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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC2/modules/endpoint-tribes/src/main/java/org/apache/tuscany/sca/endpoint/tribes/MapStore.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC2/modules/endpoint-tribes/src/main/java/org/apache/tuscany/sca/endpoint/tribes/MapStore.java b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/endpoint-tribes/src/main/java/org/apache/tuscany/sca/endpoint/tribes/MapStore.java new file mode 100644 index 0000000000..9e540743bf --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/endpoint-tribes/src/main/java/org/apache/tuscany/sca/endpoint/tribes/MapStore.java @@ -0,0 +1,83 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.endpoint.tribes; + +import java.util.List; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.CopyOnWriteArrayList; + +/** + * The Map that can fire events on put/remove of entries + */ +public abstract class MapStore extends ConcurrentHashMap<Object, Object> { + private static final long serialVersionUID = -2127235547082144368L; + private List<MapListener> listeners = new CopyOnWriteArrayList<MapListener>(); + + protected MapStore(int initialCapacity, float loadFactor, int concurrencyLevel) { + super(initialCapacity, loadFactor, concurrencyLevel); + } + + @Override + public Object put(Object key, Object value) { + Object old = super.put(key, value); + if (old != null) { + for (MapListener listener : listeners) { + listener.entryUpdated(key, old, value); + } + } else { + for (MapListener listener : listeners) { + listener.entryAdded(key, value); + } + + } + return old; + } + + @Override + public Object remove(Object key) { + Object old = super.remove(key); + if (old != null) { + for (MapListener listener : listeners) { + listener.entryRemoved(key, old); + } + } + return old; + } + + public void addListener(MapListener listener) { + listeners.add(listener); + } + + public List<MapListener> getListeners() { + return listeners; + } + + public boolean removeListener(MapListener listener) { + return listeners.remove(listener); + } + + public static interface MapListener { + void entryAdded(Object key, Object value); + + void entryUpdated(Object key, Object oldValue, Object newValue); + + void entryRemoved(Object key, Object value); + } +} |