1 files changed, 83 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/endpoint-tribes/src/main/java/org/apache/tuscany/sca/endpoint/tribes/MapStore.java b/sca-java-2.x/tags/2.0.1-RC1/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/2.0.1-RC1/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);
+    }
+}