory,
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wordOrder,
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WordReferenceRow.urlEntryRow,
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entityCacheMaxSize,
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targetFileSize,
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maxFileSize,
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this.merger,
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writeBufferSize);
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/*
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this.authorNavIndex = new IndexCell<NavigationReference>(
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new File(new File(segmentPath, "nav_author"), "idx"),
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navigationReferenceFactory,
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wordOrder,
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NavigationReferenceRow.navEntryRow,
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entityCacheMaxSize,
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targetFileSize,
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maxFileSize,
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this.merger,
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writeBufferSize);
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*/
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// create LURL-db
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urlMetadata = new MetadataRepository(segmentPath, "text.urlmd", useTailCache, exceed134217727);
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}
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public static void migrateTextIndex(File oldSegmentPath, File newSegmentPath) {
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File oldCellPath = new File(oldSegmentPath, "RICELL");
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if (!oldCellPath.exists()) return;
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String[] oldIndexFiles = oldCellPath.list();
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for (String oldIndexFile: oldIndexFiles) {
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if (oldIndexFile.startsWith("index.")) {
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File newFile = new File(newSegmentPath, "text.index." + oldIndexFile.substring(6));
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new File(oldCellPath, oldIndexFile).renameTo(newFile);
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}
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}
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oldCellPath.delete();
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}
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public static void migrateTextMetadata(File oldSegmentPath, File newSegmentPath) {
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File oldMetadataPath = new File(oldSegmentPath, "METADATA");
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if (!oldMetadataPath.exists()) return;
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String[] oldMetadataFiles = oldMetadataPath.list();
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for (String oldMetadataFile: oldMetadataFiles) {
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if (oldMetadataFile.startsWith("urls.")) {
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File newFile = new File(newSegmentPath, "text.urlmd." + oldMetadataFile.substring(5));
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new File(oldMetadataPath, oldMetadataFile).renameTo(newFile);
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}
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}
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oldMetadataPath.delete();
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}
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public MetadataRepository urlMetadata() {
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return this.urlMetadata;
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}
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public IndexCell<WordReference> termIndex() {
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return this.termIndex;
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}
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public void clear() {
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try {
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termIndex.clear();
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urlMetadata.clear();
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} catch (final IOException e) {
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Log.logException(e);
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}
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if (Switchboard.getSwitchboard() != null &&
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Switchboard.getSwitchboard().peers != null &&
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Switchboard.getSwitchboard().peers.mySeed() != null) Switchboard.getSwitchboard().peers.mySeed().resetCounters();
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}
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public File getLocation() {
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return this.segmentPath;
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}
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/**
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* this is called by the switchboard to put in a new page into the index
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* use all the words in one condenser object to simultanous create index entries
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*
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* @param url
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* @param urlModified
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* @param document
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* @param condenser
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* @param language
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* @param doctype
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* @param outlinksSame
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* @param outlinksOther
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* @return
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*/
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private int addPageIndex(
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final DigestURI url,
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final Date urlModified,
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final Document document,
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final Condenser condenser,
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final String language,
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final char doctype,
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final int outlinksSame,
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final int outlinksOther,
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final SearchEvent searchEvent,
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final String sourceName) {
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RankingProcess rankingProcess = (searchEvent == null) ? null : searchEvent.getRankingResult();
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if (rankingProcess != null) rankingProcess.moreFeeders(1);
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int wordCount = 0;
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final int urlLength = url.toNormalform(true, true).length();
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final int urlComps = MultiProtocolURI.urlComps(url.toString()).length;
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// iterate over all words of context text
