| // 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.Collections; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| 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 |
| { |
| public sealed class TcpPortProvider : ITcpPortProvider |
| { |
| private readonly int _tcpPortRangeStart; |
| private readonly int _tcpPortRangeCount; |
| private readonly int _tcpPortRangeTryCount; |
| private readonly int _tcpPortRangeSeed; |
| |
| [Inject] |
| private TcpPortProvider( |
| [Parameter(typeof(TcpPortRangeStart))] int tcpPortRangeStart, |
| [Parameter(typeof(TcpPortRangeCount))] int tcpPortRangeCount, |
| [Parameter(typeof(TcpPortRangeTryCount))] int tcpPortRangeTryCount, |
| [Parameter(typeof(TcpPortRangeSeed))] int tcpPortRangeSeed) |
| { |
| _tcpPortRangeStart = tcpPortRangeStart; |
| _tcpPortRangeCount = tcpPortRangeCount; |
| _tcpPortRangeTryCount = tcpPortRangeTryCount; |
| _tcpPortRangeSeed = tcpPortRangeSeed; |
| } |
| |
| IEnumerator<int> IEnumerable<int>.GetEnumerator() |
| { |
| return new TcpPortEnumerator(_tcpPortRangeStart, _tcpPortRangeCount, _tcpPortRangeTryCount, |
| _tcpPortRangeSeed); |
| } |
| |
| IEnumerator IEnumerable.GetEnumerator() |
| { |
| return new TcpPortEnumerator(_tcpPortRangeStart, _tcpPortRangeCount, _tcpPortRangeTryCount, |
| _tcpPortRangeSeed); |
| } |
| |
| private class TcpPortEnumerator : IEnumerator<int> |
| { |
| private readonly int _seed; |
| private Random _random; |
| private readonly int _tcpPortRangeStart; |
| private readonly int _tcpPortRangeCount; |
| private readonly int _tcpPortRangeTryCount; |
| private int _tcpPortRangeAttempt; |
| |
| internal TcpPortEnumerator( |
| int tcpPortRangeStart, |
| int tcpPortRangeCount, |
| int tcpPortRangeTryCount, |
| int tcpPortRangeSeed) |
| { |
| _tcpPortRangeStart = tcpPortRangeStart; |
| _tcpPortRangeCount = tcpPortRangeCount; |
| _tcpPortRangeTryCount = tcpPortRangeTryCount; |
| _tcpPortRangeAttempt = 0; |
| _seed = tcpPortRangeSeed; |
| _random = new Random(_seed); |
| } |
| |
| int IEnumerator<int>.Current |
| { |
| get { return _random.Next(_tcpPortRangeCount - 1) + 1 + _tcpPortRangeStart; } |
| } |
| |
| void IDisposable.Dispose() |
| { |
| } |
| |
| object IEnumerator.Current |
| { |
| get { return _random.Next(_tcpPortRangeCount - 1) + 1 + _tcpPortRangeStart; } |
| } |
| |
| bool IEnumerator.MoveNext() |
| { |
| return _tcpPortRangeAttempt++ < _tcpPortRangeTryCount; |
| } |
| |
| void IEnumerator.Reset() |
| { |
| _random = new Random(_seed); |
| } |
| } |
| } |
| } |