1 // ========================================================================
2 // Copyright (c) 2006-2009 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.eclipse.jetty.plus.annotation;
15
16 import java.lang.reflect.Method;
17 import java.lang.reflect.Modifier;
18
19 import org.eclipse.jetty.util.log.Log;
20
21 /**
22 * PreDestroyCallback
23 *
24 *
25 */
26 public class PreDestroyCallback extends LifeCycleCallback
27 {
28
29 /**
30 * Commons Annotations Specification section 2.6:
31 * - no params to method
32 * - returns void
33 * - no checked exceptions
34 * - not static
35 * @see org.eclipse.jetty.plus.annotation.LifeCycleCallback#validate(java.lang.Class, java.lang.reflect.Method)
36 */
37 public void validate(Class clazz, Method method)
38 {
39
40 if (method.getExceptionTypes().length > 0)
41 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot not throw a checked exception");
42
43 if (!method.getReturnType().equals(Void.TYPE))
44 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot not have a return type");
45
46 if (Modifier.isStatic(method.getModifiers()))
47 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot be static");
48
49 }
50
51
52 public void callback(Object instance)
53 {
54 try
55 {
56 super.callback(instance);
57 }
58 catch (Exception e)
59 {
60 Log.warn("Ignoring exception thrown on preDestroy call to "+getTargetClass()+"."+getTarget().getName(), e);
61 }
62 }
63
64 public boolean equals(Object o)
65 {
66 if (super.equals(o) && (o instanceof PreDestroyCallback))
67 return true;
68 return false;
69 }
70 }