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842 lines
41 KiB
842 lines
41 KiB
// plasmaSearchEvent.java
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// (C) 2005 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 10.10.2005 on http://yacy.net
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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: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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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.plasma;
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import java.io.UnsupportedEncodingException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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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.TreeMap;
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import java.util.TreeSet;
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import de.anomic.index.indexContainer;
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import de.anomic.index.indexRWIEntry;
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import de.anomic.index.indexURLEntry;
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import de.anomic.kelondro.kelondroBitfield;
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import de.anomic.kelondro.kelondroMSetTools;
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import de.anomic.plasma.plasmaSnippetCache.MediaSnippet;
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import de.anomic.server.serverProfiling;
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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.yacyDHTAction;
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import de.anomic.yacy.yacySearch;
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import de.anomic.yacy.yacySeed;
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import de.anomic.yacy.yacyURL;
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public final class plasmaSearchEvent {
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public static final String COLLECTION = "collection";
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public static final String JOIN = "join";
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public static final String PRESORT = "presort";
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public static final String URLFETCH = "urlfetch";
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public static final String NORMALIZING = "normalizing";
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public static int workerThreadCount = 8;
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public static String lastEventID = "";
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private static HashMap<String, plasmaSearchEvent> lastEvents = new HashMap<String, plasmaSearchEvent>(); // a cache for objects from this class: re-use old search requests
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public static final long eventLifetime = 600000; // the time an event will stay in the cache, 10 Minutes
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private static final int max_results_preparation = 200;
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private long eventTime;
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private plasmaSearchQuery query;
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private plasmaWordIndex wordIndex;
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private plasmaSearchRankingProcess rankedCache; // ordered search results, grows dynamically as all the query threads enrich this container
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private Map<String, TreeMap<String, String>> rcAbstracts; // cache for index abstracts; word:TreeMap mapping where the embedded TreeMap is a urlhash:peerlist relation
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private yacySearch[] primarySearchThreads, secondarySearchThreads;
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private Thread localSearchThread;
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private TreeMap<String, String> preselectedPeerHashes;
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//private Object[] references;
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public TreeMap<String, String> IAResults;
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public TreeMap<String, Integer> IACount;
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public String IAmaxcounthash, IAneardhthash;
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private int localcount;
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private resultWorker[] workerThreads;
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private ArrayList<ResultEntry> resultList;
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//private int resultListLock; // a pointer that shows that all elements below this pointer are fixed and may not be changed again
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private HashMap<String, String> failedURLs; // a mapping from a urlhash to a fail reason string
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TreeSet<String> snippetFetchWordHashes; // a set of word hashes that are used to match with the snippets
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private long urlRetrievalAllTime;
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private long snippetComputationAllTime;
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@SuppressWarnings("unchecked")
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private plasmaSearchEvent(plasmaSearchQuery query,
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plasmaWordIndex wordIndex,
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TreeMap<String, String> preselectedPeerHashes,
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boolean generateAbstracts) {
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this.eventTime = System.currentTimeMillis(); // for lifetime check
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this.wordIndex = wordIndex;
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this.query = query;
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this.rcAbstracts = (query.queryHashes.size() > 1) ? new TreeMap<String, TreeMap<String, String>>() : null; // generate abstracts only for combined searches
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this.primarySearchThreads = null;
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this.secondarySearchThreads = null;
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this.preselectedPeerHashes = preselectedPeerHashes;
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this.IAResults = new TreeMap<String, String>();
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this.IACount = new TreeMap<String, Integer>();
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this.IAmaxcounthash = null;
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this.IAneardhthash = null;
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this.localcount = 0;
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this.urlRetrievalAllTime = 0;
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this.snippetComputationAllTime = 0;
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this.workerThreads = null;
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this.resultList = new ArrayList<ResultEntry>(10); // this is the result set which is filled up with search results, enriched with snippets
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//this.resultListLock = 0; // no locked elements until now
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this.failedURLs = new HashMap<String, String>(); // a map of urls to reason strings where a worker thread tried to work on, but failed.
