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269 lines
13 KiB
269 lines
13 KiB
// plasmaDHTFlush.java
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// ------------------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005, 2006
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//
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// This Class was written by Martin Thelian
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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 de.anomic.kelondro.kelondroBase64Order;
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import de.anomic.kelondro.kelondroDigest;
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import de.anomic.server.logging.serverLog;
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import de.anomic.yacy.yacySeed;
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import de.anomic.yacy.yacySeedDB;
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public class plasmaDHTFlush extends Thread {
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private yacySeed seed = null;
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private boolean delete = false;
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private boolean finished = false;
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private boolean gzipBody4Transfer = false;
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private int timeout4Transfer = 60000;
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private int transferedEntryCount = 0;
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private long transferedBytes = 0;
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private int transferedContainerCount = 0;
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private String status = "Running";
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private String oldStartingPointHash = "AAAAAAAAAAAA", startPointHash = "AAAAAAAAAAAA";
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private int initialWordsDBSize = 0;
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private int chunkSize = 500;
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private final long startingTime = System.currentTimeMillis();
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private final plasmaSwitchboard sb;
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private plasmaDHTTransfer worker = null;
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private final serverLog log;
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private final plasmaWordIndex wordIndex;
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public plasmaDHTFlush(final serverLog log, final plasmaWordIndex wordIndex, final yacySeed seed, final boolean delete, final boolean gzipBody, final int timeout) {
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super(new ThreadGroup("TransferIndexThreadGroup"),"TransferIndex_" + seed.getName());
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this.log = log;
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this.wordIndex = wordIndex;
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this.seed = seed;
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this.delete = delete;
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this.sb = plasmaSwitchboard.getSwitchboard();
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this.initialWordsDBSize = this.sb.webIndex.size();
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this.gzipBody4Transfer = gzipBody;
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this.timeout4Transfer = timeout;
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//this.maxOpenFiles4Transfer = (int) sb.getConfigLong("indexTransfer.maxOpenFiles",800);
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}
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public void run() {
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this.performTransferWholeIndex();
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}
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public void stopIt(final boolean wait) throws InterruptedException {
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this.finished = true;
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if (this.worker != null) this.worker.stopIt();
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if (wait) this.join();
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}
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public boolean isFinished() {
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return this.finished;
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}
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public boolean deleteIndex() {
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return this.delete;
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}
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public int[] getIndexCount() {
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final plasmaDHTTransfer workerThread = this.worker;
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if (workerThread != null) {
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return new int[]{this.chunkSize, workerThread.dhtChunk.indexCount()};
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}
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return new int[]{this.chunkSize, 500};
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}
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public int getTransferedEntryCount() {
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return this.transferedEntryCount;
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}
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public int getTransferedContainerCount() {
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return this.transferedContainerCount;
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}
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public long getTransferedBytes() {
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return this.transferedBytes;
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}
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public float getTransferedContainerPercent() {
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final long currentWordsDBSize = this.sb.webIndex.size();
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if (this.initialWordsDBSize == 0) return 100;
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else if (currentWordsDBSize >= this.initialWordsDBSize) return 0;
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//else return (float) ((initialWordsDBSize-currentWordsDBSize)/(initialWordsDBSize/100));
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else return (this.transferedContainerCount*100f/this.initialWordsDBSize);
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}
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public int getTransferedEntrySpeed() {
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long transferTime = System.currentTimeMillis() - this.startingTime;
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if (transferTime <= 0) transferTime = 1;
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return (int) ((1000L * this.transferedEntryCount) / transferTime);
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}
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public yacySeed getSeed() {
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return this.seed;
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}
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public String[] getStatus() {
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final plasmaDHTTransfer workerThread = this.worker;
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if (workerThread != null) {
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return new String[]{this.status,workerThread.getStatusMessage()};
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}
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return new String[]{this.status,"Not running"};
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}
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public String[] getRange() {
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final plasmaDHTTransfer workerThread = this.worker;
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if (workerThread != null) {
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return new String[]{"[" + this.oldStartingPointHash + ".." + this.startPointHash + "]",
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"[" + workerThread.dhtChunk.firstContainer().getWordHash() + ".." + workerThread.dhtChunk.lastContainer().getWordHash() + "]"};
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}
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return new String[]{"[" + this.oldStartingPointHash + ".." + this.startPointHash + "]","[------------..------------]"};
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}
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public void performTransferWholeIndex() {
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plasmaDHTChunk newDHTChunk = null, oldDHTChunk = null;
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try {
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// initial startingpoint of intex transfer is "AAAAAAAAAAAA"
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if (this.log.isFine()) this.log.logFine("Selected hash " + this.startPointHash + " as start point for index distribution of whole index");
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/* Loop until we have
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* - finished transfer of whole index
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* - detected a server shutdown or user interruption
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* - detected a failure
