/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.flink.runtime.process;
import akka.actor.ActorRef;
import akka.actor.Terminated;
import akka.actor.UntypedActor;
import org.slf4j.Logger;
/**
* Utility actors that monitors other actors and kills the JVM upon
* actor termination.
*/
public class ProcessReaper extends UntypedActor {
private final Logger log;
private final int exitCode;
public ProcessReaper(ActorRef watchTarget, Logger log, int exitCode) {
if (watchTarget == null || watchTarget.equals(ActorRef.noSender())) {
throw new IllegalArgumentException("Target may not be null or 'noSender'");
}
this.log = log;
this.exitCode = exitCode;
getContext().watch(watchTarget);
}
@Override
public void onReceive(Object message) {
if (message instanceof Terminated) {
try {
Terminated term = (Terminated) message;
String name = term.actor().path().toSerializationFormat();
if (log != null) {
log.error("Actor " + name + " terminated, stopping process...");
// give the log some time to reach disk
try {
Thread.sleep(100);
}
catch (InterruptedException e) {
// not really a problem if we don't sleep...
}
}
}
finally {
System.exit(exitCode);
}
}
}
}