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.event;
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.InvalidationListener;
22:
23: /**
24: * Base implementation class for classes (especially services) that need to manage a list of
25: * {@link org.apache.tapestry.internal.events.InvalidationListener}s.
26: */
27: public class InvalidationEventHubImpl implements InvalidationEventHub {
28: private final List<InvalidationListener> _listeners = newThreadSafeList();
29:
30: /** Notifies all {@link InvalidationListener listener}s. */
31: protected final void fireInvalidationEvent() {
32: for (InvalidationListener listener : _listeners) {
33: listener.objectWasInvalidated();
34: }
35: }
36:
37: public final void addInvalidationListener(
38: InvalidationListener listener) {
39: _listeners.add(listener);
40: }
41: }
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