org.apache.flink.runtime.heartbeat.HeartbeatManagerSenderImpl Maven / Gradle / Ivy
/*
* 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.heartbeat;
import org.apache.flink.runtime.clusterframework.types.ResourceID;
import org.apache.flink.runtime.concurrent.AcceptFunction;
import org.apache.flink.runtime.concurrent.ApplyFunction;
import org.apache.flink.runtime.concurrent.Future;
import org.apache.flink.runtime.concurrent.ScheduledExecutor;
import org.slf4j.Logger;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
/**
* {@link HeartbeatManager} implementation which regularly requests a heartbeat response from
* its monitored {@link HeartbeatTarget}. The heartbeat period is configurable.
*
* @param Type of the incoming heartbeat payload
* @param Type of the outgoing heartbeat payload
*/
public class HeartbeatManagerSenderImpl extends HeartbeatManagerImpl implements Runnable {
private final ScheduledFuture triggerFuture;
public HeartbeatManagerSenderImpl(
long heartbeatPeriod,
long heartbeatTimeout,
ResourceID ownResourceID,
HeartbeatListener heartbeatListener,
Executor executor,
ScheduledExecutor scheduledExecutor,
Logger log) {
super(
heartbeatTimeout,
ownResourceID,
heartbeatListener,
executor,
scheduledExecutor,
log);
triggerFuture = scheduledExecutor.scheduleAtFixedRate(this, 0L, heartbeatPeriod, TimeUnit.MILLISECONDS);
}
@Override
public void run() {
if (!stopped) {
log.debug("Trigger heartbeat request.");
for (HeartbeatMonitor heartbeatMonitor : getHeartbeatTargets()) {
Future futurePayload = getHeartbeatListener().retrievePayload();
final HeartbeatTarget heartbeatTarget = heartbeatMonitor.getHeartbeatTarget();
if (futurePayload != null) {
Future requestHeartbeatFuture = futurePayload.thenAcceptAsync(new AcceptFunction() {
@Override
public void accept(O payload) {
heartbeatTarget.requestHeartbeat(getOwnResourceID(), payload);
}
}, getExecutor());
requestHeartbeatFuture.exceptionally(new ApplyFunction() {
@Override
public Void apply(Throwable failure) {
log.warn("Could not request the heartbeat from target {}.", heartbeatTarget, failure);
return null;
}
});
} else {
heartbeatTarget.requestHeartbeat(getOwnResourceID(), null);
}
}
}
}
@Override
public void stop() {
triggerFuture.cancel(true);
super.stop();
}
}