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// snippets do not need to match with the complete query hashes,
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// only with the query minus the stopwords which had not been used for the search
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final TreeSet<String> filtered = kelondroMSetTools.joinConstructive(query.queryHashes, plasmaSwitchboard.stopwords);
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this.snippetFetchWordHashes = (TreeSet<String>) query.queryHashes.clone();
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if ((filtered != null) && (filtered.size() > 0)) {
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kelondroMSetTools.excludeDestructive(this.snippetFetchWordHashes, plasmaSwitchboard.stopwords);
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}
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long start = System.currentTimeMillis();
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if ((query.domType == plasmaSearchQuery.SEARCHDOM_GLOBALDHT) ||
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(query.domType == plasmaSearchQuery.SEARCHDOM_CLUSTERALL)) {
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// do a global search
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this.rankedCache = new plasmaSearchRankingProcess(wordIndex, query, 2, max_results_preparation);
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int fetchpeers = (int) (query.maximumTime / 500L); // number of target peers; means 10 peers in 10 seconds
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if (fetchpeers > 50) fetchpeers = 50;
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if (fetchpeers < 30) fetchpeers = 30;
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// the result of the fetch is then in the rcGlobal
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long timer = System.currentTimeMillis();
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serverLog.logFine("SEARCH_EVENT", "STARTING " + fetchpeers + " THREADS TO CATCH EACH " + query.displayResults() + " URLs");
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this.primarySearchThreads = yacySearch.primaryRemoteSearches(
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plasmaSearchQuery.hashSet2hashString(query.queryHashes),
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plasmaSearchQuery.hashSet2hashString(query.excludeHashes),
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"",
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query.prefer,
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query.urlMask,
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query.displayResults(),
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query.maxDistance,
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wordIndex,
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rankedCache,
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rcAbstracts,
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fetchpeers,
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plasmaSwitchboard.urlBlacklist,
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query.ranking,
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query.constraint,
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(query.domType == plasmaSearchQuery.SEARCHDOM_GLOBALDHT) ? null : preselectedPeerHashes);
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serverProfiling.update("SEARCH", new plasmaProfiling.searchEvent(query.id(true), "remote search thread start", this.primarySearchThreads.length, System.currentTimeMillis() - timer));
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// meanwhile do a local search
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localSearchThread = new localSearchProcess();
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localSearchThread.start();
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// finished searching
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serverLog.logFine("SEARCH_EVENT", "SEARCH TIME AFTER GLOBAL-TRIGGER TO " + primarySearchThreads.length + " PEERS: " + ((System.currentTimeMillis() - start) / 1000) + " seconds");
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} else {
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// do a local search
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this.rankedCache = new plasmaSearchRankingProcess(wordIndex, query, 2, max_results_preparation);
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this.rankedCache.execQuery(true);
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this.localcount = this.rankedCache.filteredCount();
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//plasmaWordIndex.Finding finding = wordIndex.retrieveURLs(query, false, 2, ranking, process);
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if (generateAbstracts) {
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// compute index abstracts
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long timer = System.currentTimeMillis();
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Iterator<Map.Entry<String, indexContainer>> ci = this.rankedCache.searchContainerMaps()[0].entrySet().iterator();
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Map.Entry<String, indexContainer> entry;
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int maxcount = -1;
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double mindhtdistance = 1.1, d;
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String wordhash;
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while (ci.hasNext()) {
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entry = ci.next();
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wordhash = entry.getKey();
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indexContainer container = entry.getValue();
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assert (container.getWordHash().equals(wordhash));
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if (container.size() > maxcount) {
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IAmaxcounthash = wordhash;
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maxcount = container.size();
