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


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.concurrent.Executor JavaDoc;
20
21 /**
22  * A {@link Notifier} which asynchronously notifies listeners to avoid large
23  * amounts of deep recursion in complex state models and activities.
24  *
25  * @version $Revision: $
26  */
27 public class AsynchronousNotifier implements Notifier {
28
29     private final Notifier delegate;
30     private final Executor JavaDoc executor;
31
32     public AsynchronousNotifier(Executor JavaDoc executor) {
33         this(executor, new SynchronousNotifier());
34     }
35
36     public AsynchronousNotifier(Executor JavaDoc executor, Notifier delegate) {
37         this.executor = executor;
38         this.delegate = delegate;
39     }
40
41     public void addRunnable(Runnable JavaDoc listener) {
42         delegate.addRunnable(listener);
43     }
44
45     public void removeRunnable(Runnable JavaDoc listener) {
46         delegate.removeRunnable(listener);
47     }
48
49     public void run() {
50         executor.execute(delegate);
51     }
52
53 }
54
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