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b6fb239e74
some file types are containers for several files. These containers had been parsed in such a way that the set of resulting parsed content was merged into one single document before parsing. Using this parser infrastructure it is not possible to parse document containers that contain individual files. An example is a rss file where the rss messages can be treated as individual documents with their own url reference. Another example is a surrogate file which was treated with a special operation outside of the parser infrastructure. This commit introduces a redesigned parser interface and a new abstract parser implementation. The new parser interface has now only one entry point and returns always a set of parsed documents. In case of single documents the parser method returns a set of one documents. To be compliant with the new interface, the zip and tar parser had been also completely redesigned. All parsers are now much more simple and cleaner in its structure. The switchboard operations had been extended to operate with sets of parsed files, not single parsed files. additionally, parsing of jar manifest files had been added. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6955 6c8d7289-2bf4-0310-a012-ef5d649a1542
567 lines
25 KiB
Java
567 lines
25 KiB
Java
// 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.io.UnsupportedEncodingException;
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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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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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searchEvent.getRankingResult().add(container, false, -1);
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}
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}
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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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) 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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);
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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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try {
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words = new Condenser(document, true, true).words().keySet();
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} catch (final UnsupportedEncodingException e) {
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Log.logException(e);
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}
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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 {
|
|
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();
|
|
}
|
|
}
|
|
}
|