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111 lines
4.3 KiB
111 lines
4.3 KiB
// serverProcessor.java
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// (C) 2008 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 27.02.2008 on http://yacy.net
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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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.server;
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import java.lang.reflect.InvocationTargetException;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.TimeUnit;
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import de.anomic.server.logging.serverLog;
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public class serverProcessor<J extends serverProcessorJob> {
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public static final int availableCPU = Runtime.getRuntime().availableProcessors();
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public static int useCPU = availableCPU;
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private ExecutorService executor;
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private BlockingQueue<J> input;
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private serverProcessor<J> output;
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private int poolsize;
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private Object environment;
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private String methodName;
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public serverProcessor(Object env, String jobExec, int inputQueueSize, serverProcessor<J> output) {
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this(env, jobExec, inputQueueSize, output, useCPU + 1);
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}
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public serverProcessor(Object env, String jobExec, int inputQueueSize, serverProcessor<J> output, int poolsize) {
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// start a fixed number of executors that handle entries in the process queue
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this.environment = env;
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this.methodName = jobExec;
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this.input = new LinkedBlockingQueue<J>(inputQueueSize);
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this.output = output;
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this.poolsize = poolsize;
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executor = Executors.newCachedThreadPool();
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for (int i = 0; i < poolsize; i++) {
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executor.submit(new serverInstantBlockingThread<J>(env, jobExec, input, output));
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}
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}
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public int queueSize() {
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return input.size();
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}
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@SuppressWarnings("unchecked")
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public void enQueue(J in) throws InterruptedException {
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// ensure that enough job executors are running
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if ((this.input == null) || (executor == null) || (executor.isShutdown()) || (executor.isTerminated())) {
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// execute serialized without extra thread
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serverLog.logWarning("PROCESSOR", "executing job " + environment.getClass().getName() + "." + methodName + " serialized");
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try {
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J out = (J) serverInstantBlockingThread.execMethod(this.environment, this.methodName).invoke(environment, new Object[]{in});
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if ((out != null) && (output != null)) output.enQueue(out);
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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e.printStackTrace();
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}
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return;
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}
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// execute concurrent in thread
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this.input.put(in);
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}
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@SuppressWarnings("unchecked")
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public void shutdown(long millisTimeout) {
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if (executor == null) return;
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if (executor.isShutdown()) return;
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// put poison pills into the queue
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for (int i = 0; i < poolsize; i++) {
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try {
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input.put((J) serverProcessorJob.poisonPill); // put a poison pill into the queue which will kill the job
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} catch (InterruptedException e) { }
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}
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// wait for shutdown
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try {
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executor.awaitTermination(millisTimeout, TimeUnit.MILLISECONDS);
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} catch (InterruptedException e) {}
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executor.shutdown();
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this.executor = null;
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this.input = null;
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}
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}
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