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/*-
* ============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;
}
}
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