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326 lines
15 KiB
326 lines
15 KiB
// yacySearch.java
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// -------------------------------------
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notice above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.yacy;
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import java.util.ArrayList;
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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 de.anomic.index.indexReferenceBlacklist;
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import de.anomic.kelondro.kelondroBitfield;
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import de.anomic.kelondro.kelondroMScoreCluster;
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import de.anomic.plasma.plasmaCrawlResults;
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import de.anomic.plasma.plasmaSearchRankingProcess;
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import de.anomic.plasma.plasmaSearchQuery;
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import de.anomic.plasma.plasmaSearchRankingProfile;
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import de.anomic.plasma.plasmaWordIndex;
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import de.anomic.server.logging.serverLog;
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public class yacySearch extends Thread {
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final private String wordhashes, excludehashes, urlhashes;
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final private boolean global;
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final private int partitions;
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final private plasmaWordIndex wordIndex;
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final private plasmaSearchRankingProcess containerCache;
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final private Map<String, TreeMap<String, String>> abstractCache;
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final private indexReferenceBlacklist blacklist;
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final private yacySeed targetPeer;
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private String[] urls;
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private int count, maxDistance;
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final private plasmaSearchRankingProfile rankingProfile;
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final private String prefer, filter;
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final private kelondroBitfield constraint;
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plasmaCrawlResults crawlResults;
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public yacySearch(String wordhashes, String excludehashes, String urlhashes, String prefer, String filter, int count, int maxDistance,
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boolean global, int partitions, yacySeed targetPeer, plasmaWordIndex wordIndex,
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plasmaCrawlResults crawlResults,
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plasmaSearchRankingProcess containerCache,
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Map<String, TreeMap<String, String>> abstractCache,
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indexReferenceBlacklist blacklist,
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plasmaSearchRankingProfile rankingProfile,
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kelondroBitfield constraint) {
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super("yacySearch_" + targetPeer.getName());
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//System.out.println("DEBUG - yacySearch thread " + this.getName() + " initialized " + ((urlhashes.length() == 0) ? "(primary)" : "(secondary)"));
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this.wordhashes = wordhashes;
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this.excludehashes = excludehashes;
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this.urlhashes = urlhashes;
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this.prefer = prefer;
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this.filter = filter;
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this.global = global;
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this.partitions = partitions;
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this.wordIndex = wordIndex;
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this.crawlResults = crawlResults;
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this.containerCache = containerCache;
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this.abstractCache = abstractCache;
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this.blacklist = blacklist;
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this.targetPeer = targetPeer;
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this.urls = null;
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this.count = count;
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this.maxDistance = maxDistance;
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this.rankingProfile = rankingProfile;
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this.constraint = constraint;
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}
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public void run() {
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this.urls = yacyClient.search(
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wordhashes, excludehashes, urlhashes, prefer, filter, count, maxDistance, global, partitions,
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targetPeer, wordIndex, crawlResults, containerCache, abstractCache,
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blacklist, rankingProfile, constraint);
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if (urls != null) {
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// urls is an array of url hashes. this is only used for log output
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StringBuffer urllist = new StringBuffer(this.urls.length * 13);
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for (int i = 0; i < this.urls.length; i++) urllist.append(this.urls[i]).append(' ');
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yacyCore.log.logInfo("REMOTE SEARCH - remote peer " + targetPeer.hash + ":" + targetPeer.getName() + " contributed " + urls.length + " links for word hash " + wordhashes + ": " + new String(urllist));
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yacyCore.seedDB.mySeed().incRI(urls.length);
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yacyCore.seedDB.mySeed().incRU(urls.length);
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} else {
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yacyCore.log.logInfo("REMOTE SEARCH - no answer from remote peer " + targetPeer.hash + ":" + targetPeer.getName());
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}
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}
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public static String set2string(Set<String> hashes) {
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String wh = "";
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final Iterator<String> iter = hashes.iterator();
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while (iter.hasNext()) { wh = wh + (String) iter.next(); }
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return wh;
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}
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public int links() {
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return this.urls.length;
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}
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public int count() {
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return this.count;
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}
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public yacySeed target() {
