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Java > Open Source Codes > org > apache > geronimo > connector > outbound > ThreadLocalCachingConnectionInterceptor


1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. 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.apache.geronimo.connector.outbound;
19
20 import java.util.Collections JavaDoc;
21
22 import javax.resource.ResourceException JavaDoc;
23
24 /**
25  *
26  *
27  * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
28  *
29  * */
30 public class ThreadLocalCachingConnectionInterceptor implements ConnectionInterceptor {
31
32     private final ConnectionInterceptor next;
33
34     private final ThreadLocal JavaDoc connections = new ThreadLocal JavaDoc();
35     private final boolean matchConnections;
36
37     public ThreadLocalCachingConnectionInterceptor(final ConnectionInterceptor next, final boolean matchConnections) {
38         this.next = next;
39         this.matchConnections = matchConnections;
40     }
41
42
43     public void getConnection(ConnectionInfo connectionInfo) throws ResourceException JavaDoc {
44         if (connectionInfo.isUnshareable()) {
45             next.getConnection(connectionInfo);
46             return;
47         }
48         ManagedConnectionInfo managedConnectionInfo = (ManagedConnectionInfo) connections.get();
49         if (managedConnectionInfo != null) {
50             if (matchConnections) {
51                 ManagedConnectionInfo mciRequest = connectionInfo.getManagedConnectionInfo();
52                 if (null != managedConnectionInfo.getManagedConnectionFactory().matchManagedConnections(
53                         Collections.singleton(managedConnectionInfo.getManagedConnection()),
54                         mciRequest.getSubject(),
55                         mciRequest.getConnectionRequestInfo()
56                 )) {
57                     connectionInfo.setManagedConnectionInfo(managedConnectionInfo);
58                     return;
59                 } else {
60                     //match failed, get a new cx after returning this one
61 connections.set(null);
62                     next.returnConnection(connectionInfo, ConnectionReturnAction.RETURN_HANDLE);
63                 }
64             } else {
65                 connectionInfo.setManagedConnectionInfo(managedConnectionInfo);
66                 return;
67             }
68         }
69         //nothing for this thread or match failed
70 next.getConnection(connectionInfo);
71         connections.set(connectionInfo.getManagedConnectionInfo());
72     }
73
74     public void returnConnection(ConnectionInfo connectionInfo, ConnectionReturnAction connectionReturnAction) {
75         if (connectionReturnAction == ConnectionReturnAction.DESTROY || connectionInfo.isUnshareable()) {
76             next.returnConnection(connectionInfo, connectionReturnAction);
77         }
78     }
79     
80     public void destroy() {
81         next.destroy();
82     }
83 }
84
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