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final Iterator<Map.Entry<String, Word>> i = condenser.words().entrySet().iterator();
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Map.Entry<String, Word> wentry;
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String word;
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int len = (document == null) ? urlLength : document.dc_title().length();
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WordReferenceRow ientry = new WordReferenceRow(new String(url.hash()),
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urlLength, urlComps, len,
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condenser.RESULT_NUMB_WORDS,
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condenser.RESULT_NUMB_SENTENCES,
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urlModified.getTime(),
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System.currentTimeMillis(),
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language,
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doctype,
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outlinksSame, outlinksOther);
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Word wprop;
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byte[] wordhash;
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while (i.hasNext()) {
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wentry = i.next();
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word = wentry.getKey();
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wprop = wentry.getValue();
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assert (wprop.flags != null);
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ientry.setWord(wprop);
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wordhash = Word.word2hash(word);
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try {
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this.termIndex.add(wordhash, ientry);
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} catch (Exception e) {
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Log.logException(e);
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}
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wordCount++;
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if (searchEvent != null && !searchEvent.getQuery().excludeHashes.has(wordhash) && searchEvent.getQuery().queryHashes.has(wordhash)) {
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ReferenceContainer<WordReference> container;
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try {
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container = ReferenceContainer.emptyContainer(Segment.wordReferenceFactory, wordhash, 1);
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container.add(ientry);
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} catch (RowSpaceExceededException e) {
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continue;
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}
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rankingProcess.add(container, true, sourceName, -1);
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}
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}
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if (rankingProcess != null) rankingProcess.oneFeederTerminated();
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return wordCount;
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}
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public void close() {
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if (this.merger != null) this.merger.terminate();
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termIndex.close();
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urlMetadata.close();
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}
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public URIMetadataRow storeDocument(
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final DigestURI url,
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final DigestURI referrerURL,
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Date modDate,
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final Date loadDate,
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final long sourcesize,
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final Document document,
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final Condenser condenser,
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final SearchEvent searchEvent,
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final String sourceName
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) throws IOException {
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final long startTime = System.currentTimeMillis();
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// CREATE INDEX
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// load some document metadata
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final String dc_title = document.dc_title();
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// do a identification of the language
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String language = condenser.language(); // this is a statistical analysation of the content: will be compared with other attributes
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String bymetadata = document.dc_language(); // the languageByMetadata may return null if there was no declaration
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if (language == null) {
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// no statistics available, we take either the metadata (if given) or the TLD
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language = (bymetadata == null) ? url.language() : bymetadata;
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if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + url + " FAILED, taking " + ((bymetadata == null) ? "TLD" : "metadata") + ": " + language);
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} else {
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if (bymetadata == null) {
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// two possible results: compare and report conflicts
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if (language.equals(url.language()))
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if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + url + " CONFIRMED - TLD IDENTICAL: " + language);
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else {
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String error = "LANGUAGE-BY-STATISTICS: " + url + " CONFLICTING: " + language + " (the language given by the TLD is " + url.language() + ")";
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// see if we have a hint in the url that the statistic was right
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String u = url.toNormalform(true, false).toLowerCase();
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if (!u.contains("/" + language + "/") && !u.contains("/" + ISO639.country(language).toLowerCase() + "/")) {
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// no confirmation using the url, use the TLD
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language = url.language();
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log.logWarning(error + ", corrected using the TLD");
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} else {
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// this is a strong hint that the statistics was in fact correct
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log.logWarning(error + ", but the url proves that the statistic is correct");
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}
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}
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} else {
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// here we have three results: we can do a voting
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if (language.equals(bymetadata)) {
