processorutility.java

来自「java 开发的sip软电话 源码 jain sip」· Java 代码 · 共 143 行

/* ====================================================================
 * The Apache Software License, Version 1.1
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 * reserved.
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 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    distribution.
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 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * This software consists of voluntary contributions made by many
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 * Portions of this software are based upon public domain software
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package net.java.mais.media;

import javax.media.ControllerClosedEvent;
import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.Processor;

/**
 * <p>Title: SIP COMMUNICATOR</p>
 * <p>Description:JAIN-SIP Audio/Video phone application</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Organisation: LSIIT laboratory (http://lsiit.u-strasbg.fr) </p>
 * <p>Network Research Team (http://www-r2.u-strasbg.fr))</p>
 * <p>Louis Pasteur University - Strasbourg - France</p>
 * <p>Division Chief: Thomas Noel</p>
 * @author Emil Ivov (http://www.emcho.com)
 * @version 1.1
 *
 */
class ProcessorUtility
    implements ControllerListener
{
    Integer stateLock = new Integer(0);
    public ProcessorUtility()
    {
    }

    private boolean failed = false;
    Integer getStateLock()
    {
        return stateLock;
    }

    void setFailed()
    {
        failed = true;
    }

    public void controllerUpdate(ControllerEvent ce)
    {
        // If there was an error during configure or
        // realize, the processor will be closed
        if (ce instanceof ControllerClosedEvent) {
            setFailed();
            // All controller events, send a notification
            // to the waiting thread in waitForState method.
        }
        if (ce instanceof ControllerEvent) {
            synchronized (getStateLock()) {
                getStateLock().notifyAll();
            }
        }
    }

    synchronized boolean waitForState(Processor p, int state)
    {
        p.addControllerListener(this);
        failed = false;
        // Call the required method on the processor
        if (state == Processor.Configured) {
            p.configure();
        }
        else if (state == Processor.Realized) {
            p.realize();
        }
        // Wait until we get an event that confirms the
        // success of the method, or a failure event.
        // See StateListener inner class
        while (p.getState() < state && !failed) {
            synchronized (getStateLock()) {
                try {
                    getStateLock().wait();
                }
                catch (InterruptedException ie) {
                    return false;
                }
            }
        }
        if (failed) {
            return false;
        }
        else {
            return true;
        }
    }
}