/*******************************************************************************
* 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;
/********
* A simple wrapper to the usm, passed to threads that can notify the USM of the failure of the service. Having one such
* object makes it easier to handle concurrent notifications of such a failure..
*
* @author barakme
*
*/
public class ProcessDeathNotifier {
private boolean processDead = false;
private final UniversalServiceManagerBean usm;
public ProcessDeathNotifier(final UniversalServiceManagerBean usm) {
super();
this.usm = usm;
}
/*********
* Called by an object on a different thread, typically a stop detector, to notify the USM that the service is down.
* Only the first invocation by a thread that the service has died will be passed to the USM.
* This method blocks until the USM has finished handling the service death notification.
*/
public synchronized void processDeathDetected() {
if (processDead) {
return;
}
processDead = true;
usm.onProcessDeath();
}
}