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}
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d = yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed().hash, wordhash);
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if (d < mindhtdistance) {
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// calculate the word hash that is closest to our dht position
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mindhtdistance = d;
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IAneardhthash = wordhash;
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}
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IACount.put(wordhash, new Integer(container.size()));
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IAResults.put(wordhash, indexContainer.compressIndex(container, null, 1000).toString());
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}
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serverProfiling.update("SEARCH", new plasmaProfiling.searchEvent(query.id(true), "abstract generation", this.rankedCache.searchContainerMaps()[0].size(), System.currentTimeMillis() - timer));
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}
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}
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if (query.onlineSnippetFetch) {
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// start worker threads to fetch urls and snippets
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this.workerThreads = new resultWorker[workerThreadCount];
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for (int i = 0; i < workerThreadCount; i++) {
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this.workerThreads[i] = new resultWorker(i, query.maximumTime * 3);
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this.workerThreads[i].start();
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}
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} else {
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// prepare result vector directly without worker threads
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long timer = System.currentTimeMillis();
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indexURLEntry uentry;
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ResultEntry resultEntry;
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yacyURL url;
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synchronized (rankedCache) {
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while ((rankedCache.size() > 0) && ((uentry = rankedCache.bestURL(true)) != null) && (resultList.size() < (query.neededResults()))) {
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url = uentry.comp().url();
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if (url == null) continue;
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//System.out.println("***DEBUG*** SEARCH RESULT URL=" + url.toNormalform(false, false));
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resultEntry = obtainResultEntry(uentry, (snippetComputationAllTime < 300) ? 1 : 0);
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if (resultEntry == null) continue; // the entry had some problems, cannot be used
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urlRetrievalAllTime += resultEntry.dbRetrievalTime;
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snippetComputationAllTime += resultEntry.snippetComputationTime;
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// place the result to the result vector
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synchronized (resultList) {
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resultList.add(resultEntry);
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}
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// add references
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synchronized (rankedCache) {
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rankedCache.addReferences(resultEntry);
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}
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}
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}
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serverProfiling.update("SEARCH", new plasmaProfiling.searchEvent(query.id(true), "offline snippet fetch", resultList.size(), System.currentTimeMillis() - timer));
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}
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// clean up events
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cleanupEvents(false);
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// store this search to a cache so it can be re-used
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lastEvents.put(query.id(false), this);
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lastEventID = query.id(false);
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}
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private class localSearchProcess extends Thread {
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public localSearchProcess() {
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}
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public void run() {
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// do a local search
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// sort the local containers and truncate it to a limited count,
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// so following sortings together with the global results will be fast
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synchronized (rankedCache) {
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rankedCache.execQuery(true);
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localcount = rankedCache.filteredCount();
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}
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}
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}
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public static void cleanupEvents(boolean all) {
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// remove old events in the event cache
