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1   /*** 
2    * 
3    * Copyright 2004 Protique Ltd
4    * 
5    * Licensed under the Apache License, Version 2.0 (the "License"); 
6    * you may not use this file except in compliance with the License. 
7    * You may obtain a copy of the License at 
8    * 
9    * http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS, 
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
14   * See the License for the specific language governing permissions and 
15   * limitations under the License. 
16   * 
17   **/
18  package org.codehaus.activemq.store.vm;
19  
20  import org.apache.commons.logging.Log;
21  import org.apache.commons.logging.LogFactory;
22  import org.codehaus.activemq.message.ActiveMQMessage;
23  import org.codehaus.activemq.message.MessageAck;
24  import org.codehaus.activemq.service.MessageIdentity;
25  import org.codehaus.activemq.service.QueueMessageContainer;
26  import org.codehaus.activemq.store.MessageStore;
27  
28  import javax.jms.JMSException;
29  import java.util.Collections;
30  import java.util.LinkedHashMap;
31  import java.util.Map;
32  
33  /***
34   * An implementation of {@link org.codehaus.activemq.store.MessageStore} which uses a
35   *
36   * @version $Revision: 1.1 $
37   */
38  public class VMMessageStore implements MessageStore {
39      private static final Log log = LogFactory.getLog(VMMessageStore.class);
40  
41      protected Map messageTable;
42  
43      public VMMessageStore() {
44          this(new LinkedHashMap());
45      }
46  
47      public VMMessageStore(LinkedHashMap messageTable) {
48          this.messageTable = Collections.synchronizedMap(messageTable);
49      }
50  
51      public MessageIdentity addMessage(ActiveMQMessage message) throws JMSException {
52          messageTable.put(message.getJMSMessageID(), message);
53          return message.getJMSMessageIdentity();
54      }
55  
56      public ActiveMQMessage getMessage(MessageIdentity identity) throws JMSException {
57          String messageID = identity.getMessageID();
58          return (ActiveMQMessage) messageTable.get(messageID);
59      }
60  
61      public void removeMessage(MessageIdentity identity, MessageAck ack) throws JMSException {
62          String messageID = identity.getMessageID();
63          messageTable.remove(messageID);
64      }
65  
66      public void recover(QueueMessageContainer container) throws JMSException {
67      }
68  
69      public void start() throws JMSException {
70      }
71  
72      public void stop() throws JMSException {
73          messageTable.clear();
74      }
75  
76  }