﻿// 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 System.Threading;
using Org.Apache.REEF.Common.Tasks;
using Org.Apache.REEF.Common.Tasks.Events;
using Org.Apache.REEF.Tang.Annotations;
using Org.Apache.REEF.Utilities.Logging;

namespace Org.Apache.REEF.Tests.Functional.Failure
{
    internal sealed class SleepTask : ITask, IObserver<ICloseEvent>
    {
        private static readonly Logger Logger = Logger.GetLogger(typeof(SleepTask));
        private const string Prefix = "Poison: ";

        [Inject]
        private SleepTask()
        {
        }

        public void Dispose()
        {
        }

        public byte[] Call(byte[] memento)
        {
            Logger.Log(Level.Info, Prefix + "Will sleep for 4 seconds (expecting to be poisoned faster).");
            Thread.Sleep(4000);
            Logger.Log(Level.Info, Prefix + "Task sleep finished successfully.");
            return null;
        }

        public void OnNext(ICloseEvent value)
        {
            // handler for forceful shutdown in case of evaluator failure
            // (to prevent throwing TaskCloseHandlerNotBoundException)
            Logger.Log(Level.Info, Prefix + "Task stopped");
        }

        public void OnCompleted()
        {
            throw new NotImplementedException();
        }

        public void OnError(Exception error)
        {
            throw new NotImplementedException();
        }
    }
}