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return targetPeer;
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}
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private static yacySeed[] selectClusterPeers(TreeMap<String, String> peerhashes) {
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Iterator<Map.Entry<String, String>> i = peerhashes.entrySet().iterator();
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ArrayList<yacySeed> l = new ArrayList<yacySeed>();
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Map.Entry<String, String> entry;
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yacySeed s;
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while (i.hasNext()) {
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entry = i.next();
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s = yacyCore.seedDB.get(entry.getKey()); // should be getConnected; get only during testing time
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if (s != null) {
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s.setAlternativeAddress(entry.getValue());
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l.add(s);
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}
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}
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yacySeed[] result = new yacySeed[l.size()];
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for (int j = 0; j < l.size(); j++) {
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result[j] = l.get(j);
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}
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return result;
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//return (yacySeed[]) l.toArray();
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}
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private static yacySeed[] selectSearchTargets(Set<String> wordhashes, int seedcount) {
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// find out a specific number of seeds, that would be relevant for the given word hash(es)
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// the result is ordered by relevance: [0] is most relevant
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// the seedcount is the maximum number of wanted results
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if (yacyCore.seedDB == null) { return null; }
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if ((seedcount >= yacyCore.seedDB.sizeConnected()) || (yacyCore.seedDB.noDHTActivity())) {
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seedcount = yacyCore.seedDB.sizeConnected();
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}
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// put in seeds according to dht
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final kelondroMScoreCluster<String> ranking = new kelondroMScoreCluster<String>();
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final HashMap<String, yacySeed> seeds = new HashMap<String, yacySeed>();
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yacySeed seed;
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Iterator<yacySeed> dhtEnum;
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int c;
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String wordhash;
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double distance;
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Iterator<String> iter = wordhashes.iterator();
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while (iter.hasNext()) {
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wordhash = iter.next();
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dhtEnum = yacyCore.dhtAgent.getDHTSeeds(true, wordhash, (float) 0.0);
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c = seedcount;
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while (dhtEnum.hasNext() && c > 0) {
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seed = (yacySeed) dhtEnum.next();
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if (seed == null) continue;
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distance = yacyDHTAction.dhtDistance(seed.hash, wordhash);
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if (distance > 0.2) continue; // catch bug in peer selection
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if (!seed.getFlagAcceptRemoteIndex()) continue; // probably a robinson peer
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serverLog.logFine("PLASMA", "selectPeers/DHTorder: " + seed.hash + ":" + seed.getName() + "/" + distance + " for wordhash " + wordhash + ", score " + c);
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ranking.addScore(seed.hash, c--);
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seeds.put(seed.hash, seed);
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}
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}
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// put in seeds according to size of peer
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dhtEnum = yacyCore.seedDB.seedsSortedConnected(false, yacySeed.ICOUNT);
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c = seedcount;
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int score;
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if (c > yacyCore.seedDB.sizeConnected()) { c = yacyCore.seedDB.sizeConnected(); }
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while (dhtEnum.hasNext() && c > 0) {
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seed = dhtEnum.next();
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if (seed == null) continue;
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if (!seed.getFlagAcceptRemoteIndex()) continue; // probably a robinson peer
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score = (int) Math.round(Math.random() * ((c / 3) + 3));
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serverLog.logFine("PLASMA", "selectPeers/RWIcount: " + seed.hash + ":" + seed.getName() + ", RWIcount=" + seed.get(yacySeed.ICOUNT,"") + ", score " + score);
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ranking.addScore(seed.hash, score);
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seeds.put(seed.hash, seed);
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c--;
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}
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// put in seeds that are public robinson peers and where the peer tags match with query
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// or seeds that are newbies to ensure that public demonstrations always work
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dhtEnum = yacyCore.seedDB.seedsConnected(true, false, null, (float) 0.50);
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while (dhtEnum.hasNext()) {
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seed = dhtEnum.next();
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if (seed == null) continue;
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if (seed.matchPeerTags(wordhashes)) { // access robinson peers with matching tag
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serverLog.logInfo("PLASMA", "selectPeers/PeerTags: " + seed.hash + ":" + seed.getName() + ", is specialized peer for " + seed.getPeerTags().toString());
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ranking.addScore(seed.hash, seedcount);
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seeds.put(seed.hash, seed);
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}
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if (seed.getAge() < 1) { // the 'workshop feature'
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serverLog.logInfo("PLASMA", "selectPeers/Age: " + seed.hash + ":" + seed.getName() + ", is newbie, age = " + seed.getAge());
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ranking.addScore(seed.hash, seedcount);
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seeds.put(seed.hash, seed);
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}
