001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2012 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    
021    package org.granite.client.messaging;
022    
023    import java.util.HashMap;
024    import java.util.Map;
025    
026    import org.granite.client.messaging.channel.MessagingChannel;
027    
028    /**
029     * @author Franck WOLFF
030     */
031    public abstract class AbstractTopicAgent implements TopicAgent {
032            
033            protected final MessagingChannel channel;
034            protected final String destination;
035            protected final String topic;
036            protected final Map<String, Object> defaultHeaders = new HashMap<String, Object>();
037    
038            public AbstractTopicAgent(MessagingChannel channel, String destination, String topic) {
039                    if (channel == null || destination == null)
040                            throw new NullPointerException("channel and destination cannot be null");
041                    this.channel = channel;
042                    this.destination = destination;
043                    this.topic = topic;
044            }
045    
046            @Override
047            public MessagingChannel getChannel() {
048                    return channel;
049            }
050    
051            @Override
052            public String getDestination() {
053                    return destination;
054            }
055    
056            @Override
057            public String getTopic() {
058                    return topic;
059            }
060            
061            @Override
062            public Map<String, Object> getDefaultHeaders() {
063                    return defaultHeaders;
064            }
065    }