| // 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.Driver; |
| using Org.Apache.REEF.Driver.Evaluator; |
| using Org.Apache.REEF.Tang.Annotations; |
| using Org.Apache.REEF.Utilities.Logging; |
| |
| namespace Org.Apache.REEF.Examples.AllHandlers |
| { |
| /// <summary> |
| /// A sample implementation of driver start handler |
| /// </summary> |
| public sealed class HelloDriverStartHandler : IObserver<IDriverStarted> |
| { |
| private static readonly Logger Logger = Logger.GetLogger(typeof(HelloDriverStartHandler)); |
| private readonly IEvaluatorRequestor _evaluatorRequestor; |
| |
| [Inject] |
| private HelloDriverStartHandler(IEvaluatorRequestor evaluatorRequestor) |
| { |
| _evaluatorRequestor = evaluatorRequestor; |
| } |
| |
| public void OnError(Exception error) |
| { |
| throw error; |
| } |
| |
| public void OnCompleted() |
| { |
| } |
| |
| /// <summary> |
| /// Called to start the user mode driver |
| /// Sample code to create EvaluatorRequest and submit it |
| /// </summary> |
| /// <param name="driverStarted"></param> |
| public void OnNext(IDriverStarted driverStarted) |
| { |
| Logger.Log(Level.Info, string.Format("HelloDriver started at {0}", driverStarted.StartTime)); |
| |
| int evaluatorsNumber = 1; |
| int memory = 512; |
| int core = 2; |
| string rack = "WonderlandRack"; |
| string evaluatorBatchId = "evaluatorThatRequires512MBofMemory"; |
| var request = |
| _evaluatorRequestor.NewBuilder() |
| .SetNumber(evaluatorsNumber) |
| .SetMegabytes(memory) |
| .SetCores(core) |
| .SetRackName(rack) |
| .SetEvaluatorBatchId(evaluatorBatchId) |
| .Build(); |
| |
| _evaluatorRequestor.Submit(request); |
| |
| evaluatorsNumber = 1; |
| memory = 1999; |
| core = 2; |
| rack = "WonderlandRack"; |
| evaluatorBatchId = "evaluatorThatRequires1999MBofMemory"; |
| request = |
| _evaluatorRequestor.NewBuilder() |
| .SetNumber(evaluatorsNumber) |
| .SetMegabytes(memory) |
| .SetCores(core) |
| .SetRackName(rack) |
| .SetEvaluatorBatchId(evaluatorBatchId) |
| .Build(); |
| _evaluatorRequestor.Submit(request); |
| } |
| } |
| } |