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Java > Open Source Codes > org > apache > servicemix > beanflow > support > SynchronousNotifier


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */

17 package org.apache.servicemix.beanflow.support;
18
19 import java.util.ArrayList JavaDoc;
20 import java.util.List JavaDoc;
21
22 /**
23  * A default {@link Notifier} which just performs the notifications
24  * synchronously as the state changes.
25  *
26  * @version $Revision: $
27  */

28 public class SynchronousNotifier implements Notifier {
29     private List JavaDoc<Runnable JavaDoc> listeners = new ArrayList JavaDoc<Runnable JavaDoc>();
30
31     public void addRunnable(Runnable JavaDoc listener) {
32         synchronized (listeners) {
33             listeners.add(listener);
34         }
35     }
36
37     public void removeRunnable(Runnable JavaDoc listener) {
38         synchronized (listeners) {
39             listeners.remove(listener);
40         }
41     }
42
43     public void run() {
44         Runnable JavaDoc[] array = null;
45         synchronized (listeners) {
46             array = new Runnable JavaDoc[listeners.size()];
47             listeners.toArray(array);
48         }
49         for (Runnable JavaDoc listener : array) {
50             listener.run();
51         }
52     }
53
54 }
55
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