hadoop ServiceApiConstants 源码

2022-10-20
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haddop ServiceApiConstants 代码

文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/api/ServiceApiConstants.java

/*
 * 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.service.api;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

import static org.apache.hadoop.yarn.service.utils.ServiceApiUtil.$;

/**
 * This class defines constants that can be used in input spec for
 * variable substitutions
 */
@InterfaceAudience.Public
@InterfaceStability.Unstable
public interface ServiceApiConstants {

  // Constants for service
  String SERVICE_NAME = $("SERVICE_NAME");

  String SERVICE_NAME_LC = $("SERVICE_NAME.lc");

  String USER = $("USER");

  String DOMAIN = $("DOMAIN");

  // Constants for component
  String COMPONENT_NAME = $("COMPONENT_NAME");

  String COMPONENT_NAME_LC = $("COMPONENT_NAME.lc");

  String COMPONENT_INSTANCE_NAME = $("COMPONENT_INSTANCE_NAME");

  // Constants for component instance
  String COMPONENT_ID = $("COMPONENT_ID");

  String CONTAINER_ID = $("CONTAINER_ID");

  // Templates for component instance host/IP
  String COMPONENT_INSTANCE_HOST = $("%s_HOST");

  String COMPONENT_INSTANCE_IP = $("%s_IP");

  // Constants for default cluster ZK
  String CLUSTER_ZK_QUORUM = $("CLUSTER_ZK_QUORUM");

  // URI for the default cluster fs
  String CLUSTER_FS_URI = $("CLUSTER_FS_URI");

  // the host component of the cluster fs UI
  String CLUSTER_FS_HOST = $("CLUSTER_FS_HOST");

  // Path in zookeeper for a specific service
  String SERVICE_ZK_PATH = $("SERVICE_ZK_PATH");

  // Constants for service specific hdfs dir
  String SERVICE_HDFS_DIR = $("SERVICE_HDFS_DIR");
}

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