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}
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// evaluate the ranking score and select seeds
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if (ranking.size() < seedcount) { seedcount = ranking.size(); }
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yacySeed[] result = new yacySeed[seedcount];
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c = 0;
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iter = ranking.scores(false); // higher are better
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while (iter.hasNext() && c < result.length) {
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seed = (yacySeed) seeds.get((String) iter.next());
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seed.selectscore = c;
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serverLog.logFine("PLASMA", "selectPeers/_lineup_: " + seed.hash + ":" + seed.getName() + " is choice " + c);
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result[c++] = seed;
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}
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// System.out.println("DEBUG yacySearch.selectPeers = " + seedcount + " seeds:"); for (int i = 0; i < seedcount; i++) System.out.println(" #" + i + ":" + result[i]); // debug
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return result;
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}
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public static yacySearch[] primaryRemoteSearches(
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String wordhashes, String excludehashes, String urlhashes,
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String prefer, String filter, int count, int maxDist,
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plasmaWordIndex wordIndex,
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plasmaCrawlResults crawlResults,
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plasmaSearchRankingProcess containerCache,
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Map<String, TreeMap<String, String>> abstractCache,
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int targets,
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indexReferenceBlacklist blacklist,
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plasmaSearchRankingProfile rankingProfile,
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kelondroBitfield constraint,
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TreeMap<String, String> clusterselection) {
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// check own peer status
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if (yacyCore.seedDB.mySeed() == null || yacyCore.seedDB.mySeed().getPublicAddress() == null) { return null; }
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// prepare seed targets and threads
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final yacySeed[] targetPeers = (clusterselection == null) ? selectSearchTargets(plasmaSearchQuery.hashes2Set(wordhashes), targets) : selectClusterPeers(clusterselection);
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if (targetPeers == null) return new yacySearch[0];
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targets = targetPeers.length;
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if (targets == 0) return new yacySearch[0];
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yacySearch[] searchThreads = new yacySearch[targets];
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for (int i = 0; i < targets; i++) {
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searchThreads[i] = new yacySearch(wordhashes, excludehashes, urlhashes, prefer, filter, count, maxDist, true, targets, targetPeers[i],
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wordIndex, crawlResults, containerCache, abstractCache, blacklist, rankingProfile, constraint);
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searchThreads[i].start();
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//try {Thread.sleep(20);} catch (InterruptedException e) {}
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}
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return searchThreads;
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}
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public static yacySearch secondaryRemoteSearch(String wordhashes, String excludehashes, String urlhashes,
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plasmaWordIndex wordIndex,
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plasmaCrawlResults crawlResults,
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plasmaSearchRankingProcess containerCache,
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String targethash, indexReferenceBlacklist blacklist,
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plasmaSearchRankingProfile rankingProfile,
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kelondroBitfield constraint, TreeMap<String, String> clusterselection) {
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// check own peer status
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if (yacyCore.seedDB.mySeed() == null || yacyCore.seedDB.mySeed().getPublicAddress() == null) { return null; }
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// prepare seed targets and threads
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final yacySeed targetPeer = yacyCore.seedDB.getConnected(targethash);
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if (targetPeer == null) return null;
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if (clusterselection != null) targetPeer.setAlternativeAddress((String) clusterselection.get(targetPeer.hash));
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yacySearch searchThread = new yacySearch(wordhashes, excludehashes, urlhashes, "", "", 0, 9999, true, 0, targetPeer,
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wordIndex, crawlResults, containerCache, new TreeMap<String, TreeMap<String, String>>(), blacklist, rankingProfile, constraint);
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searchThread.start();
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return searchThread;
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}
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public static int remainingWaiting(yacySearch[] searchThreads) {
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if (searchThreads == null) return 0;
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int alive = 0;
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for (int i = 0; i < searchThreads.length; i++) {
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if (searchThreads == null) break; // may occur
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if (searchThreads[i].isAlive()) alive++;
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}
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return alive;
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}
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public static int collectedLinks(yacySearch[] searchThreads) {
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int links = 0;
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for (int i = 0; i < searchThreads.length; i++) {
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if (!(searchThreads[i].isAlive())) links += searchThreads[i].urls.length;
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}
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return links;
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}
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public static void interruptAlive(yacySearch[] searchThreads) {
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for (int i = 0; i < searchThreads.length; i++) {
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if (searchThreads[i].isAlive()) searchThreads[i].interrupt();
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}
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}
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}
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