| // 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. |
| |
| using System; |
| using Org.Apache.REEF.Tang.Annotations; |
| using Org.Apache.REEF.Utilities; |
| |
| namespace Org.Apache.REEF.Common.Evaluator |
| { |
| public sealed class DefaultYarnClusterHttpDriverConnection : IDriverConnection |
| { |
| private readonly string _applicationId; |
| |
| [Inject] |
| private DefaultYarnClusterHttpDriverConnection() |
| { |
| _applicationId = Environment.GetEnvironmentVariable(Constants.ReefYarnApplicationIdEnvironmentVariable); |
| } |
| |
| public DriverInformation GetDriverInformation() |
| { |
| if (string.IsNullOrWhiteSpace(_applicationId)) |
| { |
| throw new ApplicationException("Could not fetch the application ID from YARN's container environment variables."); |
| } |
| |
| // e.g., http://headnodehost:9014/proxy/application_1407519727821_0012/reef/v1/driver |
| Uri queryUri = new Uri( |
| string.Concat( |
| Constants.HDInsightClusterHttpEndpointBaseUri, |
| _applicationId + "/", |
| Constants.HttpReefUriSpecification, |
| Constants.HttpDriverUriTarget)); |
| return DriverInformation.GetDriverInformationFromHttp(queryUri); |
| } |
| } |
| } |