/**
* 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.hadoop.yarn.server.nodemanager;
import org.apache.hadoop.service.Service;
import org.apache.hadoop.yarn.api.records.ContainerId;
public interface NodeStatusUpdater extends Service {
/**
* Schedule a heartbeat to the ResourceManager outside of the normal,
* periodic heartbeating process. This is typically called when the state
* of containers on the node has changed to notify the RM sooner.
*/
void sendOutofBandHeartBeat();
/**
* Get the ResourceManager identifier received during registration
* @return the ResourceManager ID
*/
long getRMIdentifier();
/**
* Query if a container has recently completed
* @param containerId the container ID
* @return true if the container has recently completed
*/
public boolean isContainerRecentlyStopped(ContainerId containerId);
/**
* Add a container to the list of containers that have recently completed
* @param containerId the ID of the completed container
*/
public void addCompletedContainer(ContainerId containerId);
/**
* Clear the list of recently completed containers
*/
public void clearFinishedContainersFromCache();
}