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Iterator<plasmaSearchEvent> i = lastEvents.values().iterator();
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plasmaSearchEvent cleanEvent;
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while (i.hasNext()) {
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cleanEvent = i.next();
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if ((all) || (cleanEvent.eventTime + eventLifetime < System.currentTimeMillis())) {
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// execute deletion of failed words
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Set<String> removeWords = cleanEvent.query.queryHashes;
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removeWords.addAll(cleanEvent.query.excludeHashes);
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cleanEvent.wordIndex.removeEntriesMultiple(removeWords, cleanEvent.failedURLs.keySet());
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serverLog.logInfo("SearchEvents", "cleaning up event " + cleanEvent.query.id(true) + ", removed " + cleanEvent.failedURLs.size() + " URL references on " + removeWords.size() + " words");
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// remove the event
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i.remove();
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}
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}
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}
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private ResultEntry obtainResultEntry(indexURLEntry page, int snippetFetchMode) {
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// a search result entry needs some work to produce a result Entry:
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// - check if url entry exists in LURL-db
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// - check exclusions, constraints, masks, media-domains
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// - load snippet (see if page exists) and check if snippet contains searched word
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// Snippet Fetching can has 3 modes:
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// 0 - do not fetch snippets
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// 1 - fetch snippets offline only
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// 2 - online snippet fetch
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// load only urls if there was not yet a root url of that hash
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// find the url entry
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long startTime = System.currentTimeMillis();
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indexURLEntry.Components comp = page.comp();
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String pagetitle = comp.title().toLowerCase();
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if (comp.url() == null) {
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registerFailure(page.hash(), "url corrupted (null)");
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return null; // rare case where the url is corrupted
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}
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String pageurl = comp.url().toString().toLowerCase();
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String pageauthor = comp.author().toLowerCase();
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long dbRetrievalTime = System.currentTimeMillis() - startTime;
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// check exclusion
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if ((plasmaSearchQuery.matches(pagetitle, query.excludeHashes)) ||
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(plasmaSearchQuery.matches(pageurl, query.excludeHashes)) ||
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(plasmaSearchQuery.matches(pageauthor, query.excludeHashes))) {
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return null;
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}
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// check url mask
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if (!(pageurl.matches(query.urlMask))) {
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return null;
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}
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// check constraints
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if ((query.constraint != null) &&
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(query.constraint.get(plasmaCondenser.flag_cat_indexof)) &&
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(!(comp.title().startsWith("Index of")))) {
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final Iterator<String> wi = query.queryHashes.iterator();
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while (wi.hasNext()) wordIndex.removeEntry((String) wi.next(), page.hash());
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registerFailure(page.hash(), "index-of constraint not fullfilled");
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return null;
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}
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if ((query.contentdom == plasmaSearchQuery.CONTENTDOM_AUDIO) && (page.laudio() == 0)) {
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registerFailure(page.hash(), "contentdom-audio constraint not fullfilled");
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return null;
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}
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if ((query.contentdom == plasmaSearchQuery.CONTENTDOM_VIDEO) && (page.lvideo() == 0)) {
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registerFailure(page.hash(), "contentdom-video constraint not fullfilled");
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return null;
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}
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if ((query.contentdom == plasmaSearchQuery.CONTENTDOM_IMAGE) && (page.limage() == 0)) {
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registerFailure(page.hash(), "contentdom-image constraint not fullfilled");
