nonblockingoutgoingqueue.java.svn-base

来自「cqME :java framework for TCK test.」· SVN-BASE 代码 · 共 109 行

/*
 * $Id$
 *
 * Copyright 1996-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 *
 * 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 version 2 for more details (a copy is
 * included at /legal/license.txt).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 *
 */

package com.sun.tck.j2me.execution.queue;

import java.util.LinkedList;

import com.sun.tck.j2me.services.ServiceFault;

/**
 * This class is used to create non-blocking OutgoingQueue using blocking
 * OutgoingQueue. It might be used in command which can not be blocking.
 * For example CommunicationServer handler can not block server.
 */
public class NonBlockingOutgoingQueue implements OutgoingQueue {
    private OutgoingQueue queue;
    private Thread thread;
    private Putter putter;

    private class Putter implements Runnable {
        private boolean isStopped = false;

        public synchronized void stop() {
            isStopped = true;
            synchronized (list) {
                list.notifyAll();
            }
        }

        public synchronized boolean isStopped() {
            return isStopped;
        }

        public void run() {
            try {
                while (!isStopped()) {
                    Request request = null;
                    synchronized (list) {
                        if (!list.isEmpty()) {
                            request = list.removeFirst();
                        } else {
                            list.wait(5000L);
                        }
                    }
                    if (request != null) {
                        queue.putRequest(request);
                    }
                }
            } catch (InterruptedException e) {
                return;
            }
        }
    };

    private LinkedList<Request> list = new LinkedList<Request>();

    public NonBlockingOutgoingQueue(OutgoingQueue queue) {
        this.queue = queue;
    }

    public boolean isBlocking() {
        return false;
    }

    public void start()
            throws ServiceFault {
        putter = new Putter();
        thread = new Thread(putter);
        thread.start();
    }

    public void stop()
            throws ServiceFault {
        putter.stop();
        thread.interrupt();
    }

    public void putRequest(Request request) {
        synchronized (list) {
            list.add(request);
            list.notifyAll();
        }
    }
}