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Java > Open Source Codes > org > objectweb > easybeans > examples > statelessbean > StatelessInterceptor


1 /**
2  * EasyBeans
3  * Copyright (C) 2006 Bull S.A.S.
4  * Contact: easybeans@objectweb.org
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  * USA
20  *
21  * --------------------------------------------------------------------------
22  * $Id: StatelessInterceptor.java 450 2006-05-12 15:30:25Z benoitf $
23  * --------------------------------------------------------------------------
24  */
25
26 package org.objectweb.easybeans.examples.statelessbean;
27
28 import java.lang.reflect.Method JavaDoc;
29
30 import javax.annotation.PostConstruct;
31 import javax.interceptor.AroundInvoke;
32 import javax.interceptor.InvocationContext;
33
34 /**
35  * Simple interceptor class. Mix of business interceptors and lifecycle interceptors.
36  * @author Florent Benoit
37  */
38 public class StatelessInterceptor {
39
40     /**
41      * Another class interceptor.
42      * @param invocationContext contains attributes of invocation
43      * @return method's invocation result
44      * @throws Exception if invocation fails
45      */
46     @SuppressWarnings JavaDoc("finally")
47     @AroundInvoke
48     public Object JavaDoc toto(final InvocationContext invocationContext) throws Exception JavaDoc {
49         System.out.println("Another class interceptor");
50         Method JavaDoc m = invocationContext.getMethod();
51         // Change the returned value for add method
52 Object JavaDoc returnedValue = null;
53         try {
54             returnedValue = invocationContext.proceed();
55         } finally {
56             if (m.getName().equals("add")) {
57                 // Uncomment the following line to change the returned value
58 //return Integer.valueOf(-1);
59 return returnedValue;
60             }
61             return returnedValue;
62         }
63     }
64
65     /**
66      * Callback in an external class.
67      * @param invocationContext the invocationcontext.
68      */
69     @PostConstruct
70     public void myPostConst(final InvocationContext invocationContext) {
71         System.out.println("postConstruct in class Statelesslistener of bean " + invocationContext.getTarget());
72         try {
73             invocationContext.proceed();
74         } catch (Exception JavaDoc e) {
75             throw new RuntimeException JavaDoc("Cannot proceed invocationContext", e);
76         }
77     }
78
79 }
80
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