git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2472 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
theli
19 years ago
parent
857a2d76a2
commit
1395aae742
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package de.anomic.plasma.crawler;
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import de.anomic.plasma.plasmaHTCache;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.server.logging.serverLog;
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public final class plasmaCrawlerFactory implements org.apache.commons.pool.PoolableObjectFactory {
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private plasmaCrawlerPool thePool;
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private final ThreadGroup theThreadGroup;
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private final plasmaHTCache cacheManager;
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private final serverLog theLog;
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private final plasmaSwitchboard sb;
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public plasmaCrawlerFactory(
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ThreadGroup threadGroup,
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plasmaSwitchboard theSb,
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plasmaHTCache theCacheManager,
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serverLog log) {
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super();
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if (threadGroup == null)
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throw new IllegalArgumentException("The threadgroup object must not be null.");
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this.theThreadGroup = threadGroup;
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this.cacheManager = theCacheManager;
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this.sb = theSb;
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this.theLog = log;
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}
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public void setPool(plasmaCrawlerPool pool) {
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this.thePool = pool;
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}
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/**
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* @see org.apache.commons.pool.PoolableObjectFactory#makeObject()
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*/
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public Object makeObject() {
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return new plasmaCrawlWorker(
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this.theThreadGroup,
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this.thePool,
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this.sb,
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this.cacheManager,
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this.theLog);
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}
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/**
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* @see org.apache.commons.pool.PoolableObjectFactory#destroyObject(java.lang.Object)
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*/
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public void destroyObject(Object obj) {
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if (obj == null) return;
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if (obj instanceof plasmaCrawlWorker) {
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plasmaCrawlWorker theWorker = (plasmaCrawlWorker) obj;
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synchronized(theWorker) {
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theWorker.destroyed = true;
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theWorker.setName(plasmaCrawlWorker.threadBaseName + "_destroyed");
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theWorker.setStopped(true);
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theWorker.interrupt();
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}
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}
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}
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/**
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* @see org.apache.commons.pool.PoolableObjectFactory#validateObject(java.lang.Object)
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*/
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public boolean validateObject(Object obj) {
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return true;
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}
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/**
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* @param obj
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*
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*/
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public void activateObject(Object obj) {
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//log.debug(" activateObject...");
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}
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/**
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* @param obj
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*
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*/
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public void passivateObject(Object obj) {
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//log.debug(" passivateObject..." + obj);
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/*
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if (obj instanceof plasmaCrawlWorker) {
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plasmaCrawlWorker theWorker = (plasmaCrawlWorker) obj;
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}
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*/
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}
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}
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@ -0,0 +1,127 @@
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// plasmaCrawlerMsgQueue.java
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// -------------------------------------
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// part of YACY
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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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// This file ist contributed by Martin Thelian
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//
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// $LastChangedDate: 2006-02-20 23:57:42 +0100 (Mo, 20 Feb 2006) $
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// $LastChangedRevision: 1715 $
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// $LastChangedBy: theli $
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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.crawler;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import de.anomic.plasma.plasmaCrawlLoaderMessage;
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import de.anomic.server.serverSemaphore;
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public class plasmaCrawlerMsgQueue {
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private final serverSemaphore readSync;
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private final serverSemaphore writeSync;
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private final ArrayList messageList;
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public plasmaCrawlerMsgQueue() {
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this.readSync = new serverSemaphore (0);
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this.writeSync = new serverSemaphore (1);
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this.messageList = new ArrayList(10);
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}
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/**
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*
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* @param newMessage
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* @throws MessageQueueLockedException
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* @throws InterruptedException
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*/
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public void addMessage(plasmaCrawlLoaderMessage newMessage)
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throws InterruptedException, NullPointerException
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{
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if (newMessage == null) throw new NullPointerException();
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this.writeSync.P();
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boolean insertionDoneSuccessfully = false;
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synchronized(this.messageList) {
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insertionDoneSuccessfully = this.messageList.add(newMessage);
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}
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if (insertionDoneSuccessfully) {
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this.sortMessages();
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this.readSync.V();
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}
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this.writeSync.V();
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}
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public plasmaCrawlLoaderMessage waitForMessage() throws InterruptedException {
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this.readSync.P();
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this.writeSync.P();
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plasmaCrawlLoaderMessage newMessage = null;
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synchronized(this.messageList) {
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newMessage = (plasmaCrawlLoaderMessage) this.messageList.remove(0);
