You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
447 lines
15 KiB
447 lines
15 KiB
// plasmaCrawlerLoader.java
|
|
// ------------------------
|
|
// part of YaCy
|
|
// (C) by Michael Peter Christen; mc@anomic.de
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2004
|
|
// last major change: 25.02.2004
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
//
|
|
// Using this software in any meaning (reading, learning, copying, compiling,
|
|
// running) means that you agree that the Author(s) is (are) not responsible
|
|
// for cost, loss of data or any harm that may be caused directly or indirectly
|
|
// by usage of this softare or this documentation. The usage of this software
|
|
// is on your own risk. The installation and usage (starting/running) of this
|
|
// software may allow other people or application to access your computer and
|
|
// any attached devices and is highly dependent on the configuration of the
|
|
// software which must be done by the user of the software; the author(s) is
|
|
// (are) also not responsible for proper configuration and usage of the
|
|
// software, even if provoked by documentation provided together with
|
|
// the software.
|
|
//
|
|
// Any changes to this file according to the GPL as documented in the file
|
|
// gpl.txt aside this file in the shipment you received can be done to the
|
|
// lines that follows this copyright notice here, but changes must not be
|
|
// done inside the copyright notive above. A re-distribution must contain
|
|
// the intact and unchanged copyright notice.
|
|
// Contributions and changes to the program code must be marked as such.
|
|
|
|
package de.anomic.plasma;
|
|
|
|
import java.net.URL;
|
|
import java.util.ArrayList;
|
|
import java.util.Collections;
|
|
import java.util.Comparator;
|
|
import java.util.HashSet;
|
|
import java.util.Hashtable;
|
|
|
|
import org.apache.commons.pool.impl.GenericObjectPool;
|
|
|
|
import de.anomic.server.serverSemaphore;
|
|
import de.anomic.server.logging.serverLog;
|
|
|
|
public final class plasmaCrawlLoader extends Thread {
|
|
|
|
private final plasmaHTCache cacheManager;
|
|
private final int socketTimeout;
|
|
private final int loadTimeout;
|
|
private final int maxSlots;
|
|
private final serverLog log;
|
|
|
|
private final CrawlerMessageQueue theQueue;
|
|
private final CrawlerPool crawlwerPool;
|
|
private GenericObjectPool.Config cralwerPoolConfig = null;
|
|
private final ThreadGroup theThreadGroup = new ThreadGroup("CrawlerThreads");
|
|
private boolean stopped = false;
|
|
|
|
public plasmaCrawlLoader(
|
|
plasmaHTCache cacheManager,
|
|
serverLog log,
|
|
int socketTimeout,
|
|
int loadTimeout,
|
|
int mslots,
|
|
boolean proxyUse,
|
|
String proxyHost,
|
|
int proxyPort) {
|
|
this.setName("plasmaCrawlLoader");
|
|
|
|
this.cacheManager = cacheManager;
|
|
this.log = log;
|
|
this.socketTimeout = socketTimeout;
|
|
this.loadTimeout = loadTimeout;
|
|
this.maxSlots = mslots;
|
|
|
|
// configuring the crawler messagequeue
|
|
this.theQueue = new CrawlerMessageQueue();
|
|
|
|
// configuring the crawler thread pool
|
|
// implementation of session thread pool
|
|
this.cralwerPoolConfig = new GenericObjectPool.Config();
|
|
|
|
// The maximum number of active connections that can be allocated from pool at the same time,
|
|
// 0 for no limit
|
|
this.cralwerPoolConfig.maxActive = this.maxSlots;
|
|
|
|
// The maximum number of idle connections connections in the pool
|
|
// 0 = no limit.
|
|
this.cralwerPoolConfig.maxIdle = this.maxSlots / 2;
|
|
this.cralwerPoolConfig.minIdle = this.maxSlots / 4;
|
|
|
|
// block undefinitely
|
|
this.cralwerPoolConfig.maxWait = -1;
|
|
|
|
// Action to take in case of an exhausted DBCP statement pool
|
|
// 0 = fail, 1 = block, 2= grow
|
|
this.cralwerPoolConfig.whenExhaustedAction = GenericObjectPool.WHEN_EXHAUSTED_BLOCK;
|
|
this.cralwerPoolConfig.minEvictableIdleTimeMillis = 30000;
|
|
// config.testOnReturn = true;
|
|
|
|
CrawlerFactory theFactory = new CrawlerFactory(
|
|
this.theThreadGroup,
|
|
cacheManager,
|
|
socketTimeout,
|
|
proxyUse,
|
|
proxyHost,
|
|
proxyPort,
|
|
log);
|
|
|
|
this.crawlwerPool = new CrawlerPool(theFactory,this.cralwerPoolConfig,this.theThreadGroup);
|
|
|
|
// start the crawl loader
|
|
this.start();
|
|
}
|
|
|
|
public GenericObjectPool.Config getPoolConfig() {
|
|
return this.cralwerPoolConfig;
|
|
}
|
|
|
|
public void setPoolConfig(GenericObjectPool.Config newConfig) {
|
|
this.crawlwerPool.setConfig(newConfig);
|
|
}
|
|
|
|
public void close() {
|
|
try {
|
|
// setting the stop flag to true
|
|
this.stopped = true;
|
|
|
|
// interrupting the plasmaCrawlLoader
|
|
this.interrupt();
|
|
|
|
// waiting for the thread to finish ...
