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1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jelly.tags.jms;
17  
18  import javax.jms.JMSException;
19  
20  import org.apache.commons.jelly.JellyTagException;
21  import org.apache.commons.jelly.TagSupport;
22  import org.apache.commons.jelly.XMLOutput;
23  import org.apache.commons.messenger.Messenger;
24  import org.apache.commons.messenger.MessengerManager;
25  
26  /*** Defines a JMS connection for use by other JMS tags.
27    *
28    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
29    * @version $Revision: 155420 $
30    */
31  public class ConnectionTag extends TagSupport implements ConnectionContext {
32  
33      /*** The variable name to create */
34      private String var;
35  
36      /*** Stores the name of the map entry */
37      private String name;
38  
39      /*** The Messenger */
40      private Messenger connection;
41  
42      // ConnectionContext interface
43      //-------------------------------------------------------------------------
44      public Messenger getConnection() {
45          return connection;
46      }
47  
48      // Tag interface
49      //-------------------------------------------------------------------------
50      public void doTag(XMLOutput output) throws JellyTagException {
51  
52          try {
53              connection = MessengerManager.get( name );
54          }
55          catch (JMSException e) {
56              throw new JellyTagException(e);
57          }
58  
59          if (connection == null) {
60              throw new JellyTagException( "Could not find a JMS connection called: " + name );
61          }
62  
63          if ( var != null ) {
64              context.setVariable( var, connection );
65          }
66  
67          invokeBody(output);
68      }
69  
70      // Properties
71      //-------------------------------------------------------------------------
72  
73      /*** Sets the name of the Messenger (JMS connection pool) to use
74        */
75      public void setName(String name) {
76          this.name = name;
77      }
78  
79      /*** Sets the variable name to use for the exported Messenger (JMS connection pool)
80        */
81      public void setVar(String var) {
82          this.var = var;
83      }
84  }