1 /***
2 *
3 * Copyright 2004 Hiram Chirino
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.cache;
19
20 import java.io.IOException;
21 import java.util.Map;
22
23 import javax.jms.JMSException;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.codehaus.activemq.service.impl.PersistenceAdapterSupport;
28 import org.codehaus.activemq.store.MessageStore;
29 import org.codehaus.activemq.store.PersistenceAdapter;
30 import org.codehaus.activemq.store.PreparedTransactionStore;
31 import org.codehaus.activemq.store.TopicMessageStore;
32
33 /***
34 * Implements a {@link PersistenceAdapter} designed to
35 * to speed up access to recently added messages by using
36 * a MessageCache .
37 *
38 * @version $Revision: 1.2 $
39 */
40 public abstract class CachePersistenceAdapter extends PersistenceAdapterSupport {
41
42 private static final Log log = LogFactory.getLog(CachePersistenceAdapter.class);
43 private PersistenceAdapter longTermPersistence;
44
45 public CachePersistenceAdapter() {
46 }
47
48 public CachePersistenceAdapter(PersistenceAdapter longTermPersistence) throws IOException {
49 this.longTermPersistence = longTermPersistence;
50 }
51
52 public Map getInitialDestinations() {
53 return longTermPersistence.getInitialDestinations();
54 }
55
56 public MessageStore createQueueMessageStore(String destinationName) throws JMSException {
57 MessageStore longtermStore = longTermPersistence.createQueueMessageStore(destinationName);
58 CacheMessageStore store = new CacheMessageStore(this, longtermStore, createMessageCache(destinationName));
59 return store;
60 }
61
62 public TopicMessageStore createTopicMessageStore(String destinationName) throws JMSException {
63 TopicMessageStore longtermStore = longTermPersistence.createTopicMessageStore(destinationName);
64 CacheTopicMessageStore store = new CacheTopicMessageStore(this, longtermStore, new SimpleMessageCache());
65 return store;
66 }
67
68 public PreparedTransactionStore createPreparedTransactionStore() throws JMSException {
69 return longTermPersistence.createPreparedTransactionStore();
70 }
71
72 public void beginTransaction() throws JMSException {
73 longTermPersistence.beginTransaction();
74 }
75
76 public void commitTransaction() throws JMSException {
77 longTermPersistence.commitTransaction();
78 }
79
80 public void rollbackTransaction() {
81 longTermPersistence.rollbackTransaction();
82 }
83
84 public void start() throws JMSException {
85 longTermPersistence.start();
86 }
87
88 public void stop() throws JMSException {
89 longTermPersistence.stop();
90 }
91
92
93
94 public PersistenceAdapter getLongTermPersistence() {
95 return longTermPersistence;
96 }
97
98 public void setLongTermPersistence(PersistenceAdapter longTermPersistence) {
99 this.longTermPersistence = longTermPersistence;
100 }
101
102 /***
103 * Subclasses should override this method to change the type
104 * of MessageCache that is used to cache messages.
105 *
106 * @param destinationName
107 * @return
108 */
109 abstract protected MessageCache createMessageCache(String destinationName);
110
111 }