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Java > Open Source Codes > com > caucho > ejb > gen > StatelessPoolChain


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.ejb.gen;
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  * The pooling interceptor for stateless session beans.
40  */
41 public class StatelessPoolChain extends FilterCallChain {
42   private static L10N L = new L10N(StatelessPoolChain.class);
43
44   public StatelessPoolChain(CallChain next)
45   {
46     super(next);
47   }
48   
49   /**
50    * Prints a call within the same JVM
51    *
52    * @param out the java source stream
53    * @param var the object with the method
54    * @param args the call's arguments
55    */
56   public void generateCall(JavaWriter out, String JavaDoc retVar,
57                String JavaDoc var, String JavaDoc []args)
58     throws IOException JavaDoc
59   {
60     out.println("Bean ptr = _context._ejb_begin(trans);");
61     
62     out.println("try {");
63     out.pushDepth();
64
65     super.generateCall(out, retVar, "ptr", args);
66     
67     out.popDepth();
68     out.println("} catch (RuntimeException e) {");
69     out.pushDepth();
70     out.println("ptr = null;");
71
72     out.println("throw e;");
73     
74     out.popDepth();
75
76     out.println("} finally {");
77     out.pushDepth();
78
79     out.println("_context._ejb_free(ptr);");
80
81     out.popDepth();
82     out.println("}");
83   }
84 }
85
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