01: // Copyright 2006, 2007 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.internal.services;
16:
17: import static org.apache.tapestry.ioc.internal.util.CollectionFactory.newThreadSafeList;
18:
19: import java.util.List;
20:
21: import org.apache.tapestry.internal.events.UpdateListener;
22:
23: public class UpdateListenerHubImpl implements UpdateListenerHub {
24: private final List<UpdateListener> _listeners = newThreadSafeList();
25:
26: public void addUpdateListener(UpdateListener listener) {
27: _listeners.add(listener);
28:
29: }
30:
31: /**
32: * Notifies all {@link UpdateListener}s.
33: */
34: public void fireUpdateEvent() {
35: for (UpdateListener listener : _listeners) {
36: listener.checkForUpdates();
37: }
38: }
39: }
|