org.jgentleframework.utils.network.sockets.MonitoringServerSocket.java Source code

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Here is the source code for org.jgentleframework.utils.network.sockets.MonitoringServerSocket.java

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/*
 * Copyright 2007-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 * 
 * Project: JGentleFramework
 */
package org.jgentleframework.utils.network.sockets;

import java.net.*;
import java.io.*;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * This class implements Monitoring Server Sockets basing on
 * {@link MonitoringSocket}
 * 
 * @author LE QUOC CHUNG - mailto: <a
 *         href="mailto:skydunkpro@yahoo.com">skydunkpro@yahoo.com</a>
 * @date Mar 5, 2008
 * @see MonitoringSocket
 */
public class MonitoringServerSocket extends ServerSocket {
    /** The _number of open sockets. */
    private static int numberOfOpenSockets = 0;

    /** The log. */
    private final Log log = LogFactory.getLog(getClass());

    /**
     * _increment number of open sockets.
     */
    private static void incrementNumberOfOpenSockets() {

        numberOfOpenSockets++;
    }

    /**
     * Instantiates a new monitoring server socket.
     * 
     * @param port
     *            the port
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public MonitoringServerSocket(int port) throws IOException {

        super(port);
        incrementNumberOfOpenSockets();
    }

    /*
     * (non-Javadoc)
     * @see java.net.ServerSocket#accept()
     */
    public Socket accept() throws IOException {

        Socket returnValue = new MonitoringSocket();
        implAccept(returnValue);
        return returnValue;
    }

    /*
     * (non-Javadoc)
     * @see java.net.ServerSocket#setSoTimeout(int)
     */
    public void setSoTimeout(int timeout) throws SocketException {

        super.setSoTimeout(timeout);
        printMonitoringServerSocketStatus();
    }

    /**
     * Prints the monitoring server socket status.
     */
    private synchronized void printMonitoringServerSocketStatus() {

        if (log.isInfoEnabled()) {
            log.info("There are currently " + numberOfOpenSockets + " open MonitoringServerSockets");
            try {
                log.info("\t getSoTimeout() returns " + getSoTimeout());
            } catch (IOException e) {
                log.info("\t getSoTimeout() is currently throwing an exception !");
            }
        }
    }

    /*
     * (non-Javadoc)
     * @see java.lang.Object#finalize()
     */
    protected void finalize() {

        decrementNumberOfOpenSockets();
    }

    /**
     * Decrement number of open sockets.
     */
    private static void decrementNumberOfOpenSockets() {

        numberOfOpenSockets--;
    }
}