| // 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.Generic; |
| |
| namespace Org.Apache.REEF.Bridge.Core.Common.Driver |
| { |
| internal sealed class DispatchEventHandler<T> : IObserver<T>, IObservable<T> |
| { |
| private readonly ISet<IObserver<T>> _userHandlers; |
| |
| public DispatchEventHandler() |
| { |
| _userHandlers = new HashSet<IObserver<T>>(); |
| } |
| |
| public DispatchEventHandler(ISet<IObserver<T>> userHandlers) |
| { |
| _userHandlers = userHandlers; |
| } |
| |
| public void OnNext(T value) |
| { |
| foreach (var observer in _userHandlers) |
| { |
| observer.OnNext(value); |
| } |
| } |
| |
| public void OnError(Exception error) |
| { |
| throw new NotImplementedException(); |
| } |
| |
| public void OnCompleted() |
| { |
| throw new NotImplementedException(); |
| } |
| |
| public IDisposable Subscribe(IObserver<T> observer) |
| { |
| _userHandlers.Add(observer); |
| return new DisposeImpl() |
| { |
| DispatchEventHandler = this, |
| Handler = observer |
| }; |
| } |
| |
| private class DisposeImpl : IDisposable |
| { |
| public DispatchEventHandler<T> DispatchEventHandler { private get; set; } |
| public IObserver<T> Handler { private get; set; } |
| |
| public void Dispose() |
| { |
| DispatchEventHandler._userHandlers.Remove(Handler); |
| } |
| } |
| } |
| } |