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

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Here is the source code for org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterResponse.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 org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
import org.apache.hadoop.yarn.util.Records;

/**
 * The response sent by the <code>ResourceManager</code> to a
 * <code>ApplicationMaster</code> on it's completion.
 * <p>
 * The response, includes:
 * <ul>
 * <li>A flag which indicates that the application has successfully unregistered
 * with the RM and the application can safely stop.</li>
 * </ul>
 * <p>
 * Note: The flag indicates whether the application has successfully
 * unregistered and is safe to stop. The application may stop after the flag is
 * true. If the application stops before the flag is true then the RM may retry
 * the application.
 * 
 * @see ApplicationMasterProtocol#finishApplicationMaster(FinishApplicationMasterRequest)
 */
@Public
@Stable
public abstract class FinishApplicationMasterResponse {

    @Private
    @Unstable
    public static FinishApplicationMasterResponse newInstance(boolean isRemovedFromRMStateStore) {
        FinishApplicationMasterResponse response = Records.newRecord(FinishApplicationMasterResponse.class);
        response.setIsUnregistered(isRemovedFromRMStateStore);
        return response;
    }

    /**
     * Get the flag which indicates that the application has successfully
     * unregistered with the RM and the application can safely stop.
     * @return true if the application has unregistered with the RM,
     *         false otherwise
     */
    @Public
    @Stable
    public abstract boolean getIsUnregistered();

    /**
     * Set the flag which indicates that the application has successfully
     * unregistered with the RM and the application can safely stop.
     * @param isUnregistered boolean flag to indicate that the application has
     *        successfully unregistered with the RM
     */
    @Private
    @Unstable
    public abstract void setIsUnregistered(boolean isUnregistered);
}