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//if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + entry.url() + " CONFIRMED - METADATA IDENTICAL: " + language);
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} else if (language.equals(url.language())) {
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//if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + entry.url() + " CONFIRMED - TLD IS IDENTICAL: " + language);
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} else if (bymetadata.equals(url.language())) {
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//if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + entry.url() + " CONFLICTING: " + language + " BUT METADATA AND TLD ARE IDENTICAL: " + bymetadata + ")");
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language = bymetadata;
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} else {
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//if (log.isFine()) log.logFine("LANGUAGE-BY-STATISTICS: " + entry.url() + " CONFLICTING: ALL DIFFERENT! statistic: " + language + ", metadata: " + bymetadata + ", TLD: + " + entry.url().language() + ". taking metadata.");
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language = bymetadata;
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}
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}
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}
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// create a new loaded URL db entry
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if (modDate.getTime() > loadDate.getTime()) modDate = loadDate;
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final URIMetadataRow newEntry = new URIMetadataRow(
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url, // URL
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dc_title, // document description
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document.dc_creator(), // author
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document.dc_subject(' '), // tags
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document.dc_publisher(), // publisher (may be important to get location data)
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modDate, // modification date
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loadDate, // loaded date
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new Date(loadDate.getTime() + Math.max(0, loadDate.getTime() - modDate.getTime()) / 2), // freshdate, computed with Proxy-TTL formula
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(referrerURL == null) ? null : new String(referrerURL.hash()), // referer hash
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new byte[0], // md5
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(int) sourcesize, // size
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condenser.RESULT_NUMB_WORDS, // word count
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Response.docType(document.dc_format()), // doctype
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condenser.RESULT_FLAGS, // flags
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language, // language
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document.inboundLinks(), // inbound links
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document.outboundLinks(), // outbound links
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document.getAudiolinks().size(), // laudio
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document.getImages().size(), // limage
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document.getVideolinks().size(), // lvideo
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document.getApplinks().size() // lapp
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);
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// STORE URL TO LOADED-URL-DB
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urlMetadata.store(newEntry); // TODO: should be serialized; integrated in IODispatcher
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final long storageEndTime = System.currentTimeMillis();
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// STORE PAGE INDEX INTO WORD INDEX DB
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final int words = addPageIndex(
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url, // document url
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modDate, // document mod date
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document, // document content
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condenser, // document condenser
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language, // document language
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Response.docType(document.dc_format()), // document type
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document.inboundLinks(), // inbound links
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document.outboundLinks(), // outbound links
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searchEvent, // a search event that can have results directly
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sourceName // the name of the source where the index was created
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);
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final long indexingEndTime = System.currentTimeMillis();
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if (log.isInfo()) {
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// TODO: UTF-8 docDescription seems not to be displayed correctly because
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// of string concatenation
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log.logInfo("*Indexed " + words + " words in URL " + url +
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" [" + new String(url.hash()) + "]" +
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"\n\tDescription: " + dc_title +
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"\n\tMimeType: " + document.dc_format() + " | Charset: " + document.getCharset() + " | " +
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"Size: " + document.getTextLength() + " bytes | " +
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"Anchors: " + ((document.getAnchors() == null) ? 0 : document.getAnchors().size()) +
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"\n\tLinkStorageTime: " + (storageEndTime - startTime) + " ms | " +
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"indexStorageTime: " + (indexingEndTime - storageEndTime) + " ms");
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}
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// finished
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return newEntry;
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}
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// method for index deletion
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public int removeAllUrlReferences(final DigestURI url, LoaderDispatcher loader, final CrawlProfile.CacheStrategy cacheStrategy) {
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return removeAllUrlReferences(url.hash(), loader, cacheStrategy);
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}
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public void removeAllUrlReferences(final HandleSet urls, LoaderDispatcher loader, final CrawlProfile.CacheStrategy cacheStrategy) {
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for (byte[] urlhash: urls) removeAllUrlReferences(urlhash, loader, cacheStrategy);
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}
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/**
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* find all the words in a specific resource and remove the url reference from every word index
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* finally, delete the url entry
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* @param urlhash the hash of the url that shall be removed
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* @param loader
