| /** |
| * 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 |
| * |
| * https://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 Avro.IO; |
| |
| namespace Avro.ipc |
| { |
| public class CallFuture<T> : ICallback<T>, IDisposable |
| { |
| private readonly ICallback<T> chainedCallback; |
| private CountdownLatch latch = new CountdownLatch(1); |
| |
| public CallFuture(ICallback<T> chainedCallback = null) |
| { |
| this.chainedCallback = chainedCallback; |
| } |
| |
| public T Result { get; private set; } |
| public Exception Error { get; private set; } |
| |
| public bool IsDone |
| { |
| get { return latch.CurrentCount == 0; } |
| } |
| |
| public virtual void HandleResult(T result) |
| { |
| Result = result; |
| latch.Signal(); |
| if (chainedCallback != null) |
| { |
| chainedCallback.HandleResult(result); |
| } |
| } |
| |
| public virtual void HandleException(Exception exception) |
| { |
| Error = exception; |
| latch.Signal(); |
| if (chainedCallback != null) |
| { |
| chainedCallback.HandleException(exception); |
| } |
| } |
| |
| public T WaitForResult() |
| { |
| latch.Wait(); |
| if (Error != null) |
| { |
| throw Error; |
| } |
| return Result; |
| } |
| |
| public T WaitForResult(int millisecondsTimeout) |
| { |
| if (latch.Wait(millisecondsTimeout)) |
| { |
| if (Error != null) |
| { |
| throw Error; |
| } |
| return Result; |
| } |
| |
| throw new TimeoutException(); |
| } |
| |
| public void Wait() |
| { |
| latch.Wait(); |
| } |
| |
| public void Wait(int millisecondsTimeout) |
| { |
| if (!latch.Wait(millisecondsTimeout)) |
| { |
| throw new TimeoutException(); |
| } |
| } |
| |
| public void Dispose() |
| { |
| Dispose(true); |
| GC.SuppressFinalize(this); |
| } |
| |
| ~CallFuture() |
| { |
| // Finalizer calls Dispose(false) |
| Dispose(false); |
| } |
| |
| protected virtual void Dispose(bool disposing) |
| { |
| if (disposing) |
| { |
| // free managed resources |
| if (latch != null) |
| { |
| latch.Dispose(); |
| latch = null; |
| } |
| } |
| } |
| } |
| } |