1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.plus.annotation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* LifeCycleCallbackCollection
*/
public class LifeCycleCallbackCollection
{
private static final Logger LOG = Log.getLogger(LifeCycleCallbackCollection.class);
public static final String LIFECYCLE_CALLBACK_COLLECTION = "org.eclipse.jetty.lifecyleCallbackCollection";
private HashMap<String, List<LifeCycleCallback>> postConstructCallbacksMap = new HashMap<String, List<LifeCycleCallback>>();
private HashMap<String, List<LifeCycleCallback>> preDestroyCallbacksMap = new HashMap<String, List<LifeCycleCallback>>();
/**
* Add a Callback to the list of callbacks.
*
* @param callback the callback
*/
public void add (LifeCycleCallback callback)
{
if ((callback==null) || (callback.getTargetClassName()==null))
return;
if (LOG.isDebugEnabled())
LOG.debug("Adding callback for class="+callback.getTargetClass()+ " on "+callback.getTarget());
Map<String, List<LifeCycleCallback>> map = null;
if (callback instanceof PreDestroyCallback)
map = preDestroyCallbacksMap;
if (callback instanceof PostConstructCallback)
map = postConstructCallbacksMap;
if (map == null)
throw new IllegalArgumentException ("Unsupported lifecycle callback type: "+callback);
List<LifeCycleCallback> callbacks = map.get(callback.getTargetClassName());
if (callbacks==null)
{
callbacks = new ArrayList<LifeCycleCallback>();
map.put(callback.getTargetClassName(), callbacks);
}
//don't add another callback for exactly the same method
if (!callbacks.contains(callback))
callbacks.add(callback);
}
public List<LifeCycleCallback> getPreDestroyCallbacks (Object o)
{
if (o == null)
return null;
Class<? extends Object> clazz = o.getClass();
return preDestroyCallbacksMap.get(clazz.getName());
}
public List<LifeCycleCallback> getPostConstructCallbacks (Object o)
{
if (o == null)
return null;
Class<? extends Object> clazz = o.getClass();
return postConstructCallbacksMap.get(clazz.getName());
}
/**
* Call the method, if one exists, that is annotated with <code>@PostConstruct</code>
* or with <code><post-construct></code> in web.xml
* @param o the object on which to attempt the callback
* @throws Exception if unable to call {@link PostConstructCallback}
*/
public void callPostConstructCallback (Object o)
throws Exception
{
if (o == null)
return;
Class<? extends Object> clazz = o.getClass();
List<LifeCycleCallback> callbacks = postConstructCallbacksMap.get(clazz.getName());
if (callbacks == null)
return;
for (int i=0;i<callbacks.size();i++)
{
((LifeCycleCallback)callbacks.get(i)).callback(o);
}
}
/**
* Call the method, if one exists, that is annotated with <code>@PreDestroy</code>
* or with <code><pre-destroy></code> in web.xml
* @param o the object on which to attempt the callback
* @throws Exception if unable to call {@link PreDestroyCallback}
*/
public void callPreDestroyCallback (Object o)
throws Exception
{
if (o == null)
return;
Class<? extends Object> clazz = o.getClass();
List<LifeCycleCallback> callbacks = preDestroyCallbacksMap.get(clazz.getName());
if (callbacks == null)
return;
for (int i=0;i<callbacks.size();i++)
((LifeCycleCallback)callbacks.get(i)).callback(o);
}
/**
* Generate a read-only view of the post-construct callbacks
* @return the map of {@link PostConstructCallback}s
*/
public Map<String, List<LifeCycleCallback>> getPostConstructCallbackMap()
{
return Collections.unmodifiableMap(postConstructCallbacksMap);
}
/**
* Generate a read-only view of the pre-destroy callbacks
* @return the map of {@link PreDestroyCallback}s
*/
public Map<String, List<LifeCycleCallback>> getPreDestroyCallbackMap()
{
return Collections.unmodifiableMap(preDestroyCallbacksMap);
}
/**
* Amalgamate all post-construct callbacks and return a read only list
* @return the collection of {@link PostConstructCallback}s
*/
public Collection<LifeCycleCallback> getPostConstructCallbacks()
{
List<LifeCycleCallback> list = new ArrayList<LifeCycleCallback>();
for (String s:postConstructCallbacksMap.keySet())
{
list.addAll(postConstructCallbacksMap.get(s));
}
return Collections.unmodifiableCollection(list);
}
/**
* Amalgamate all pre-destroy callbacks and return a read only list
* @return the collection of {@link PreDestroyCallback}s
*/
public Collection<LifeCycleCallback> getPreDestroyCallbacks()
{
List<LifeCycleCallback> list = new ArrayList<LifeCycleCallback>();
for (String s:preDestroyCallbacksMap.keySet())
{
list.addAll(preDestroyCallbacksMap.get(s));
}
return Collections.unmodifiableCollection(list);
}
}
|