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return null;
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}
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if ((query.contentdom == plasmaSearchQuery.CONTENTDOM_APP) && (page.lapp() == 0)) {
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registerFailure(page.hash(), "contentdom-app constraint not fullfilled");
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return null;
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}
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if (snippetFetchMode == 0) {
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return new ResultEntry(page, wordIndex, null, null, dbRetrievalTime, 0); // result without snippet
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}
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// load snippet
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if (query.contentdom == plasmaSearchQuery.CONTENTDOM_TEXT) {
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// attach text snippet
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startTime = System.currentTimeMillis();
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plasmaSnippetCache.TextSnippet snippet = plasmaSnippetCache.retrieveTextSnippet(comp.url(), snippetFetchWordHashes, (snippetFetchMode == 2), ((query.constraint != null) && (query.constraint.get(plasmaCondenser.flag_cat_indexof))), 180, 3000, (snippetFetchMode == 2) ? Integer.MAX_VALUE : 100000);
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long snippetComputationTime = System.currentTimeMillis() - startTime;
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serverLog.logInfo("SEARCH_EVENT", "text snippet load time for " + comp.url() + ": " + snippetComputationTime + ", " + ((snippet.getErrorCode() < 11) ? "snippet found" : ("no snippet found (" + snippet.getError() + ")")));
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if (snippet.getErrorCode() < 11) {
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// we loaded the file and found the snippet
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return new ResultEntry(page, wordIndex, snippet, null, dbRetrievalTime, snippetComputationTime); // result with snippet attached
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} else if (snippetFetchMode == 1) {
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// we did not demand online loading, therefore a failure does not mean that the missing snippet causes a rejection of this result
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// this may happen during a remote search, because snippet loading is omitted to retrieve results faster
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return new ResultEntry(page, wordIndex, null, null, dbRetrievalTime, snippetComputationTime); // result without snippet
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} else {
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// problems with snippet fetch
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registerFailure(page.hash(), "no text snippet for URL " + comp.url());
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plasmaSnippetCache.failConsequences(snippet, query.id(false));
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return null;
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}
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} else {
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// attach media information
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startTime = System.currentTimeMillis();
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ArrayList<MediaSnippet> mediaSnippets = plasmaSnippetCache.retrieveMediaSnippets(comp.url(), snippetFetchWordHashes, query.contentdom, (snippetFetchMode == 2), 6000);
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long snippetComputationTime = System.currentTimeMillis() - startTime;
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serverLog.logInfo("SEARCH_EVENT", "media snippet load time for " + comp.url() + ": " + snippetComputationTime);
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if ((mediaSnippets != null) && (mediaSnippets.size() > 0)) {
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// found media snippets, return entry
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return new ResultEntry(page, wordIndex, null, mediaSnippets, dbRetrievalTime, snippetComputationTime);
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} else if (snippetFetchMode == 1) {
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return new ResultEntry(page, wordIndex, null, null, dbRetrievalTime, snippetComputationTime);
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} else {
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// problems with snippet fetch
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registerFailure(page.hash(), "no media snippet for URL " + comp.url());
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return null;
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}
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}
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// finished, no more actions possible here
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}
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private boolean anyWorkerAlive() {
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if (this.workerThreads == null) return false;
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for (int i = 0; i < workerThreadCount; i++) {
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if ((this.workerThreads[i] != null) &&
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(this.workerThreads[i].isAlive()) &&
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(this.workerThreads[i].busytime() < 3000)) return true;
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}
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return false;
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}
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private boolean anyRemoteSearchAlive() {
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// check primary search threads
