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Java > Open Source Codes > org > jboss > spring > callback > SpringPassivationInterceptor


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22
23 package org.jboss.spring.callback;
24
25 import java.io.Serializable JavaDoc;
26 import java.lang.reflect.Field JavaDoc;
27 import java.lang.reflect.Modifier JavaDoc;
28 import javax.annotation.PreDestroy;
29 import javax.ejb.PostActivate JavaDoc;
30 import javax.ejb.PrePassivate JavaDoc;
31 import javax.interceptor.InvocationContext;
32
33 import org.jboss.spring.support.SpringInjectionSupport;
34
35 /**
36  * Injects Spring beans only on postActivation.
37  * If you need injection also on construction, use SpringLifecycleInterceptor.
38  * Sets all non serializable, non transient fields to null before passivation.
39  *
40  * @author <a HREF="mailto:ales.justin@genera-lynx.com">Ales Justin</a>
41  * @see org.jboss.spring.support.SpringInjectionSupport
42  */
43 public class SpringPassivationInterceptor extends SpringInjectionSupport implements Serializable JavaDoc
44 {
45
46    private static final long serialVersionUID = -7259379236645796135L;
47
48    @PostActivate JavaDoc
49    public void postActivate(InvocationContext ctx) throws Exception JavaDoc
50    {
51       inject(ctx.getTarget());
52       ctx.proceed();
53    }
54
55    @PrePassivate JavaDoc
56    public void prePassivate(InvocationContext ctx) throws Exception JavaDoc
57    {
58       Field JavaDoc[] fields = getAllFields(ctx.getTarget());
59       for (Field JavaDoc f : fields)
60       {
61          boolean isSerializable = Serializable JavaDoc.class.isAssignableFrom(f.getType());
62          boolean isTransient = Modifier.isTransient(f.getModifiers());
63          if (!isSerializable && !isTransient)
64          {
65             f.setAccessible(true);
66             f.set(ctx.getTarget(), null);
67          }
68       }
69       ctx.proceed();
70    }
71
72    @PreDestroy
73    public void preDestroy(InvocationContext ctx) throws Exception JavaDoc
74    {
75       ctx.proceed();
76    }
77
78 }
79
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