|
|
this.log.logInfo("Waiting for plasmaCrawlLoader shutdown ...");
|
|
this.join(5000);
|
|
} catch (Exception e) {
|
|
// we where interrupted while waiting for the crawlLoader Thread to finish
|
|
}
|
|
}
|
|
|
|
public ThreadGroup threadStatus() {
|
|
return this.theThreadGroup;
|
|
}
|
|
|
|
public void run() {
|
|
|
|
while (!this.stopped && !Thread.interrupted()) {
|
|
try {
|
|
// getting a new message from the crawler queue
|
|
plasmaCrawlLoaderMessage theMsg = this.theQueue.waitForMessage();
|
|
|
|
// getting a new crawler from the crawler pool
|
|
plasmaCrawlWorker theWorker = (plasmaCrawlWorker) this.crawlwerPool.borrowObject();
|
|
theWorker.execute(theMsg);
|
|
|
|
} catch (InterruptedException e) {
|
|
Thread.interrupted();
|
|
this.stopped = true;
|
|
}
|
|
catch (Exception e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
// consuming the is interrupted flag
|
|
this.isInterrupted();
|
|
|
|
// closing the pool
|
|
try {
|
|
this.crawlwerPool.close();
|
|
}
|
|
catch (Exception e) {
|
|
// TODO Auto-generated catch block
|
|
e.printStackTrace();
|
|
}
|
|
|
|
}
|
|
|
|
public void loadParallel(
|
|
URL url,
|
|
String referer,
|
|
String initiator,
|
|
int depth,
|
|
plasmaCrawlProfile.entry profile) {
|
|
|
|
if (!this.crawlwerPool.isClosed) {
|
|
int crawlingPriority = 5;
|
|
|
|
// creating a new crawler queue object
|
|
plasmaCrawlLoaderMessage theMsg = new plasmaCrawlLoaderMessage(url, referer,initiator,depth,profile, crawlingPriority);
|
|
|
|
// adding the message to the queue
|
|
try {
|
|
this.theQueue.addMessage(theMsg);
|
|
} catch (InterruptedException e) {
|
|
// TODO Auto-generated catch block
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
|
|
public int size() {
|
|
return crawlwerPool.getNumActive();
|
|
}
|
|
}
|
|
|
|
|
|
class CrawlerMessageQueue {
|
|
private final serverSemaphore readSync;
|
|
private final serverSemaphore writeSync;
|
|
private final ArrayList messageList;
|
|
|
|
public CrawlerMessageQueue() {
|
|
this.readSync = new serverSemaphore (0);
|
|
this.writeSync = new serverSemaphore (1);
|
|
|
|
this.messageList = new ArrayList(10);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param newMessage
|
|
* @throws MessageQueueLockedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public void addMessage(plasmaCrawlLoaderMessage newMessage)
|
|
throws InterruptedException, NullPointerException
|
|
{
|
|
if (newMessage == null) throw new NullPointerException();
|
|
|
|
this.writeSync.P();
|
|
|
|
boolean insertionDoneSuccessfully = false;
|
|
synchronized(this.messageList) {
|
|
insertionDoneSuccessfully = this.messageList.add(newMessage);
|
|
}
|
|
|
|
if (insertionDoneSuccessfully) {
|
|
this.sortMessages();
|
|
this.readSync.V();
|
|
}
|
|
|
|
this.writeSync.V();
|
|
}
|
|
|
|
public plasmaCrawlLoaderMessage waitForMessage() throws InterruptedException {
|
|
this.readSync.P();
|
|
this.writeSync.P();
|
|
|
|
plasmaCrawlLoaderMessage newMessage = null;
|
|
synchronized(this.messageList) {
|
|
newMessage = (plasmaCrawlLoaderMessage) this.messageList.remove(0);
|
|
}
|
|
|
|
this.writeSync.V();
|
|
return newMessage;
|
|
}
|
|
|
|
protected void sortMessages() {
|
|
Collections.sort(this.messageList, new Comparator() {
|
|
public int compare(Object o1, Object o2)
|
|
{
|
|
plasmaCrawlLoaderMessage message1 = (plasmaCrawlLoaderMessage) o1;
|
|
plasmaCrawlLoaderMessage message2 = (plasmaCrawlLoaderMessage) o2;
|
|
|
|
int message1Priority = message1.crawlingPriority;
|
|
int message2Priority = message2.crawlingPriority;
|
|
|
|
if (message1Priority > message2Priority){
|
|
return -1;
|
|
} else if (message1Priority < message2Priority) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
|
|
final class CrawlerPool extends GenericObjectPool
|
|
{
|
|
private final ThreadGroup theThreadGroup;
|
|
public boolean isClosed = false;
|
|
|
|
|
|
public CrawlerPool(CrawlerFactory objFactory,
|
|
GenericObjectPool.Config config,
|
|
ThreadGroup threadGroup) {
|
|
super(objFactory, config);
|
|
this.theThreadGroup = threadGroup;
|
|
objFactory.setPool(this);
|
|
}
|
|
|
|
public Object borrowObject() throws Exception {
|
|
return super.borrowObject();
|
|
}
|
|
|
|
public void returnObject(Object obj) throws Exception {
|
|
super.returnObject(obj);
|
|
}
|
|
|
|
public synchronized void close() throws Exception {
|
|
/*
|
|
* shutdown all still running session threads ...
