001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.process.local;
016    
017    import com.liferay.portal.kernel.concurrent.AsyncBroker;
018    import com.liferay.portal.kernel.concurrent.FutureListener;
019    import com.liferay.portal.kernel.concurrent.NoticeableFuture;
020    import com.liferay.portal.kernel.process.ProcessCallable;
021    import com.liferay.portal.kernel.process.ProcessChannel;
022    
023    import java.io.IOException;
024    import java.io.ObjectOutputStream;
025    import java.io.Serializable;
026    
027    import java.util.Map;
028    import java.util.concurrent.Future;
029    import java.util.concurrent.atomic.AtomicLong;
030    
031    /**
032     * @author Shuyang Zhou
033     */
034    public class LocalProcessChannel<T extends Serializable>
035            implements ProcessChannel<T> {
036    
037            public LocalProcessChannel(
038                    NoticeableFuture<T> noticeableFuture,
039                    ObjectOutputStream objectOutputStream,
040                    AsyncBroker<Long, Serializable> asyncBroker) {
041    
042                    _noticeableFuture = noticeableFuture;
043                    _objectOutputStream = objectOutputStream;
044                    _asyncBroker = asyncBroker;
045    
046                    _noticeableFuture.addFutureListener(
047                            new FutureListener<T>() {
048    
049                                    @Override
050                                    public void complete(Future<T> future) {
051                                            try {
052                                                    _objectOutputStream.close();
053                                            }
054                                            catch (IOException ioe) {
055                                            }
056                                            finally {
057                                                    Map<Long, NoticeableFuture<Serializable>> map =
058                                                            _asyncBroker.getOpenBids();
059    
060                                                    for (NoticeableFuture<Serializable> noticeableFuture :
061                                                                    map.values()) {
062    
063                                                            noticeableFuture.cancel(true);
064                                                    }
065                                            }
066                                    }
067    
068                            });
069            }
070    
071            @Override
072            public NoticeableFuture<T> getProcessNoticeableFuture() {
073                    return _noticeableFuture;
074            }
075    
076            @Override
077            public <V extends Serializable> NoticeableFuture<V> write(
078                    ProcessCallable<V> processCallable) {
079    
080                    long id = _idGenerator.getAndIncrement();
081    
082                    NoticeableFuture<Serializable> noticeableFuture = _asyncBroker.post(id);
083    
084                    try {
085                            _objectOutputStream.writeObject(
086                                    new RequestProcessCallable<V>(id, processCallable));
087    
088                            _objectOutputStream.flush();
089                    }
090                    catch (IOException ioe) {
091                            _asyncBroker.takeWithException(id, ioe);
092                    }
093    
094                    return (NoticeableFuture<V>)noticeableFuture;
095            }
096    
097            private final AsyncBroker<Long, Serializable> _asyncBroker;
098            private final AtomicLong _idGenerator = new AtomicLong();
099            private final NoticeableFuture<T> _noticeableFuture;
100            private final ObjectOutputStream _objectOutputStream;
101    
102    }