1 files changed, 70 insertions, 0 deletions
diff --git a/appc-client/client-lib/src/main/java/org/onap/appc/client/impl/core/CoreRegistry.java b/appc-client/client-lib/src/main/java/org/onap/appc/client/impl/core/CoreRegistry.java
new file mode 100644
index 000000000..e0a0c5b34
--- /dev/null
+++ b/appc-client/client-lib/src/main/java/org/onap/appc/client/impl/core/CoreRegistry.java
@@ -0,0 +1,70 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * Licensed 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.
+ * 
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.appc.client.impl.core;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/** client lib Registry
+ */
+class CoreRegistry<T>{
+    private Map<String, T> registry =
+            new ConcurrentHashMap<String, T>();
+
+    final private EmptyRegistryCallback emptyRegistryCallback;
+
+
+    CoreRegistry(EmptyRegistryCallback emptyRegistryCallback){
+        this.emptyRegistryCallback = emptyRegistryCallback;
+    }
+
+    void register(String key, T obj) {
+        registry.put(key, obj);
+    }
+
+    <T> T unregister(String key) {
+        T item = (T) registry.remove(key);
+        if(registry.isEmpty()) {
+            emptyRegistryCallback.emptyCallback();
+        }
+        return item;
+    }
+
+    <T> T get(String key){
+        return (T) registry.get(key);
+    }
+
+    synchronized boolean isExist(String key) {
+        return registry.containsKey(key);
+    }
+
+    boolean isEmpty(){
+        return registry.isEmpty();
+    }
+
+    public interface EmptyRegistryCallback{
+        void emptyCallback();
+    }
+}