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Java > Open Source Codes > com > caucho > transaction > enhancer > RequiredCallChain


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.transaction.enhancer;
30
31 import com.caucho.java.JavaWriter;
32 import com.caucho.java.gen.CallChain;
33 import com.caucho.java.gen.FilterCallChain;
34 import com.caucho.util.L10N;
35
36 import java.io.IOException JavaDoc;
37
38 /**
39  * Enhancing a method objects.
40  */
41 public class RequiredCallChain extends FilterCallChain {
42   private static final L10N L = new L10N(RequiredCallChain.class);
43   
44   public RequiredCallChain(CallChain next)
45   {
46     super(next);
47   }
48
49
50   /**
51    * Generates the code for the method call.
52    *
53    * @param out the writer to the output stream.
54    * @param retVar the variable to hold the return value
55    * @param var the object to be called
56    * @param args the method arguments
57    */
58   public void generateCall(JavaWriter out, String JavaDoc retVar,
59                String JavaDoc var, String JavaDoc []args)
60     throws IOException JavaDoc
61   {
62     out.println("com.caucho.transaction.TransactionContainer _caucho_xa_c;");
63     out.println("_caucho_xa_c = com.caucho.transaction.TransactionContainer.getTransactionContainer();");
64     out.println("javax.transaction.Transaction _caucho_xa;");
65
66     out.println("_caucho_xa = _caucho_xa_c.beginRequired();");
67
68     out.println("try {");
69     out.pushDepth();
70
71     super.generateCall(out, retVar, var, args);
72       
73     out.popDepth();
74     out.println("} catch (RuntimeException e) {");
75     out.println(" _caucho_xa_c.setRollbackOnly(e);");
76     out.println(" throw e;");
77     out.println("} finally {");
78     out.println(" if (_caucho_xa == null)");
79     out.println(" _caucho_xa_c.commit(null);");
80     out.println("}");
81   }
82 }
83
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