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if ((this.primarySearchThreads != null) && (this.primarySearchThreads.length != 0)) {
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for (int i = 0; i < this.primarySearchThreads.length; i++) {
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if ((this.primarySearchThreads[i] != null) && (this.primarySearchThreads[i].isAlive())) return true;
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}
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}
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// maybe a secondary search thread is alive, check this
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if ((this.secondarySearchThreads != null) && (this.secondarySearchThreads.length != 0)) {
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for (int i = 0; i < this.secondarySearchThreads.length; i++) {
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if ((this.secondarySearchThreads[i] != null) && (this.secondarySearchThreads[i].isAlive())) return true;
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}
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}
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return false;
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}
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public plasmaSearchQuery getQuery() {
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return query;
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}
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public yacySearch[] getPrimarySearchThreads() {
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return primarySearchThreads;
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}
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public yacySearch[] getSecondarySearchThreads() {
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return secondarySearchThreads;
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}
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public int getLocalCount() {
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return this.localcount;
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}
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public int getGlobalCount() {
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return this.rankedCache.getGlobalCount();
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}
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public long getURLRetrievalTime() {
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return this.urlRetrievalAllTime;
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}
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public long getSnippetComputationTime() {
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return this.snippetComputationAllTime;
|
|
}
|
|
|
|
public static plasmaSearchEvent getEvent(String eventID) {
|
|
synchronized (lastEvents) {
|
|
return (plasmaSearchEvent) lastEvents.get(eventID);
|
|
}
|
|
}
|
|
|
|
public static plasmaSearchEvent getEvent(plasmaSearchQuery query,
|
|
plasmaSearchRankingProfile ranking,
|
|
plasmaWordIndex wordIndex,
|
|
TreeMap<String, String> preselectedPeerHashes,
|
|
boolean generateAbstracts) {
|
|
synchronized (lastEvents) {
|
|
plasmaSearchEvent event = (plasmaSearchEvent) lastEvents.get(query.id(false));
|
|
if (event == null) {
|
|
event = new plasmaSearchEvent(query, wordIndex, preselectedPeerHashes, generateAbstracts);
|
|
} else {
|
|
//re-new the event time for this event, so it is not deleted next time too early
|
|
event.eventTime = System.currentTimeMillis();
|
|
// replace the query, because this contains the current result offset
|
|
event.query = query;
|
|
}
|
|
|
|
// if worker threads had been alive, but did not succeed, start them again to fetch missing links
|
|
if ((query.onlineSnippetFetch) &&
|
|
(!event.anyWorkerAlive()) &&
|
|
(event.resultList.size() < query.neededResults() + 10) &&
|
|
((event.getLocalCount() + event.getGlobalCount()) > event.resultList.size())) {
|
|
// set new timeout
|
|
event.eventTime = System.currentTimeMillis();
|
|
// start worker threads to fetch urls and snippets
|
|
event.workerThreads = new resultWorker[workerThreadCount];
|
|
for (int i = 0; i < workerThreadCount; i++) {
|
|
event.workerThreads[i] = event.deployWorker(i, 3 * query.maximumTime);
|
|
}
|
|
}
|
|
|
|
return event;
|
|
}
|
|
|
|
}
|
|
|
|
private resultWorker deployWorker(int id, long lifetime) {
|
|
resultWorker worker = new resultWorker(id, lifetime);
|
|
worker.start();
|
|
return worker;
|
|
}
|
|
|
|
private class resultWorker extends Thread {
|
|
|
|
private long timeout; // the date until this thread should try to work
|
|
private long sleeptime; // the sleeptime of this thread at the beginning of its life
|
|
private long lastLifeSign; // when the last time the run()-loop was executed
|
|
private int id;
|
|
|
|
public resultWorker(int id, long maxlifetime) {
|
|
this.id = id;
|
|
this.lastLifeSign = System.currentTimeMillis();
|
|
this.timeout = System.currentTimeMillis() + Math.max(1000, maxlifetime);
|
|
this.sleeptime = Math.min(300, maxlifetime / 10 * id);
|
|
}
|
|
|
|
public void run() {
|
|
|
|
// start fetching urls and snippets
|
|
indexURLEntry page;
|
|
while (System.currentTimeMillis() < this.timeout) {
|
|
this.lastLifeSign = System.currentTimeMillis();
|
|
|
|
if (resultList.size() >= query.neededResults() + query.displayResults()) break; // we have enough
|
|
|
|
// get next entry
|
|
page = rankedCache.bestURL(true);
|
|
if (page == null) {
|
|
if (!anyRemoteSearchAlive()) break; // we cannot expect more results
|
|
// if we did not get another entry, sleep some time and try again
|
|
try {Thread.sleep(100);} catch (InterruptedException e1) {}
|
|
continue;
|
|
}
|
|
if (anyResultWith(page.hash())) continue;
|
|
if (anyFailureWith(page.hash())) continue;
|
|
|
|
// try secondary search
|
|
prepareSecondarySearch(); // will be executed only once
|
|
|
|
ResultEntry resultEntry = obtainResultEntry(page, 2);
|
|
if (resultEntry == null) continue; // the entry had some problems, cannot be used
|
|
urlRetrievalAllTime += resultEntry.dbRetrievalTime;
|
|
snippetComputationAllTime += resultEntry.snippetComputationTime;
