1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.plus.annotation;
20
21 import java.lang.reflect.Method;
22 import java.lang.reflect.Modifier;
23
24 import org.eclipse.jetty.util.log.Log;
25 import org.eclipse.jetty.util.log.Logger;
26
27 /**
28 * PreDestroyCallback
29 *
30 *
31 */
32 public class PreDestroyCallback extends LifeCycleCallback
33 {
34 private static final Logger LOG = Log.getLogger(PreDestroyCallback.class);
35
36
37 /**
38 * Commons Annotations Specification section 2.6:
39 * - no params to method
40 * - returns void
41 * - no checked exceptions
42 * - not static
43 * @see org.eclipse.jetty.plus.annotation.LifeCycleCallback#validate(java.lang.Class, java.lang.reflect.Method)
44 */
45 public void validate(Class<?> clazz, Method method)
46 {
47
48 if (method.getExceptionTypes().length > 0)
49 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot not throw a checked exception");
50
51 if (!method.getReturnType().equals(Void.TYPE))
52 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot not have a return type");
53
54 if (Modifier.isStatic(method.getModifiers()))
55 throw new IllegalArgumentException(clazz.getName()+"."+method.getName()+ " cannot be static");
56
57 }
58
59
60 public void callback(Object instance)
61 {
62 try
63 {
64 super.callback(instance);
65 }
66 catch (Exception e)
67 {
68 LOG.warn("Ignoring exception thrown on preDestroy call to "+getTargetClass()+"."+getTarget().getName(), e);
69 }
70 }
71
72 public boolean equals(Object o)
73 {
74 if (super.equals(o) && (o instanceof PreDestroyCallback))
75 return true;
76 return false;
77 }
78 }