| #region Copyright notice and license |
| |
| // Copyright 2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #endregion |
| |
| using System; |
| using System.Runtime.CompilerServices; |
| using System.Threading.Tasks; |
| |
| namespace Grpc.Core |
| { |
| /// <summary> |
| /// Return type for client streaming calls. |
| /// </summary> |
| /// <typeparam name="TRequest">Request message type for this call.</typeparam> |
| /// <typeparam name="TResponse">Response message type for this call.</typeparam> |
| public sealed class AsyncClientStreamingCall<TRequest, TResponse> : IDisposable |
| { |
| readonly IClientStreamWriter<TRequest> requestStream; |
| readonly Task<TResponse> responseAsync; |
| readonly Task<Metadata> responseHeadersAsync; |
| readonly Func<Status> getStatusFunc; |
| readonly Func<Metadata> getTrailersFunc; |
| readonly Action disposeAction; |
| |
| internal AsyncClientStreamingCall(IClientStreamWriter<TRequest> requestStream, Task<TResponse> responseAsync, Task<Metadata> responseHeadersAsync, Func<Status> getStatusFunc, Func<Metadata> getTrailersFunc, Action disposeAction) |
| { |
| this.requestStream = requestStream; |
| this.responseAsync = responseAsync; |
| this.responseHeadersAsync = responseHeadersAsync; |
| this.getStatusFunc = getStatusFunc; |
| this.getTrailersFunc = getTrailersFunc; |
| this.disposeAction = disposeAction; |
| } |
| |
| /// <summary> |
| /// Asynchronous call result. |
| /// </summary> |
| public Task<TResponse> ResponseAsync |
| { |
| get |
| { |
| return this.responseAsync; |
| } |
| } |
| |
| /// <summary> |
| /// Asynchronous access to response headers. |
| /// </summary> |
| public Task<Metadata> ResponseHeadersAsync |
| { |
| get |
| { |
| return this.responseHeadersAsync; |
| } |
| } |
| |
| /// <summary> |
| /// Async stream to send streaming requests. |
| /// </summary> |
| public IClientStreamWriter<TRequest> RequestStream |
| { |
| get |
| { |
| return requestStream; |
| } |
| } |
| |
| /// <summary> |
| /// Allows awaiting this object directly. |
| /// </summary> |
| /// <returns></returns> |
| public TaskAwaiter<TResponse> GetAwaiter() |
| { |
| return responseAsync.GetAwaiter(); |
| } |
| |
| /// <summary> |
| /// Gets the call status if the call has already finished. |
| /// Throws InvalidOperationException otherwise. |
| /// </summary> |
| public Status GetStatus() |
| { |
| return getStatusFunc(); |
| } |
| |
| /// <summary> |
| /// Gets the call trailing metadata if the call has already finished. |
| /// Throws InvalidOperationException otherwise. |
| /// </summary> |
| public Metadata GetTrailers() |
| { |
| return getTrailersFunc(); |
| } |
| |
| /// <summary> |
| /// Provides means to cleanup after the call. |
| /// If the call has already finished normally (request stream has been completed and call result has been received), doesn't do anything. |
| /// Otherwise, requests cancellation of the call which should terminate all pending async operations associated with the call. |
| /// As a result, all resources being used by the call should be released eventually. |
| /// </summary> |
| /// <remarks> |
| /// Normally, there is no need for you to dispose the call unless you want to utilize the |
| /// "Cancel" semantics of invoking <c>Dispose</c>. |
| /// </remarks> |
| public void Dispose() |
| { |
| disposeAction.Invoke(); |
| } |
| } |
| } |