org.apache.flink.runtime.heartbeat.NoOpHeartbeatManager Maven / Gradle / Ivy

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/*
 * 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;

/**
 * {@link HeartbeatManager} implementation which does nothing.
 *
 * @param  ignored
 * @param  ignored
 */
public class NoOpHeartbeatManager implements HeartbeatManager {
	private static final NoOpHeartbeatManager INSTANCE = new NoOpHeartbeatManager<>();

	private NoOpHeartbeatManager() {}

	@Override
	public void monitorTarget(ResourceID resourceID, HeartbeatTarget heartbeatTarget) {}

	@Override
	public void unmonitorTarget(ResourceID resourceID) {}

	@Override
	public void stop() {}

	@Override
	public long getLastHeartbeatFrom(ResourceID resourceId) {
		return 0;
	}

	@Override
	public void receiveHeartbeat(ResourceID heartbeatOrigin, I heartbeatPayload) {}

	@Override
	public void requestHeartbeat(ResourceID requestOrigin, I heartbeatPayload) {}

	@SuppressWarnings("unchecked")
	public static  NoOpHeartbeatManager getInstance() {
		return (NoOpHeartbeatManager) INSTANCE;
	}
}