org.springframework.yarn.am.container.ContainerResolver Maven / Gradle / Ivy
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/*
* Copyright 2013 the original author or authors.
*
* 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.springframework.yarn.am.container;
import java.util.List;
import java.util.Map;
import org.apache.hadoop.yarn.api.records.ResourceRequest;
/**
* Interface for implementations which knows how to resolve
* container locations. This is meant for similar concepts found
* from a map/reduce framework to execute containers as close for the
* input as possible. For example if task main purpose is to access
* HDFS resources it will be much faster if those containers can be
* executed on a same host where HDFS file/block is physically placed.
*
* @author Janne Valkealahti
*
*/
public interface ContainerResolver {
/**
* Resolve resource requests.
*
* @param parameters the parameters
* @return the list of {@link ResourceRequest}s
*/
List resolve(Map parameters);
}