this is needed to merge the dht selection with the indexing thread git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1718 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
19 years ago
parent
134253a603
commit
a840755964
@ -1,244 +0,0 @@
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//plasmaWordIndexDistribution.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, 2005
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import de.anomic.yacy.yacyCore;
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import de.anomic.yacy.yacySeed;
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import de.anomic.server.logging.serverLog;
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public final class plasmaWordIndexDistribution {
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// distributes parts of the index to other peers
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// stops as soon as an error occurrs
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private int indexCount;
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private int juniorPeerCount, seniorPeerCount;
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private long maxTime;
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private final plasmaURLPool urlPool;
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private final plasmaWordIndex wordIndex;
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final serverLog log;
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boolean paused = false;
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private boolean enabled;
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private boolean enabledWhileCrawling;
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private boolean closed;
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private boolean gzipBody4Distribution;
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private int timeout4Distribution;
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public plasmaWordIndexDistribution(
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plasmaURLPool urlPool,
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plasmaWordIndex wordIndex,
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serverLog log,
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boolean enable,
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boolean enabledWhileCrawling,
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boolean gzipBody,
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int timeout
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) {
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this.urlPool = urlPool;
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this.wordIndex = wordIndex;
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this.enabled = enable;
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this.enabledWhileCrawling = enabledWhileCrawling;
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this.log = log;
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this.closed = false;
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setCounts(100 /*indexCount*/, 1 /*juniorPeerCount*/, 3 /*seniorPeerCount*/, 8000);
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this.gzipBody4Distribution = gzipBody;
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this.timeout4Distribution = timeout;
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}
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public void enable() {
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enabled = true;
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}
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public void disable() {
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enabled = false;
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}
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public void enableWhileCrawling() {
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this.enabledWhileCrawling = true;
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}
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public void disableWhileCrawling() {
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this.enabledWhileCrawling = false;
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}
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public void close() {
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closed = true;
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}
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private boolean isClosed() {
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return (this.closed || Thread.currentThread().isInterrupted());
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}
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public boolean job() {
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if (this.closed) {
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log.logFine("no DHT distribution: closed");
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return false;
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}
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if (yacyCore.seedDB == null) {
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log.logFine("no DHT distribution: seedDB == null");
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return false;
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}
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if (yacyCore.seedDB.mySeed == null) {
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log.logFine("no DHT distribution: mySeed == null");
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return false;
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}
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if (yacyCore.seedDB.mySeed.isVirgin()) {
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log.logFine("no DHT distribution: status is virgin");
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return false;
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}
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if (!(enabled)) {
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log.logFine("no DHT distribution: not enabled");
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return false;
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}
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if (paused) {
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log.logFine("no DHT distribution: paused");
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return false;
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}
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if (urlPool.loadedURL.size() < 10) {
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log.logFine("no DHT distribution: loadedURL.size() = " + urlPool.loadedURL.size());
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return false;
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}
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if (wordIndex.size() < 100) {
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log.logFine("no DHT distribution: not enough words - wordIndex.size() = " + wordIndex.size());
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return false;
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}
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if ((!enabledWhileCrawling) && (urlPool.noticeURL.stackSize() > 0)) {
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log.logFine("no DHT distribution: crawl in progress - noticeURL.stackSize() = " + urlPool.noticeURL.stackSize());
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return false;
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}
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// do the transfer
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int peerCount = (yacyCore.seedDB.mySeed.isJunior()) ? juniorPeerCount : seniorPeerCount;
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long starttime = System.currentTimeMillis();
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int transferred = performTransferIndex(indexCount, peerCount, true);
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if (transferred <= 0) {
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log.logFine("no word distribution: transfer failed");
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return false;
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}
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// adopt transfer count
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if ((System.currentTimeMillis() - starttime) > (maxTime * peerCount))
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indexCount--;
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else
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indexCount++;
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if (indexCount < 50) indexCount = 50;
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// show success
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return true;
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}
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public void setCounts(int indexCount, int juniorPeerCount, int seniorPeerCount, long maxTimePerTransfer) {
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this.maxTime = maxTimePerTransfer;
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this.indexCount = indexCount;
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if (indexCount < 30) indexCount = 30;
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this.juniorPeerCount = juniorPeerCount;
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this.seniorPeerCount = seniorPeerCount;
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}
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public int performTransferIndex(int indexCount, int peerCount, boolean delete) {
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if ((yacyCore.seedDB == null) || (yacyCore.seedDB.sizeConnected() == 0)) return -1;
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// collect index
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plasmaDHTChunk dhtChunk = new plasmaDHTChunk(this.log, this.wordIndex, this.urlPool.loadedURL, 30, indexCount);
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try {
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// find a list of DHT-peers
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yacySeed[] seeds = yacyCore.dhtAgent.getDHTTargets(log, peerCount, 10, dhtChunk.firstContainer().wordHash(), dhtChunk.lastContainer().wordHash(), 0.4);
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if (seeds.length < peerCount) {
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log.logWarning("found not enough (" + seeds.length + ") peers for distribution");
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return -1;
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}
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// send away the indexes to all these peers
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String peerNames = "";
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int hc1 = 0;
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plasmaDHTTransfer transfer = null;
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for (int i = 0; i < seeds.length; i++) {
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if (this.isClosed()) {
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this.log.logSevere("Index distribution interrupted by close, nothing deleted locally.");
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return -1; // interrupted
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}
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transfer = new plasmaDHTTransfer(log, seeds[i], dhtChunk, this.gzipBody4Distribution, this.timeout4Distribution, 0);
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try {transfer.uploadIndex();} catch (InterruptedException e) {}
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if (transfer.dhtChunk.getStatus() == plasmaDHTChunk.chunkStatus_COMPLETE) {
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peerNames += ", " + seeds[i].getName();
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hc1++;
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}
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if (hc1 >= peerCount) break;
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}
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if (peerNames.length() > 0) peerNames = peerNames.substring(2); // remove comma
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// clean up and finish with deletion of indexes
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if (hc1 >= peerCount) {
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// success
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if (delete) {
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int deletedURLs = dhtChunk.deleteTransferIndexes();
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this.log.logFine("Deleted from " + dhtChunk.containers().length + " transferred RWIs locally, removed " + deletedURLs + " URL references");
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return indexCount;
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}
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return indexCount;
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}
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this.log.logSevere("Index distribution failed. Too few peers (" + hc1 + ") received the index, not deleted locally.");
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return -1;
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} finally {
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if (dhtChunk.containers() != null) {
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// simply close the indexEntities
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closeTransferIndexes(dhtChunk.containers());
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}
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}
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}
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void closeTransferIndexes(plasmaWordIndexEntryContainer[] indexContainers) {
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for (int i = 0; i < indexContainers.length; i++) {
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indexContainers[i] = null;
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}
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}
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}
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