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

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Here is the source code for org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterRequest.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.Public;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
import org.apache.hadoop.yarn.util.Records;

/**
 * The finalization request sent by the {@code ApplicationMaster} to
 * inform the {@code ResourceManager} about its completion.
 * <p>
 * The final request includes details such:
 * <ul>
 *   <li>Final state of the {@code ApplicationMaster}</li>
 *   <li>
 *     Diagnostic information in case of failure of the
 *     {@code ApplicationMaster}
 *   </li>
 *   <li>Tracking URL</li>
 * </ul>
 *
 * @see ApplicationMasterProtocol#finishApplicationMaster(FinishApplicationMasterRequest)
 */
@Public
@Stable
public abstract class FinishApplicationMasterRequest {

    @Public
    @Stable
    public static FinishApplicationMasterRequest newInstance(FinalApplicationStatus finalAppStatus,
            String diagnostics, String url) {
        FinishApplicationMasterRequest request = Records.newRecord(FinishApplicationMasterRequest.class);
        request.setFinalApplicationStatus(finalAppStatus);
        request.setDiagnostics(diagnostics);
        request.setTrackingUrl(url);
        return request;
    }

    /**
     * Get <em>final state</em> of the <code>ApplicationMaster</code>.
     * @return <em>final state</em> of the <code>ApplicationMaster</code>
     */
    @Public
    @Stable
    public abstract FinalApplicationStatus getFinalApplicationStatus();

    /**
     * Set the <em>final state</em> of the <code>ApplicationMaster</code>
     * @param finalState <em>final state</em> of the <code>ApplicationMaster</code>
     */
    @Public
    @Stable
    public abstract void setFinalApplicationStatus(FinalApplicationStatus finalState);

    /**
     * Get <em>diagnostic information</em> on application failure.
     * @return <em>diagnostic information</em> on application failure
     */
    @Public
    @Stable
    public abstract String getDiagnostics();

    /**
     * Set <em>diagnostic information</em> on application failure.
     * @param diagnostics <em>diagnostic information</em> on application failure
     */
    @Public
    @Stable
    public abstract void setDiagnostics(String diagnostics);

    /**
     * Get the <em>tracking URL</em> for the <code>ApplicationMaster</code>.
     * This url if contains scheme then that will be used by resource manager
     * web application proxy otherwise it will default to http.
     * @return <em>tracking URL</em>for the <code>ApplicationMaster</code>
     */
    @Public
    @Stable
    public abstract String getTrackingUrl();

    /**
     * Set the <em>final tracking URL</em>for the <code>ApplicationMaster</code>.
     * This is the web-URL to which ResourceManager or web-application proxy will
     * redirect client/users once the application is finished and the
     * <code>ApplicationMaster</code> is gone.
     * <p>
     * If the passed url has a scheme then that will be used by the
     * ResourceManager and web-application proxy, otherwise the scheme will
     * default to http.
     * </p>
     * <p>
     * Empty, null, "N/A" strings are all valid besides a real URL. In case an url
     * isn't explicitly passed, it defaults to "N/A" on the ResourceManager.
     * <p>
     *
     * @param url
     *          <em>tracking URL</em>for the <code>ApplicationMaster</code>
     */
    @Public
    @Stable
    public abstract void setTrackingUrl(String url);

}