001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of Granite Data Services.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or modify
008 * it under the terms of the GNU Library General Public License as published by
009 * the Free Software Foundation; either version 2 of the License, or (at your
010 * option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful, but
013 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 * for more details.
016 *
017 * You should have received a copy of the GNU Library General Public License
018 * along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020 package org.granite.client.messaging;
021
022 import java.util.ArrayList;
023 import java.util.Arrays;
024 import java.util.List;
025 import java.util.concurrent.TimeUnit;
026
027 import org.granite.client.messaging.channel.Channel;
028 import org.granite.client.messaging.channel.ResponseMessageFuture;
029 import org.granite.client.messaging.messages.requests.InvocationMessage;
030
031 /**
032 * @author Franck WOLFF
033 */
034 public class RemoteService {
035
036 private final Channel channel;
037 private final String id;
038
039 public RemoteService(Channel channel, String id) {
040 if (channel == null || id == null)
041 throw new NullPointerException("channel and id cannot be null");
042 this.channel = channel;
043 this.id = id;
044 }
045
046 public Channel getChannel() {
047 return channel;
048 }
049
050 public String getId() {
051 return id;
052 }
053
054 public RemoteServiceInvocation newInvocation(String method, Object...parameters) {
055 return new RemoteServiceInvocation(this, method, parameters);
056 }
057
058 public static interface RemoteServiceInvocationChain {
059
060 RemoteServiceInvocationChain appendInvocation(String method, Object...parameters);
061 ResponseMessageFuture invoke();
062 }
063
064 public static class RemoteServiceInvocation implements RemoteServiceInvocationChain {
065
066 private final RemoteService remoteService;
067 private final InvocationMessage request;
068
069 private long timeToLive = 0L;
070 private List<ResponseListener> listeners = new ArrayList<ResponseListener>();
071
072 public RemoteServiceInvocation(RemoteService remoteService, String method, Object...parameters) {
073 if (remoteService == null)
074 throw new NullPointerException("remoteService cannot be null");
075 this.remoteService = remoteService;
076 this.request = new InvocationMessage(null, remoteService.id, method, parameters);
077 }
078
079 public RemoteServiceInvocation addListener(ResponseListener listener) {
080 if (listener != null)
081 this.listeners.add(listener);
082 return this;
083 }
084
085 public RemoteServiceInvocation addListeners(ResponseListener...listeners) {
086 if (listeners != null && listeners.length > 0)
087 this.listeners.addAll(Arrays.asList(listeners));
088 return this;
089 }
090
091 public RemoteServiceInvocation setTimeToLive(long timeToLiveMillis) {
092 return setTimeToLive(timeToLiveMillis, TimeUnit.MILLISECONDS);
093 }
094
095 public RemoteServiceInvocation setTimeToLive(long timeToLive, TimeUnit unit) {
096 if (timeToLive < 0)
097 throw new IllegalArgumentException("timeToLive cannot be negative");
098 if (unit == null)
099 throw new NullPointerException("unit cannot be null");
100 this.timeToLive = unit.toMillis(timeToLive);
101 return this;
102 }
103
104 @Override
105 public RemoteServiceInvocationChain appendInvocation(String method, Object...parameters) {
106 InvocationMessage message = request;
107 while (message.getNext() != null)
108 message = message.getNext();
109 message.setNext(new InvocationMessage(null, remoteService.id, method, parameters));
110 return this;
111 }
112
113 @Override
114 public ResponseMessageFuture invoke() {
115 request.setTimeToLive(timeToLive);
116 return remoteService.channel.send(request, listeners.toArray(new ResponseListener[listeners.size()]));
117 }
118 }
119 }