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}
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this.writeSync.V();
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return newMessage;
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}
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protected void sortMessages() {
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Collections.sort(this.messageList, new Comparator() {
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public int compare(Object o1, Object o2)
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{
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plasmaCrawlLoaderMessage message1 = (plasmaCrawlLoaderMessage) o1;
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plasmaCrawlLoaderMessage message2 = (plasmaCrawlLoaderMessage) o2;
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int message1Priority = message1.crawlingPriority;
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int message2Priority = message2.crawlingPriority;
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if (message1Priority > message2Priority){
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return -1;
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} else if (message1Priority < message2Priority) {
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return 1;
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} else {
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return 0;
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}
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}
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});
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}
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}
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@ -0,0 +1,106 @@
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package de.anomic.plasma.crawler;
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import org.apache.commons.pool.impl.GenericObjectPool;
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import de.anomic.server.logging.serverLog;
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public final class plasmaCrawlerPool extends GenericObjectPool {
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private final ThreadGroup theThreadGroup;
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public boolean isClosed = false;
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public plasmaCrawlerPool(plasmaCrawlerFactory objFactory,
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GenericObjectPool.Config config,
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ThreadGroup threadGroup) {
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super(objFactory, config);
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this.theThreadGroup = threadGroup;
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objFactory.setPool(this);
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}
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public Object borrowObject() throws Exception {
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return super.borrowObject();
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}
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public void returnObject(Object obj) {
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if (obj == null) return;
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if (obj instanceof plasmaCrawlWorker) {
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try {
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((plasmaCrawlWorker)obj).setName(plasmaCrawlWorker.threadBaseName + "_inPool");
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super.returnObject(obj);
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} catch (Exception e) {
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((plasmaCrawlWorker)obj).setStopped(true);
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serverLog.logSevere("CRAWLER-POOL","Unable to return crawler thread to pool.",e);
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}
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} else {
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serverLog.logSevere("CRAWLER-POOL","Object of wront type '" + obj.getClass().getName() +
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"' returned to pool.");
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}
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}
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public void invalidateObject(Object obj) {
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if (obj == null) return;
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if (this.isClosed) return;
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if (obj instanceof plasmaCrawlWorker) {
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try {
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((plasmaCrawlWorker)obj).setName(plasmaCrawlWorker.threadBaseName + "_invalidated");
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((plasmaCrawlWorker)obj).setStopped(true);
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super.invalidateObject(obj);
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} catch (Exception e) {
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serverLog.logSevere("CRAWLER-POOL","Unable to invalidate crawling thread.",e);
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}
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}
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}
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public synchronized void close() throws Exception {
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try {
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/*
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* shutdown all still running session threads ...
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*/
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this.isClosed = true;
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/* waiting for all threads to finish */
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int threadCount = this.theThreadGroup.activeCount();
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Thread[] threadList = new Thread[threadCount];
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threadCount = this.theThreadGroup.enumerate(threadList);
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// signaling shutdown to all still running or pooled threads ...
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serverLog.logInfo("CRAWLER","Signaling shutdown to " + threadCount + " remaining crawler threads ...");
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for ( int currentThreadIdx = 0; currentThreadIdx < threadCount; currentThreadIdx++ ) {
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((plasmaCrawlWorker)threadList[currentThreadIdx]).setStopped(true);
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}
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// giving the crawlers some time to finish shutdown
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try { Thread.sleep(500); } catch(Exception e) {}
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// sending interrupted signal to all remaining threads
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serverLog.logInfo("CRAWLER","Sending interruption signal to " + this.theThreadGroup.activeCount() + " remaining crawler threads ...");
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this.theThreadGroup.interrupt();
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// aborting all crawlers by closing all still open httpc sockets
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serverLog.logInfo("CRAWLER","Trying to abort " + this.theThreadGroup.activeCount() + " remaining crawler threads ...");
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for ( int currentThreadIdx = 0; currentThreadIdx < threadCount; currentThreadIdx++ ) {
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Thread currentThread = threadList[currentThreadIdx];
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if (currentThread.isAlive()) {
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serverLog.logInfo("CRAWLER","Trying to shutdown crawler thread '" + currentThread.getName() + "' [" + currentThreadIdx + "].");
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((plasmaCrawlWorker)currentThread).close();
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}
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}
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serverLog.logInfo("CRAWLER","Waiting for " + this.theThreadGroup.activeCount() + " remaining crawler threads to finish shutdown ...");
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for ( int currentThreadIdx = 0; currentThreadIdx < threadCount; currentThreadIdx++ ) {
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Thread currentThread = threadList[currentThreadIdx];
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if (currentThread.isAlive()) {
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serverLog.logInfo("CRAWLER","Waiting for crawler thread '" + currentThread.getName() + "' [" + currentThreadIdx + "] to finish shutdown.");
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try { currentThread.join(500); } catch (InterruptedException ex) {}
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}
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}
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serverLog.logWarning("CRAWLER","Shutdown of remaining crawler threads finish.");
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}
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catch (Exception e) {
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serverLog.logWarning("CRAWLER","Unexpected error while trying to shutdown all remaining crawler threads.",e);
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}
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super.close();
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}
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}
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