1 files changed, 76 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/0.99-incubating/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/ConcurrentHashList.java b/sca-java-1.x/tags/0.99-incubating/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/ConcurrentHashList.java
new file mode 100644
index 0000000000..1eee0a2c42
--- /dev/null
+++ b/sca-java-1.x/tags/0.99-incubating/modules/contribution-impl/src/main/java/org/apache/tuscany/sca/contribution/service/util/ConcurrentHashList.java
@@ -0,0 +1,76 @@
+/*
+ * 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.contribution.service.util;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class ConcurrentHashList <K,T> {
+    private Map<K, List<T>> hashList;
+
+    public ConcurrentHashList() {
+        hashList = new  ConcurrentHashMap<K, List<T>>();
+    }
+
+    public ConcurrentHashList(int initialCapacity) {
+        hashList = new  ConcurrentHashMap<K, List<T>>(initialCapacity);
+    }
+    
+    public void clear() {
+        hashList.clear();
+    }
+
+    public List<T> get(K key) {
+        List<T> resultList = hashList.get(key);
+        if( resultList == null) {
+            resultList = new ArrayList<T>();
+            hashList.put(key, resultList);
+        }
+        return resultList;
+    }
+
+    public boolean isEmpty() {
+        return hashList.isEmpty();
+    }
+
+    public T put(K key, T value) {
+        this.get(key).add(value);
+        return value;
+    }
+
+    public int size() {
+        return hashList.size();
+    }
+
+
+    public static void main(String args[]) {
+        ConcurrentHashList<String, String> list = new ConcurrentHashList<String, String>();
+        list.put("a", "a1");
+        list.put("a", "a2");
+        list.put("a", "a3");
+        
+        for(String s : list.get("a")) {
+            System.out.println("Key a - " + s);
+        }
+    }
+    
+}