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Java > Open Source Codes > org > apache > geronimo > tomcat > valve > TransactionContextValve


1 /**
2  *
3  * Copyright 2003-2004 The Apache Software Foundation
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 package org.apache.geronimo.tomcat.valve;
18
19 import java.io.IOException JavaDoc;
20 import javax.servlet.ServletException JavaDoc;
21 import javax.transaction.HeuristicMixedException JavaDoc;
22 import javax.transaction.HeuristicRollbackException JavaDoc;
23 import javax.transaction.RollbackException JavaDoc;
24 import javax.transaction.SystemException JavaDoc;
25
26 import org.apache.catalina.connector.Request;
27 import org.apache.catalina.connector.Response;
28 import org.apache.catalina.valves.ValveBase;
29 import org.apache.geronimo.transaction.context.TransactionContext;
30 import org.apache.geronimo.transaction.context.TransactionContextManager;
31
32 /**
33  * @version $Rev: $ $Date: $
34  */
35 public class TransactionContextValve extends ValveBase {
36
37     private final TransactionContextManager transactionContextManager;
38
39     public TransactionContextValve(TransactionContextManager transactionContextManager){
40         this.transactionContextManager = transactionContextManager;
41     }
42
43     public void invoke(Request request, Response response) throws IOException JavaDoc, ServletException JavaDoc {
44
45         TransactionContext oldTransactionContext = transactionContextManager.getContext();
46         TransactionContext newTransactionContext = null;
47
48         if (oldTransactionContext == null || !oldTransactionContext.isInheritable()) {
49             newTransactionContext = transactionContextManager.newUnspecifiedTransactionContext();
50         }
51
52         // Pass this request on to the next valve in our pipeline
53 getNext().invoke(request, response);
54
55         try {
56             if (newTransactionContext != null) {
57                 if (newTransactionContext != transactionContextManager.getContext()) {
58                     transactionContextManager.getContext().rollback();
59                     newTransactionContext.rollback();
60                     throw new RuntimeException JavaDoc("WRONG EXCEPTION! returned from servlet call with wrong tx context");
61                 }
62                 newTransactionContext.commit();
63
64             } else {
65                 if (oldTransactionContext != transactionContextManager.getContext()) {
66                     if (transactionContextManager.getContext() != null) {
67                         transactionContextManager.getContext().rollback();
68                     }
69                     throw new RuntimeException JavaDoc("WRONG EXCEPTION! returned from servlet call with wrong tx context");
70                 }
71             }
72         } catch (SystemException JavaDoc e) {
73             throw new RuntimeException JavaDoc("WRONG EXCEPTION!", e);
74         } catch (HeuristicMixedException JavaDoc e) {
75             throw new RuntimeException JavaDoc("WRONG EXCEPTION!", e);
76         } catch (HeuristicRollbackException JavaDoc e) {
77             throw new RuntimeException JavaDoc("WRONG EXCEPTION!", e);
78         } catch (RollbackException JavaDoc e) {
79             throw new RuntimeException JavaDoc("WRONG EXCEPTION!", e);
80         } finally {
81             //this is redundant when we enter with an inheritable context and nothing goes wrong.
82 transactionContextManager.setContext(oldTransactionContext);
83         }
84     }
85 }
86
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