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* @param cacheStrategy
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* @return number of removed words
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*/
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public int removeAllUrlReferences(final byte[] urlhash, LoaderDispatcher loader, final CrawlProfile.CacheStrategy cacheStrategy) {
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if (urlhash == null) return 0;
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// determine the url string
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final URIMetadataRow entry = urlMetadata().load(urlhash, null, 0);
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if (entry == null) return 0;
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final URIMetadataRow.Components metadata = entry.metadata();
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if (metadata == null || metadata.url() == null) return 0;
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try {
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// parse the resource
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final Document document = Document.mergeDocuments(metadata.url(), null, loader.loadDocuments(loader.request(metadata.url(), true, false), cacheStrategy, 10000, Long.MAX_VALUE));
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if (document == null) {
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// delete just the url entry
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urlMetadata().remove(urlhash);
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return 0;
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}
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// get the word set
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Set<String> words = null;
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words = new Condenser(document, true, true, null).words().keySet();
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// delete all word references
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int count = 0;
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if (words != null) count = termIndex().remove(Word.words2hashesHandles(words), urlhash);
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// finally delete the url entry itself
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urlMetadata().remove(urlhash);
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return count;
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} catch (final Parser.Failure e) {
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return 0;
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} catch (IOException e) {
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Log.logException(e);
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return 0;
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}
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}
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// The Cleaner class was provided as "UrldbCleaner" by Hydrox
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public synchronized ReferenceCleaner getReferenceCleaner(final byte[] startHash) {
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return new ReferenceCleaner(startHash);
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}
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public class ReferenceCleaner extends Thread {
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private final byte[] startHash;
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private boolean run = true;
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private boolean pause = false;
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public int rwiCountAtStart = 0;
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public byte[] wordHashNow = null;
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public byte[] lastWordHash = null;
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public int lastDeletionCounter = 0;
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public ReferenceCleaner(final byte[] startHash) {
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this.startHash = startHash;
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this.rwiCountAtStart = termIndex().sizesMax();
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}
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public void run() {
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Log.logInfo("INDEXCLEANER", "IndexCleaner-Thread started");
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ReferenceContainer<WordReference> container = null;
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WordReferenceVars entry = null;
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DigestURI url = null;
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final HandleSet urlHashs = new HandleSet(URIMetadataRow.rowdef.primaryKeyLength, URIMetadataRow.rowdef.objectOrder, 0);
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try {
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Iterator<ReferenceContainer<WordReference>> indexContainerIterator = termIndex.references(startHash, false, 100, false).iterator();
|
|
while (indexContainerIterator.hasNext() && run) {
|
|
waiter();
|
|
container = indexContainerIterator.next();
|
|
final Iterator<WordReference> containerIterator = container.entries();
|
|
wordHashNow = container.getTermHash();
|
|
while (containerIterator.hasNext() && run) {
|
|
waiter();
|
|
entry = new WordReferenceVars(containerIterator.next());
|
|
// System.out.println("Wordhash: "+wordHash+" UrlHash:
|
|
// "+entry.getUrlHash());
|
|
final URIMetadataRow ue = urlMetadata.load(entry.metadataHash(), entry, 0);
|
|
if (ue == null) {
|
|
urlHashs.put(entry.metadataHash());
|
|
} else {
|
|
url = ue.metadata().url();
|
|
if (url == null || Switchboard.urlBlacklist.isListed(Blacklist.BLACKLIST_CRAWLER, url)) {
|
|
urlHashs.put(entry.metadataHash());
|
|
}
|
|
}
|
|
}
|
|
if (!urlHashs.isEmpty()) try {
|
|
final int removed = termIndex.remove(container.getTermHash(), urlHashs);
|
|
Log.logFine("INDEXCLEANER", new String(container.getTermHash()) + ": " + removed + " of " + container.size() + " URL-entries deleted");
|
|
lastWordHash = container.getTermHash();
|
|
lastDeletionCounter = urlHashs.size();
|
|
urlHashs.clear();
|
|
} catch (IOException e) {
|
|
Log.logException(e);
|
|
}
|
|
|
|
if (!containerIterator.hasNext()) {
|
|
// We may not be finished yet, try to get the next chunk of wordHashes
|
|
final TreeSet<ReferenceContainer<WordReference>> containers = termIndex.references(container.getTermHash(), false, 100, false);
|
|
indexContainerIterator = containers.iterator();
|
|
// Make sure we don't get the same wordhash twice, but don't skip a word
|
|
if ((indexContainerIterator.hasNext()) && (!container.getTermHash().equals(indexContainerIterator.next().getTermHash()))) {
|
|
indexContainerIterator = containers.iterator();
|
|
}
|
|
}
|
|
}
|
|
} catch (final IOException e) {
|
|
Log.logException(e);
|
|
} catch (final Exception e) {
|
|
Log.logException(e);
|
|
}
|
|
Log.logInfo("INDEXCLEANER", "IndexCleaner-Thread stopped");
|
|
}
|
|
|
|
public void abort() {
|
|
synchronized(this) {
|
|
run = false;
|
|
this.notifyAll();
|
|
}
|
|
}
|
|
|
|
public void pause() {
|
|
synchronized (this) {
|
|
if (!pause) {
|
|
pause = true;
|
|
Log.logInfo("INDEXCLEANER", "IndexCleaner-Thread paused");
|
|
}
|
|
}
|
|
}
|
|
|
|
public void endPause() {
|
|
synchronized (this) {
|
|
if (pause) {
|
|
pause = false;
|
|
this.notifyAll();
|
|
Log.logInfo("INDEXCLEANER", "IndexCleaner-Thread resumed");
|
|
}
|
|
}
|
|
}
|
|
|
|
public void waiter() {
|
|
synchronized (this) {
|
|
if (this.pause) {
|
|
try {
|
|
this.wait();
|
|
} catch (final InterruptedException e) {
|
|
this.run = false;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public int rwisize() {
|
|
return termIndex().sizesMax();
|
|
}
|
|
|
|
public int urlsize() {
|
|
return urlMetadata().size();
|
|
}
|
|
}
|
|
}
|