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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.service.impl;
19  
20  import EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap;
21  import org.codehaus.activemq.DuplicateDurableSubscriptionException;
22  import org.codehaus.activemq.broker.BrokerClient;
23  import org.codehaus.activemq.filter.Filter;
24  import org.codehaus.activemq.message.ConsumerInfo;
25  import org.codehaus.activemq.service.Dispatcher;
26  import org.codehaus.activemq.service.Subscription;
27  import org.codehaus.activemq.service.SubscriptionContainer;
28  
29  import javax.jms.JMSException;
30  import java.util.Iterator;
31  import java.util.Map;
32  
33  /***
34   * A default RAM only implementation of the {@link SubscriptionContainer}
35   *
36   * @version $Revision: 1.1 $
37   */
38  public class SubscriptionContainerImpl implements SubscriptionContainer {
39      private Map subscriptions;
40  
41      public SubscriptionContainerImpl() {
42          this(new ConcurrentHashMap());
43      }
44  
45      public SubscriptionContainerImpl(Map subscriptions) {
46          this.subscriptions = subscriptions;
47      }
48  
49      public String toString() {
50          return super.toString() + "[size:" + subscriptions.size() + "]";
51      }
52  
53      public Subscription getSubscription(String consumerId) {
54          return (Subscription) subscriptions.get(consumerId);
55      }
56  
57      public void addSubscription(String consumerId, Subscription subscription) {
58      }
59  
60      public Subscription removeSubscription(String consumerId) {
61          return (Subscription) subscriptions.remove(consumerId);
62      }
63  
64      public Iterator subscriptionIterator() {
65          return subscriptions.values().iterator();
66      }
67  
68      public Subscription makeSubscription(Dispatcher dispatcher, ConsumerInfo info, Filter filter) {
69          Subscription subscription = createSubscription(dispatcher, info, filter);
70          subscriptions.put(info.getConsumerId(), subscription);
71          return subscription;
72      }
73  
74      public void checkForDuplicateDurableSubscription(BrokerClient client, ConsumerInfo info) throws JMSException {
75          for (Iterator iter = subscriptions.values().iterator(); iter.hasNext();) {
76              Subscription subscription = (Subscription) iter.next();
77              if (subscription.isSameDurableSubscription(info)) {
78                  throw new DuplicateDurableSubscriptionException(info);
79              }
80          }
81      }
82  
83      protected Subscription createSubscription(Dispatcher dispatcher, ConsumerInfo info, Filter filter) {
84          return new SubscriptionImpl(dispatcher, info, filter);
85      }
86  }