1 /***
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 *
14 **/
15 package org.jencks.pool;
16
17 import javax.jms.JMSException;
18 import javax.jms.XAConnection;
19 import javax.jms.XASession;
20
21 import org.apache.commons.pool.PoolableObjectFactory;
22 import org.apache.commons.pool.ObjectPool;
23 import org.apache.commons.pool.impl.GenericObjectPool;
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26
27 public class XASessionPool implements PoolableObjectFactory
28 {
29 private static final Log log = LogFactory.getLog(XASessionPool.class);
30
31 private XAConnection connection;
32 private ObjectPool sessionPool;
33
34 public XASessionPool(final XAConnection connection)
35 {
36 this(connection, new GenericObjectPool(null, -1));
37 }
38
39 public XASessionPool(final XAConnection connection,
40 final ObjectPool sessionPool)
41 {
42 this.connection = connection;
43 this.sessionPool = sessionPool;
44 sessionPool.setFactory(this);
45 }
46
47 public PooledSpringXASession borrowSession() throws JMSException
48 {
49 try {
50 if(log.isDebugEnabled()) log.debug("---->>>>> BORROWING JMS SESSION FROM POOL...");
51 Object object = sessionPool.borrowObject();
52 if(log.isDebugEnabled()) log.debug("---->>>>> BORROWED SESSION: " + object);
53 return (PooledSpringXASession) object;
54 }
55 catch (JMSException e) {
56 throw e;
57 }
58 catch (Exception e) {
59 final JMSException jmsException = new JMSException("Unhandled exception");
60 jmsException.initCause(e);
61 throw jmsException;
62 }
63 }
64
65
66
67
68
69 public Object makeObject() throws Exception
70 {
71 if(log.isDebugEnabled()) log.debug("---->>>>> CREATING NEW SESSION TO SATISFY REQUEST!!");
72 return new PooledSpringXASession(createSession(), sessionPool);
73 }
74
75 public void destroyObject(Object o) throws Exception
76 {
77 if(log.isDebugEnabled()) log.debug("---->>>>> DESTROYING SESSION AND PERMANENTLY REMOVING FROM POOL: " + o);
78 PooledSpringXASession session = (PooledSpringXASession) o;
79 session.getActualSession().close();
80 }
81
82 public boolean validateObject(Object o)
83 {
84 return true;
85 }
86
87 public void activateObject(Object o) throws Exception
88 {
89 }
90
91 public void passivateObject(Object o) throws Exception
92 {
93 if(log.isDebugEnabled()) log.debug("---->>>>> SESSION HAS BEEN RETURNED TO POOL: " + o);
94 }
95
96
97
98 protected XAConnection getConnection() throws JMSException
99 {
100 if (this.connection == null) {
101 throw new JMSException("Already closed");
102 }
103 return connection;
104 }
105
106 protected XASession createSession() throws JMSException
107 {
108 return getConnection().createXASession();
109 }
110
111
112 }