1 files changed, 76 insertions, 0 deletions
diff --git a/integrity-monitor/src/main/java/org/openecomp/policy/common/im/StateChangeNotifier.java b/integrity-monitor/src/main/java/org/openecomp/policy/common/im/StateChangeNotifier.java
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+++ b/integrity-monitor/src/main/java/org/openecomp/policy/common/im/StateChangeNotifier.java
@@ -0,0 +1,76 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Integrity Monitor
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.policy.common.im;
+ 
+import java.util.Observable; 
+import java.util.Observer; 
+/* 
+ * This is implementing the Observer interface to make it specific for
+ * state management.
+ * 
+ * It saves the StateManagement object and a String message that is 
+ * passed in when notifyObservers is called by the Observable 
+ * host class. 
+ * 
+ * It provides an abstract method for handling the state change 
+ * so this class must be overwritten and made concrete for the 
+ * Observer who is monitoring the state changes. 
+ */
+
+//import org.apache.log4j.Logger; 
+import org.openecomp.policy.common.logging.flexlogger.FlexLogger; 
+import org.openecomp.policy.common.logging.flexlogger.Logger;
+
+/**
+ * 
+ * StateChangeNotifier class implements the Observer pattern and is used to distribute
+ * state change notifications to any entity that registers a derived class with an 
+ * instance of the StateManagement class. 
+ *
+ */
+public class StateChangeNotifier implements Observer { 
+	private static final Logger logger = FlexLogger.getLogger(StateChangeNotifier.class);
+	//The observable class 
+	StateManagement stateManagement; 
+ 
+	// A string argument passed by the observable class when 
+	// Observable:notifyObservers(Object arg) is called 
+	String message; 
+ 
+	@Override 
+	public void update(Observable o, Object arg) { 
+		this.stateManagement = (StateManagement) o; 
+		this.message = (String) arg; 
+		handleStateChange(); 
+	} 
+ 
+	public void handleStateChange() {
+		logger.debug("handleStateChange, message: " + this.message);
+	}
+
+	public StateManagement getStateManagement() {
+		return stateManagement;
+	}
+
+	public String getMessage() {
+		return message;
+	}
+} 
+\ No newline at end of file