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*/
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long iteration = 0;
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while (!this.finished && !Thread.currentThread().isInterrupted()) {
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iteration++;
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oldDHTChunk = newDHTChunk;
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// selecting 500 words to transfer
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this.status = "Running: Selecting chunk " + iteration;
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newDHTChunk = new plasmaDHTChunk(this.log, this.wordIndex, this.chunkSize/3*2, this.chunkSize, -1, this.startPointHash);
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/* If we havn't selected a word chunk this could be because of
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* a) no words are left in the index
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* b) max open file limit was exceeded
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*/
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if (nothingSelected(newDHTChunk)) {
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if (this.sb.webIndex.size() > 0 && this.delete) {
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// if there are still words in the index we try it again now
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if((iteration % 10L) == 0) { // seems to be blocked, try another startpoint
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this.startPointHash = kelondroBase64Order.enhancedCoder.encode(kelondroDigest.encodeMD5Raw(Long.toString(System.currentTimeMillis()))).substring(2, 2 + yacySeedDB.commonHashLength);
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} else {
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this.startPointHash = "AAAAAAAAAAAA";
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}
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} else {
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// otherwise we could end transfer now
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if (this.log.isFine()) this.log.logFine("No index available for index transfer, hash start-point " + this.startPointHash);
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this.status = "Finished. " + iteration + " chunks transfered.";
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this.finished = true;
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}
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} else {
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// getting start point for next DHT-selection
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this.oldStartingPointHash = this.startPointHash;
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this.startPointHash = newDHTChunk.lastContainer().getWordHash(); // DHT targets must have greater hashes
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this.log.logInfo("Index selection of " + newDHTChunk.indexCount() + " words [" + newDHTChunk.firstContainer().getWordHash() + " .. " + newDHTChunk.lastContainer().getWordHash() + "]" +
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" in " +
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(newDHTChunk.getSelectionTime() / 1000) + " seconds (" +
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(1000 * newDHTChunk.indexCount() / (newDHTChunk.getSelectionTime()+1)) + " words/s)");
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}
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// query status of old worker thread
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if (this.worker != null) {
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this.status = "Finished: Selecting chunk " + iteration;
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this.worker.join();
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if (this.worker.getStatus() != plasmaDHTChunk.chunkStatus_COMPLETE) {
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// if the transfer failed we abort index transfer now
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this.status = "Aborted because of Transfer error:\n" + this.worker.dhtChunk.getStatus();
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// abort index transfer
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return;
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}
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// calculationg the new transfer size
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this.calculateNewChunkSize();
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// counting transfered containers / entries
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this.transferedEntryCount += oldDHTChunk.indexCount();
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this.transferedContainerCount += oldDHTChunk.containerSize();
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this.transferedBytes += this.worker.getPayloadSize();
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this.worker = null;
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// deleting transfered words from index
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if (this.delete) {
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this.status = "Running: Deleting chunk " + iteration;
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final String urlReferences = oldDHTChunk.deleteTransferIndexes();
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if (this.log.isFine()) this.log.logFine("Deleted from " + oldDHTChunk.containerSize() + " transferred RWIs locally " + urlReferences + " URL references");
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}
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oldDHTChunk = null;
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}
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// handover chunk to transfer worker
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if ((newDHTChunk.containerSize() > 0) || (newDHTChunk.getStatus() == plasmaDHTChunk.chunkStatus_FILLED)) {
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this.worker = new plasmaDHTTransfer(this.log, this.wordIndex.seedDB, this.wordIndex.peerActions, this.seed, newDHTChunk, this.gzipBody4Transfer, this.timeout4Transfer, 5);
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this.worker.setTransferMode(plasmaDHTTransfer.TRANSFER_MODE_FLUSH);
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this.worker.start();
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}
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}
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// if we reach this point we were aborted by the user or by server shutdown
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if (this.sb.webIndex.size() > 0) this.status = "aborted";
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} catch (final Exception e) {
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this.status = "Error: " + e.getMessage();
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this.log.logWarning("Index transfer to peer " + this.seed.getName() + ":" + this.seed.hash + " failed:'" + e.getMessage() + "'",e);
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} finally {
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if (this.worker != null) {
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this.worker.stopIt();
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try {this.worker.join();}catch(final Exception e){}
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}
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}
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}
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private void calculateNewChunkSize() {
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// getting the transfered chunk size
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this.chunkSize = this.worker.dhtChunk.indexCount();
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// getting the chunk selection time
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final long selectionTime = this.worker.dhtChunk.getSelectionTime();
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// getting the chunk transfer time
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final long transferTime = this.worker.getTransferTime();
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// calculationg the new chunk size
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if (transferTime > 60*1000 && this.chunkSize>200) {
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this.chunkSize-=100;
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} else if (selectionTime < transferTime){
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this.chunkSize +=100;
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} else if (selectionTime >= transferTime && this.chunkSize>200){
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this.chunkSize-=100;
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} else if (this.chunkSize <= 3){
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this.chunkSize = 500;
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}
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}
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private static boolean nothingSelected(final plasmaDHTChunk newDHTChunk) {
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return (newDHTChunk == null) ||
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(newDHTChunk.containerSize() == 0) ||
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(newDHTChunk.getStatus() == plasmaDHTChunk.chunkStatus_FAILED);
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}
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}
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