|
|
//System.out.println("+++DEBUG-resultWorker+++ fetched " + resultEntry.urlstring());
|
|
|
|
// place the result to the result vector
|
|
synchronized (resultList) {
|
|
resultList.add(resultEntry);
|
|
}
|
|
|
|
// add references
|
|
synchronized (rankedCache) {
|
|
rankedCache.addReferences(resultEntry);
|
|
}
|
|
//System.out.println("DEBUG SNIPPET_LOADING: thread " + id + " got " + resultEntry.url());
|
|
|
|
if (resultList.size() >= query.neededResults() + query.displayResults()) break; // we have enough
|
|
|
|
// sleep first to give remote loading threads a chance to fetch entries
|
|
if (anyRemoteSearchAlive()) try {Thread.sleep(this.sleeptime);} catch (InterruptedException e1) {}
|
|
}
|
|
serverLog.logInfo("SEARCH", "resultWorker thread " + id + " terminated");
|
|
}
|
|
|
|
private boolean anyResultWith(String urlhash) {
|
|
for (int i = 0; i < resultList.size(); i++) {
|
|
if (((ResultEntry) resultList.get(i)).urlentry.hash().equals(urlhash)) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private boolean anyFailureWith(String urlhash) {
|
|
return (failedURLs.get(urlhash) != null);
|
|
}
|
|
|
|
public long busytime() {
|
|
return System.currentTimeMillis() - this.lastLifeSign;
|
|
}
|
|
}
|
|
|
|
private void registerFailure(String urlhash, String reason) {
|
|
this.failedURLs.put(urlhash, reason);
|
|
serverLog.logInfo("search", "sorted out hash " + urlhash + " during search: " + reason);
|
|
}
|
|
|
|
public ResultEntry oneResult(int item) {
|
|
// first sleep a while to give accumulation threads a chance to work
|
|
if (anyWorkerAlive()) {
|
|
long sleeptime = Math.min(600, this.eventTime + (this.query.maximumTime / this.query.displayResults() * ((item % this.query.displayResults()) + 1)) - System.currentTimeMillis());
|
|
if (this.resultList.size() <= item + 10) sleeptime = Math.min(sleeptime + 300, 600);
|
|
if (sleeptime > 0) try {Thread.sleep(sleeptime);} catch (InterruptedException e) {}
|
|
//System.out.println("+++DEBUG-oneResult+++ (1) sleeping " + sleeptime);
|
|
|
|
// then sleep until any result is available (that should not happen)
|
|
while ((this.resultList.size() <= item) && (anyWorkerAlive())) {
|
|
try {Thread.sleep(100);} catch (InterruptedException e) {}
|
|
//System.out.println("+++DEBUG-oneResult+++ (2) sleeping " + 100);
|
|
}
|
|
|
|
}
|
|
// finally, if there is something, return the result
|
|
synchronized (this.resultList) {
|
|
// check if we have enough entries
|
|
if (this.resultList.size() <= item) return null;
|
|
|
|
// fetch the best entry from the resultList, not the entry from item position
|
|
// whenever a specific entry was switched in its position and was returned here
|
|
// a moving pointer is set to assign that item position as not changeable
|
|
int bestpick = item; //postRankingFavourite(item);
|
|
if (bestpick != item) {
|
|
// switch the elements
|
|
ResultEntry buf = (ResultEntry) this.resultList.get(bestpick);
|
|
serverLog.logInfo("SEARCH_POSTRANKING", "prefering [" + bestpick + "] " + buf.urlstring() + " over [" + item + "] " + ((ResultEntry) this.resultList.get(item)).urlstring());
|
|
this.resultList.set(bestpick, (ResultEntry) this.resultList.get(item));
|
|
this.resultList.set(item, buf);
|
|
}
|
|
|
|
//this.resultListLock = item; // lock the element; be prepared to return it
|
|
return (ResultEntry) this.resultList.get(item);
|
|
}
|
|
}
|
|
|
|
public ArrayList<ResultEntry> completeResults(long waitingtime) {
|
|
long timeout = System.currentTimeMillis() + waitingtime;
|
|
while ((this.resultList.size() < query.neededResults()) && (anyWorkerAlive()) && (System.currentTimeMillis() < timeout)) {
|
|
try {Thread.sleep(200);} catch (InterruptedException e) {}
|
|
//System.out.println("+++DEBUG-completeResults+++ sleeping " + 200);
|
|
}
|
|
return this.resultList;
|
|
}
|
|
|
|
boolean secondarySearchStartet = false;
|
|
|
|
private void prepareSecondarySearch() {
|
|
if (secondarySearchStartet) return; // dont do this twice
|
|
|
|
if ((rcAbstracts == null) || (rcAbstracts.size() != query.queryHashes.size())) return; // secondary search not possible (yet)
|
|
this.secondarySearchStartet = true;
|
|
|
|
/*
|
|
// catch up index abstracts and join them; then call peers again to submit their urls
|
|
System.out.println("DEBUG-INDEXABSTRACT: " + rcAbstracts.size() + " word references catched, " + query.queryHashes.size() + " needed");
|
|
|
|
Iterator i = rcAbstracts.entrySet().iterator();
|
|
Map.Entry entry;
|
|
while (i.hasNext()) {
|
|
entry = (Map.Entry) i.next();
|
|
System.out.println("DEBUG-INDEXABSTRACT: hash " + (String) entry.getKey() + ": " + ((query.queryHashes.contains((String) entry.getKey())) ? "NEEDED" : "NOT NEEDED") + "; " + ((TreeMap) entry.getValue()).size() + " entries");
|
|
}
|
|
*/
|
|
TreeMap<String, String> abstractJoin = (rcAbstracts.size() == query.queryHashes.size()) ? kelondroMSetTools.joinConstructive(rcAbstracts.values(), true) : new TreeMap<String, String>();
|
|
if (abstractJoin.size() == 0) {
|
|
//System.out.println("DEBUG-INDEXABSTRACT: no success using index abstracts from remote peers");
|
|
} else {
|
|
//System.out.println("DEBUG-INDEXABSTRACT: index abstracts delivered " + abstractJoin.size() + " additional results for secondary search");
|
|
// generate query for secondary search
|
|
TreeMap<String, String> secondarySearchURLs = new TreeMap<String, String>(); // a (peerhash:urlhash-liststring) mapping
|
|
Iterator<Map.Entry<String, String>> i1 = abstractJoin.entrySet().iterator();
|
|
Map.Entry<String, String> entry1;
|
|
String url, urls, peer, peers;
|
|
String mypeerhash = yacyCore.seedDB.mySeed().hash;
|
|
boolean mypeerinvolved = false;
|
|
int mypeercount;
|
|
while (i1.hasNext()) {
|
|
entry1 = i1.next();
|
|
url = entry1.getKey();
|
|
peers = entry1.getValue();
|
|
//System.out.println("DEBUG-INDEXABSTRACT: url " + url + ": from peers " + peers);
|
|
mypeercount = 0;
|
|
for (int j = 0; j < peers.length(); j = j + 12) {
|
|
peer = peers.substring(j, j + 12);
|
|
if ((peer.equals(mypeerhash)) && (mypeercount++ > 1)) continue;
|
|
//if (peers.indexOf(peer) < j) continue; // avoid doubles that may appear in the abstractJoin
|
|
urls = (String) secondarySearchURLs.get(peer);
|
|
