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


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 javax.resource.ResourceException JavaDoc;
21 import javax.resource.spi.LocalTransaction JavaDoc;
22 import javax.transaction.xa.XAException JavaDoc;
23 import javax.transaction.xa.XAResource JavaDoc;
24 import javax.transaction.xa.Xid JavaDoc;
25
26 import org.apache.geronimo.transaction.manager.NamedXAResource;
27
28 /**
29  * LocalXAResource adapts a local transaction to be controlled by a
30  * JTA transaction manager. Of course, it cannot provide xa
31  * semantics.
32  *
33  *
34  * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
35  */
36 public class LocalXAResource implements NamedXAResource {
37
38     //accessible in package for testing
39 final LocalTransaction JavaDoc localTransaction;
40     private final String JavaDoc name;
41     private Xid JavaDoc xid;
42     private int transactionTimeout;
43
44     public LocalXAResource(LocalTransaction JavaDoc localTransaction, String JavaDoc name) {
45         this.localTransaction = localTransaction;
46         this.name = name;
47     }
48
49     // Implementation of javax.transaction.xa.XAResource
50
51     public void commit(Xid JavaDoc xid, boolean flag) throws XAException JavaDoc {
52         if (this.xid == null || !this.xid.equals(xid)) {
53             throw new XAException JavaDoc();
54         }
55         try {
56             localTransaction.commit();
57         } catch (ResourceException JavaDoc e) {
58             throw (XAException JavaDoc)new XAException JavaDoc().initCause(e);
59          } finally {
60             this.xid = null;
61         }
62
63     }
64
65     public void forget(Xid JavaDoc xid) throws XAException JavaDoc {
66         this.xid = null;
67     }
68
69     public int getTransactionTimeout() throws XAException JavaDoc {
70         return transactionTimeout;
71     }
72
73     public boolean isSameRM(XAResource JavaDoc xares) throws XAException JavaDoc {
74         return this == xares;
75     }
76
77     public Xid JavaDoc[] recover(int n) throws XAException JavaDoc {
78         return new Xid JavaDoc[0];
79     }
80
81     public void rollback(Xid JavaDoc xid) throws XAException JavaDoc {
82         if (this.xid == null || !this.xid.equals(xid)) {
83             throw new XAException JavaDoc();
84         }
85         try {
86             localTransaction.rollback();
87         } catch (ResourceException JavaDoc e) {
88             throw (XAException JavaDoc)new XAException JavaDoc().initCause(e);
89         } finally {
90             this.xid = null;
91         }
92     }
93
94     public boolean setTransactionTimeout(int txTimeout) throws XAException JavaDoc {
95         this.transactionTimeout = txTimeout;
96         return true;
97     }
98
99     public void start(Xid JavaDoc xid, int flag) throws XAException JavaDoc {
100         if (flag == XAResource.TMNOFLAGS) {
101             // first time in this transaction
102 if (this.xid != null) {
103                 throw new XAException JavaDoc("already enlisted");
104             }
105             this.xid = xid;
106             try {
107                 localTransaction.begin();
108             } catch (ResourceException JavaDoc e) {
109                 throw (XAException JavaDoc) new XAException JavaDoc("could not start local tx").initCause(e);
110             }
111         } else if (flag == XAResource.TMRESUME) {
112             if (xid != this.xid) {
113                 throw new XAException JavaDoc("attempting to resume in different transaction");
114             }
115         } else {
116             throw new XAException JavaDoc("unknown state");
117         }
118     }
119
120     public void end(Xid JavaDoc xid, int flag) throws XAException JavaDoc {
121         if (xid != this.xid) {
122             throw new XAException JavaDoc();
123         }
124         //we could keep track of if the flag is TMSUCCESS...
125 }
126
127     public int prepare(Xid JavaDoc xid) throws XAException JavaDoc {
128         //log warning that semantics are incorrect...
129 return XAResource.XA_OK;
130     }
131
132     public String JavaDoc getName() {
133         return name;
134     }
135 }
136
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