| /** |
| * 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.util; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| |
| import org.apache.commons.codec.binary.Base64; |
| |
| |
| public class AuxiliaryServiceHelper { |
| |
| public final static String NM_AUX_SERVICE = "NM_AUX_SERVICE_"; |
| |
| public static ByteBuffer getServiceDataFromEnv(String serviceName, |
| Map<String, String> env) { |
| String meta = env.get(getPrefixServiceName(serviceName)); |
| if (null == meta) { |
| return null; |
| } |
| byte[] metaData = Base64.decodeBase64(meta); |
| return ByteBuffer.wrap(metaData); |
| } |
| |
| public static void setServiceDataIntoEnv(String serviceName, |
| ByteBuffer metaData, Map<String, String> env) { |
| byte[] byteData = metaData.array(); |
| env.put(getPrefixServiceName(serviceName), |
| Base64.encodeBase64String(byteData)); |
| } |
| |
| private static String getPrefixServiceName(String serviceName) { |
| return NM_AUX_SERVICE + serviceName; |
| } |
| } |