/*******************************************************************************
* Copyright (c) 2011 GigaSpaces Technologies Ltd. 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.
*******************************************************************************/
package org.cloudifysource.usm.stopDetection;
import org.cloudifysource.usm.USMException;
import org.cloudifysource.usm.events.USMEvent;
/**************
* Stop detection event interface. An implementation is expected to check if the monitored service is up or not.
*
* @author barakme
*
*/
public interface StopDetector extends USMEvent {
/********
* Called periodically to check if the service is up.
*
* @return true if the service is stopped, false if it is functioning correctly.
* @throws USMException in case of an error while executing the detector. An exception will not cause the service to
* be considered stopped.
*/
boolean isServiceStopped()
throws USMException;
}