| // 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 Microsoft.Practices.TransientFaultHandling; |
| using Org.Apache.REEF.Tang.Annotations; |
| using Org.Apache.REEF.Utilities.Logging; |
| using Org.Apache.REEF.Wake.Remote.Parameters; |
| |
| namespace Org.Apache.REEF.Wake.Remote.Impl |
| { |
| /// <summary> |
| /// Handles the retry logic to connect to remote endpoint |
| /// </summary> |
| internal sealed class RemoteConnectionRetryHandler : IConnectionRetryHandler |
| { |
| private static readonly Logger Logger = Logger.GetLogger(typeof(RemoteConnectionRetryHandler)); |
| private readonly RetryPolicy<AllErrorsTransientStrategy> _retryPolicy; |
| |
| /// <summary> |
| /// Constructor |
| /// </summary> |
| /// <param name="retryCount">Number of times to retry connection</param> |
| /// <param name="timeIntervalInMs">Time interval between retries in milli seconds</param> |
| [Inject] |
| internal RemoteConnectionRetryHandler([Parameter(typeof(ConnectionRetryCount))] int retryCount, |
| [Parameter(typeof(SleepTimeInMs))] int timeIntervalInMs) |
| { |
| var timeIntervalInMs1 = TimeSpan.FromMilliseconds(timeIntervalInMs); |
| _retryPolicy = new RetryPolicy<AllErrorsTransientStrategy>( |
| new FixedInterval("ConnectionRetries", retryCount, timeIntervalInMs1, true)); |
| _retryPolicy.Retrying += (sender, args) => |
| { |
| // Log details of the retry. |
| var msg = string.Format("Retry - Count:{0}, Delay:{1}, Exception:{2}", |
| args.CurrentRetryCount, |
| args.Delay, |
| args.LastException); |
| Logger.Log(Level.Info, msg); |
| }; |
| } |
| |
| /// <summary> |
| /// Retry policy for the connection |
| /// </summary> |
| public RetryPolicy Policy |
| { |
| get |
| { |
| return _retryPolicy; |
| } |
| } |
| } |
| |
| internal class AllErrorsTransientStrategy : ITransientErrorDetectionStrategy |
| { |
| public bool IsTransient(Exception ex) |
| { |
| return true; |
| } |
| } |
| } |