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1   /***
2    * 
3    * Copyright 2005 LogicBlaze, Inc. http://www.logicblaze.com
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.jencks.factory;
19  
20  import java.util.Map;
21  
22  import org.apache.geronimo.transaction.context.GeronimoTransactionManager;
23  import org.apache.geronimo.transaction.context.TransactionContextManager;
24  import org.springframework.beans.factory.FactoryBean;
25  import org.springframework.beans.factory.InitializingBean;
26  import org.springframework.context.ApplicationContext;
27  import org.springframework.context.ApplicationContextAware;
28  
29  /***
30   * This FactoryBean creates and configures the Geronimo implementation
31   * of the UserTransaction and TransactionManager interfaces.
32   * <p/>
33   * This factory is based on the Geronimo Transaction Context Manager.
34   *
35   * @version $Revision: 1.2 $
36   * @author <a href="mailto:gnt@codehaus.org">Guillaume Nodet</a>
37   * @see org.apache.geronimo.transaction.context.GeronimoTransactionManager
38   */
39  public class GeronimoTransactionManagerFactoryBean implements FactoryBean, InitializingBean, ApplicationContextAware {
40  
41  	private GeronimoTransactionManager transactionManager;
42  	private ApplicationContext applicationContext;
43      private TransactionContextManager transactionContextManager;
44  	
45  	public Object getObject() throws Exception {
46  		if (transactionManager == null) {
47  			transactionManager = new GeronimoTransactionManager(getTransactionContextManager());
48  		}
49  		return transactionManager;
50  	}
51  
52  	public Class getObjectType() {
53  		return GeronimoTransactionManager.class;
54  	}
55  
56  	public boolean isSingleton() {
57  		return true;
58  	}
59  
60  	public void afterPropertiesSet() throws Exception {
61  	}
62  
63  	public void setApplicationContext(ApplicationContext applicationContext) {
64  		this.applicationContext = applicationContext;
65  	}
66  
67  	public TransactionContextManager getTransactionContextManager() {
68  		if (transactionContextManager == null) {
69  			Map map = applicationContext.getBeansOfType(TransactionContextManager.class);
70  			if (map.size() == 1) {
71  				transactionContextManager = (TransactionContextManager) map.values().iterator().next();
72  			} else {
73  				throw new IllegalStateException("no TransactionContextManager is registered");
74  			}
75  		}
76  		return transactionContextManager;
77  	}
78  
79  	public void setTransactionContextManager(TransactionContextManager transactionContextManager) {
80  		this.transactionContextManager = transactionContextManager;
81  	}
82  
83  }