yarn/util/HadoopConfigProvider.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.network.yarn.util;
0019
0020 import java.util.Map;
0021 import java.util.NoSuchElementException;
0022
0023 import org.apache.hadoop.conf.Configuration;
0024
0025 import org.apache.spark.network.util.ConfigProvider;
0026
0027 /** Use the Hadoop configuration to obtain config values. */
0028 public class HadoopConfigProvider extends ConfigProvider {
0029   private final Configuration conf;
0030
0031   public HadoopConfigProvider(Configuration conf) {
0032     this.conf = conf;
0033   }
0034
0035   @Override
0036   public String get(String name) {
0037     String value = conf.get(name);
0038     if (value == null) {
0039       throw new NoSuchElementException(name);
0040     }
0041     return value;
0042   }
0043
0044   @Override
0045   public String get(String name, String defaultValue) {
0046     String value = conf.get(name);
0047     return value == null ? defaultValue : value;
0048   }
0049
0050   @Override
0051   public Iterable<Map.Entry<String, String>> getAll() {
0052     return conf;
0053   }
0054
0055 }