001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.yarn.applications.distributedshell;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.classification.InterfaceStability;
023    
024    /**
025     * Constants used in both Client and Application Master
026     */
027    @InterfaceAudience.Public
028    @InterfaceStability.Unstable
029    public class DSConstants {
030    
031      /**
032       * Environment key name pointing to the shell script's location
033       */
034      public static final String DISTRIBUTEDSHELLSCRIPTLOCATION = "DISTRIBUTEDSHELLSCRIPTLOCATION";
035    
036      /**
037       * Environment key name denoting the file timestamp for the shell script. 
038       * Used to validate the local resource. 
039       */
040      public static final String DISTRIBUTEDSHELLSCRIPTTIMESTAMP = "DISTRIBUTEDSHELLSCRIPTTIMESTAMP";
041    
042      /**
043       * Environment key name denoting the file content length for the shell script. 
044       * Used to validate the local resource. 
045       */
046      public static final String DISTRIBUTEDSHELLSCRIPTLEN = "DISTRIBUTEDSHELLSCRIPTLEN";
047    }