org.apache.hadoop.yarn.api.protocolrecords.StartContainersRequest.java Source code

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Here is the source code for org.apache.hadoop.yarn.api.protocolrecords.StartContainersRequest.java

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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.hadoop.yarn.api.protocolrecords;

import java.util.List;

import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.yarn.api.ContainerManagementProtocol;
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
import org.apache.hadoop.yarn.util.Records;

/**
 * <p>
 * The request which contains a list of {@link StartContainerRequest} sent by
 * the <code>ApplicationMaster</code> to the <code>NodeManager</code> to
 * <em>start</em> containers.
 * </p>
 * 
 * <p>
 * In each {@link StartContainerRequest}, the <code>ApplicationMaster</code> has
 * to provide details such as allocated resource capability, security tokens (if
 * enabled), command to be executed to start the container, environment for the
 * process, necessary binaries/jar/shared-objects etc. via the
 * {@link ContainerLaunchContext}.
 * </p>
 * 
 * @see ContainerManagementProtocol#startContainers(StartContainersRequest)
 */
@Public
@Stable
public abstract class StartContainersRequest {

    @Public
    @Stable
    public static StartContainersRequest newInstance(List<StartContainerRequest> requests) {
        StartContainersRequest request = Records.newRecord(StartContainersRequest.class);
        request.setStartContainerRequests(requests);
        return request;
    }

    /**
     * Get a list of {@link StartContainerRequest} to start containers.
     * @return a list of {@link StartContainerRequest} to start containers.
     */
    @Public
    @Stable
    public abstract List<StartContainerRequest> getStartContainerRequests();

    /**
     * Set a list of {@link StartContainerRequest} to start containers.
     * @param request a list of {@link StartContainerRequest} to start containers
     */
    @Public
    @Stable
    public abstract void setStartContainerRequests(List<StartContainerRequest> request);
}