|
|
*/
|
|
// interrupting all still running or pooled threads ...
|
|
this.theThreadGroup.interrupt();
|
|
|
|
/* waiting for all threads to finish */
|
|
int threadCount = this.theThreadGroup.activeCount();
|
|
Thread[] threadList = new Thread[threadCount];
|
|
threadCount = this.theThreadGroup.enumerate(threadList);
|
|
|
|
try {
|
|
for ( int currentThreadIdx = 0; currentThreadIdx < threadCount; currentThreadIdx++ ) {
|
|
((plasmaCrawlWorker)threadList[currentThreadIdx]).setStopped(true);
|
|
}
|
|
|
|
for ( int currentThreadIdx = 0; currentThreadIdx < threadCount; currentThreadIdx++ ) {
|
|
// we need to use a timeout here because of missing interruptable session threads ...
|
|
if (threadList[currentThreadIdx].isAlive()) threadList[currentThreadIdx].join(500);
|
|
}
|
|
}
|
|
catch (InterruptedException e) {
|
|
System.err.println("Interruption while trying to shutdown all crawler threads.");
|
|
}
|
|
|
|
this.isClosed = true;
|
|
super.close();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
final class CrawlerFactory implements org.apache.commons.pool.PoolableObjectFactory {
|
|
|
|
private CrawlerPool thePool;
|
|
private final ThreadGroup theThreadGroup;
|
|
private final plasmaHTCache cacheManager;
|
|
private final int socketTimeout;
|
|
private final boolean remoteProxyUse;
|
|
private final String remoteProxyHost;
|
|
private final int remoteProxyPort;
|
|
private final serverLog theLog;
|
|
|
|
public CrawlerFactory(
|
|
ThreadGroup theThreadGroup,
|
|
plasmaHTCache cacheManager,
|
|
int socketTimeout,
|
|
boolean remoteProxyUse,
|
|
String remoteProxyHost,
|
|
int remoteProxyPort,
|
|
serverLog theLog) {
|
|
|
|
super();
|
|
|
|
if (theThreadGroup == null)
|
|
throw new IllegalArgumentException("The threadgroup object must not be null.");
|
|
|
|
this.theThreadGroup = theThreadGroup;
|
|
this.cacheManager = cacheManager;
|
|
this.socketTimeout = socketTimeout;
|
|
this.remoteProxyUse = remoteProxyUse;
|
|
this.remoteProxyHost = remoteProxyHost;
|
|
this.remoteProxyPort = remoteProxyPort;
|
|
this.theLog = theLog;
|
|
}
|
|
|
|
public void setPool(CrawlerPool thePool) {
|
|
this.thePool = thePool;
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#makeObject()
|
|
*/
|
|
public Object makeObject() {
|
|
return new plasmaCrawlWorker(
|
|
this.theThreadGroup,
|
|
this.thePool,
|
|
this.cacheManager,
|
|
this.socketTimeout,
|
|
this.remoteProxyUse,
|
|
this.remoteProxyHost,
|
|
this.remoteProxyPort,
|
|
this.theLog);
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#destroyObject(java.lang.Object)
|
|
*/
|
|
public void destroyObject(Object obj) {
|
|
if (obj instanceof plasmaCrawlWorker) {
|
|
plasmaCrawlWorker theWorker = (plasmaCrawlWorker) obj;
|
|
theWorker.setStopped(true);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#validateObject(java.lang.Object)
|
|
*/
|
|
public boolean validateObject(Object obj) {
|
|
if (obj instanceof plasmaCrawlWorker)
|
|
{
|
|
plasmaCrawlWorker theWorker = (plasmaCrawlWorker) obj;
|
|
if (!theWorker.isAlive() || theWorker.isInterrupted()) return false;
|
|
if (theWorker.isRunning()) return true;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param obj
|
|
*
|
|
*/
|
|
public void activateObject(Object obj) {
|
|
//log.debug(" activateObject...");
|
|
}
|
|
|
|
/**
|
|
* @param obj
|
|
*
|
|
*/
|
|
public void passivateObject(Object obj) {
|
|
//log.debug(" passivateObject..." + obj);
|
|
if (obj instanceof plasmaCrawlWorker) {
|
|
plasmaCrawlWorker theWorker = (plasmaCrawlWorker) obj;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|