urls = (urls == null) ? url : urls + url;
|
|
secondarySearchURLs.put(peer, urls);
|
|
}
|
|
if (mypeercount == 1) mypeerinvolved = true;
|
|
}
|
|
|
|
// compute words for secondary search and start the secondary searches
|
|
i1 = secondarySearchURLs.entrySet().iterator();
|
|
String words;
|
|
secondarySearchThreads = new yacySearch[(mypeerinvolved) ? secondarySearchURLs.size() - 1 : secondarySearchURLs.size()];
|
|
int c = 0;
|
|
while (i1.hasNext()) {
|
|
entry1 = i1.next();
|
|
peer = entry1.getKey();
|
|
if (peer.equals(mypeerhash)) continue; // we dont need to ask ourself
|
|
urls = (String) entry1.getValue();
|
|
words = wordsFromPeer(peer, urls);
|
|
//System.out.println("DEBUG-INDEXABSTRACT ***: peer " + peer + " has urls: " + urls);
|
|
//System.out.println("DEBUG-INDEXABSTRACT ***: peer " + peer + " from words: " + words);
|
|
secondarySearchThreads[c++] = yacySearch.secondaryRemoteSearch(
|
|
words, "", urls, wordIndex, this.rankedCache, peer, plasmaSwitchboard.urlBlacklist,
|
|
query.ranking, query.constraint, preselectedPeerHashes);
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
private String wordsFromPeer(String peerhash, String urls) {
|
|
Map.Entry<String, TreeMap<String, String>> entry;
|
|
String word, peerlist, url, wordlist = "";
|
|
TreeMap<String, String> urlPeerlist;
|
|
int p;
|
|
boolean hasURL;
|
|
synchronized (rcAbstracts) {
|
|
Iterator<Map.Entry <String, TreeMap<String, String>>> i = rcAbstracts.entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = i.next();
|
|
word = entry.getKey();
|
|
urlPeerlist = entry.getValue();
|
|
hasURL = true;
|
|
for (int j = 0; j < urls.length(); j = j + 12) {
|
|
url = urls.substring(j, j + 12);
|
|
peerlist = (String) urlPeerlist.get(url);
|
|
p = (peerlist == null) ? -1 : peerlist.indexOf(peerhash);
|
|
if ((p < 0) || (p % 12 != 0)) {
|
|
hasURL = false;
|
|
break;
|
|
}
|
|
}
|
|
if (hasURL) wordlist += word;
|
|
}
|
|
}
|
|
return wordlist;
|
|
}
|
|
|
|
public void remove(String urlhash) {
|
|
// removes the url hash reference from last search result
|
|
/*indexRWIEntry e =*/ this.rankedCache.remove(urlhash);
|
|
//assert e != null;
|
|
}
|
|
|
|
public Set<String> references(int count) {
|
|
// returns a set of words that are computed as toplist
|
|
return this.rankedCache.getReferences(count);
|
|
}
|
|
|
|
public static class ResultEntry {
|
|
// payload objects
|
|
private indexURLEntry urlentry;
|
|
private indexURLEntry.Components urlcomps; // buffer for components
|
|
private String alternative_urlstring;
|
|
private String alternative_urlname;
|
|
private plasmaSnippetCache.TextSnippet textSnippet;
|
|
private ArrayList<plasmaSnippetCache.MediaSnippet> mediaSnippets;
|
|
|
|
// statistic objects
|
|
public long dbRetrievalTime, snippetComputationTime;
|
|
|
|
public ResultEntry(indexURLEntry urlentry, plasmaWordIndex wordIndex,
|
|
plasmaSnippetCache.TextSnippet textSnippet,
|
|
ArrayList<plasmaSnippetCache.MediaSnippet> mediaSnippets,
|
|
long dbRetrievalTime, long snippetComputationTime) {
|
|
this.urlentry = urlentry;
|
|
this.urlcomps = urlentry.comp();
|
|
this.alternative_urlstring = null;
|
|
this.alternative_urlname = null;
|
|
this.textSnippet = textSnippet;
|
|
this.mediaSnippets = mediaSnippets;
|
|
this.dbRetrievalTime = dbRetrievalTime;
|
|
this.snippetComputationTime = snippetComputationTime;
|
|
String host = urlcomps.url().getHost();
|
|
if (host.endsWith(".yacyh")) {
|
|
// translate host into current IP
|
|
int p = host.indexOf(".");
|
|
String hash = yacySeed.hexHash2b64Hash(host.substring(p + 1, host.length() - 6));
|
|
yacySeed seed = yacyCore.seedDB.getConnected(hash);
|
|
String filename = urlcomps.url().getFile();
|
|
String address = null;
|
|
if ((seed == null) || ((address = seed.getPublicAddress()) == null)) {
|
|
// seed is not known from here
|
|
try {
|
|
wordIndex.removeWordReferences(
|
|
plasmaCondenser.getWords(
|
|
("yacyshare " +
|
|
filename.replace('?', ' ') +
|
|
" " +
|
|
urlcomps.title()).getBytes(), "UTF-8").keySet(),
|
|
urlentry.hash());
|
|
wordIndex.loadedURL.remove(urlentry.hash()); // clean up
|
|
throw new RuntimeException("index void");
|
|
} catch (UnsupportedEncodingException e) {
|
|
throw new RuntimeException("parser failed: " + e.getMessage());
|
|
}
|
|
}
|
|
alternative_urlstring = "http://" + address + "/" + host.substring(0, p) + filename;
|
|
alternative_urlname = "http://share." + seed.getName() + ".yacy" + filename;
|
|
if ((p = alternative_urlname.indexOf("?")) > 0) alternative_urlname = alternative_urlname.substring(0, p);
|
|
}
|
|
}
|
|
|
|
public String hash() {
|
|
return urlentry.hash();
|
|
}
|
|
public yacyURL url() {
|
|
return urlcomps.url();
|
|
}
|
|
public kelondroBitfield flags() {
|
|
return urlentry.flags();
|
|
}
|
|
public String urlstring() {
|
|
return (alternative_urlstring == null) ? urlcomps.url().toNormalform(false, true) : alternative_urlstring;
|
|
}
|
|
public String urlname() {
|
|
return (alternative_urlname == null) ? urlcomps.url().toNormalform(false, true) : alternative_urlname;
|
|
}
|
|
public String title() {
|
|
return urlcomps.title();
|
|
}
|
|
public plasmaSnippetCache.TextSnippet textSnippet() {
|
|
return this.textSnippet;
|
|
}
|
|
public ArrayList<plasmaSnippetCache.MediaSnippet> mediaSnippets() {
|
|
return this.mediaSnippets;
|
|
}
|
|
public Date modified() {
|
|
return urlentry.moddate();
|
|
}
|
|
public int filesize() {
|
|
return urlentry.size();
|
|
}
|
|
public int limage() {
|
|
return urlentry.limage();
|
|
}
|
|
public int laudio() {
|
|
return urlentry.laudio();
|
|
}
|
|
public int lvideo() {
|
|
return urlentry.lvideo();
|
|
}
|
|
public int lapp() {
|
|
return urlentry.lapp();
|
|
}
|
|
public indexRWIEntry word() {
|
|
return urlentry.word();
|
|
}
|
|
public boolean hasTextSnippet() {
|
|
return (this.textSnippet != null) && (this.textSnippet.getErrorCode() < 11);
|
|
}
|
|
public boolean hasMediaSnippets() {
|
|
return (this.mediaSnippets != null) && (this.mediaSnippets.size() > 0);
|
|
}
|
|
public String resource() {
|
|
// generate transport resource
|
|
if ((textSnippet != null) && (textSnippet.exists())) {
|
|
return urlentry.toString(textSnippet.getLineRaw());
|
|
} else {
|
|
return urlentry.toString();
|
|
}
|
|
}
|
|
}
|
|
}
|