com.linuxbox.enkive.server.ArchivingThreadPoolServer.java Source code

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Here is the source code for com.linuxbox.enkive.server.ArchivingThreadPoolServer.java

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/*******************************************************************************
 * Copyright 2013 The Linux Box Corporation.
 *
 * This file is part of Enkive CE (Community Edition).
 *
 * Enkive CE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * Enkive CE 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with Enkive CE. If not, see
 * <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package com.linuxbox.enkive.server;

import java.net.Socket;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.RejectedExecutionException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.linuxbox.enkive.mailprocessor.AbstractMailProcessor;
import com.linuxbox.enkive.mailprocessor.ArchivingProcessor;
import com.linuxbox.enkive.mailprocessor.ThreadedProcessor;
import com.linuxbox.enkive.server.config.ThreadPoolServerConfiguration;
import com.linuxbox.util.threadpool.ThreadAspects;

/**
 * A ThreadPoolServer that does archiving.
 * 
 * @author eric
 * 
 */
public abstract class ArchivingThreadPoolServer extends ThreadPoolServer
        implements ArchivingThreadPoolServerMBean, ThreadAspects, ApplicationContextAware {
    private final static Log LOGGER = LogFactory.getLog("com.linuxbox.enkive.server");

    protected static ApplicationContext applicationContext = null;

    // private Set<AbstractMailProcessor> liveProcessors = Collections
    // .synchronizedSet(new HashSet<AbstractMailProcessor>());
    private Set<AbstractMailProcessor> liveProcessors = new HashSet<AbstractMailProcessor>();

    private int historicMessagesProcessed;
    private double historicMillisecondsPerMessage;

    public ArchivingThreadPoolServer(String serverName, int port, ThreadPoolServerConfiguration poolConfig) {
        super(serverName, port, poolConfig);
    }

    protected ThreadedProcessor initializeProcessor(Socket sessionSocket) {

        ArchivingProcessor processor = createArchivingProcessor();

        processor.initializeProcessor(this, sessionSocket);

        return processor;
    }

    @Override
    protected void createAndStartProcessor(Socket socket) throws Exception {
        // If there is space left in the queue, process the message.
        // Otherwise, reject the message and let the client end manage it.
        try {
            ThreadedProcessor session = initializeProcessor(socket);
            threadPool.execute(session);
        } catch (RejectedExecutionException e) {
            socket.close();
        }
    }

    abstract protected ArchivingProcessor createArchivingProcessor();

    /**
     * Does not incorporate data from currently running processes. Maybe this
     * should change in the future.
     */
    @Override
    public int getMessagesProcessed() {
        return historicMessagesProcessed;
    }

    /**
     * Does not incorporate data from currently running processes. Maybe this
     * should change in the future.
     */
    @Override
    public double getMillisecondsPerMessage() {
        return historicMillisecondsPerMessage;
    }

    /**
     * When a new thread starts, add it to our own internal collection, so we
     * have the opportunity to query it as it's running.
     */
    @Override
    public void beforeExecute(Thread thread, Runnable runnable) {
        if (LOGGER.isTraceEnabled())
            LOGGER.trace("in beforeExecute for " + runnable.getClass().getName());
        if (runnable instanceof AbstractMailProcessor) {
            final AbstractMailProcessor processor = (AbstractMailProcessor) runnable;
            synchronized (liveProcessors) {
                liveProcessors.add(processor);
            }
        }
    }

    /**
     * When a running thread finishes, remove it from our own internal
     * collection, and incorporate it's data to the historic data.
     */
    @Override
    public void afterExecute(Runnable runnable, Throwable throwable) {
        if (LOGGER.isTraceEnabled())
            LOGGER.trace("in afterExecute for " + runnable.getClass().getName());
        if (runnable instanceof AbstractMailProcessor) {
            final AbstractMailProcessor processor = (AbstractMailProcessor) runnable;
            synchronized (liveProcessors) {
                liveProcessors.remove(processor);
                final int threadMessagesProcessed = processor.getMessagesProcessed();
                historicMillisecondsPerMessage = (historicMillisecondsPerMessage * historicMessagesProcessed
                        + processor.getMillisecondsPerMessage() * threadMessagesProcessed)
                        / (historicMessagesProcessed + threadMessagesProcessed);
                historicMessagesProcessed += threadMessagesProcessed;
            }
        }
    }

    @Override
    public void setApplicationContext(ApplicationContext ctx) throws BeansException {
        PostfixFilterServer.applicationContext = ctx;

    }
}