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#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.Threading;
using System.Threading.Tasks;
using Grpc.Core.Internal;
namespace Grpc.Core
{
// NOTE: this class is work-in-progress
/// <summary>
/// Helper methods for generated stubs to make RPC calls.
/// </summary>
public static class Calls
{
public static TResponse BlockingUnaryCall<TRequest, TResponse>(Call<TRequest, TResponse> call, TRequest req, CancellationToken token)
{
var asyncCall = new AsyncCall<TRequest, TResponse>(call.RequestSerializer, call.ResponseDeserializer);
return asyncCall.UnaryCall(call.Channel, call.MethodName, req);
//TODO: implement this in real synchronous style.
// try {
// return AsyncUnaryCall(call, req, token).Result;
// } catch(AggregateException ae) {
// foreach (var e in ae.InnerExceptions)
// {
// if (e is RpcException)
// {
// throw e;
// }
// }
// throw;
// }
}
public static async Task<TResponse> AsyncUnaryCall<TRequest, TResponse>(Call<TRequest, TResponse> call, TRequest req, CancellationToken token)
{
var asyncCall = new AsyncCall<TRequest, TResponse>(call.RequestSerializer, call.ResponseDeserializer);
asyncCall.Initialize(call.Channel, GetCompletionQueue(), call.MethodName);
return await asyncCall.UnaryCallAsync(req);
}
public static void AsyncServerStreamingCall<TRequest, TResponse>(Call<TRequest, TResponse> call, TRequest req, IObserver<TResponse> outputs, CancellationToken token)
{
var asyncCall = new AsyncCall<TRequest, TResponse>(call.RequestSerializer, call.ResponseDeserializer);
asyncCall.Initialize(call.Channel, GetCompletionQueue(), call.MethodName);
asyncCall.StartServerStreamingCall(req, outputs);
}
public static ClientStreamingAsyncResult<TRequest, TResponse> AsyncClientStreamingCall<TRequest, TResponse>(Call<TRequest, TResponse> call, CancellationToken token)
{
var asyncCall = new AsyncCall<TRequest, TResponse>(call.RequestSerializer, call.ResponseDeserializer);
asyncCall.Initialize(call.Channel, GetCompletionQueue(), call.MethodName);
var task = asyncCall.ClientStreamingCallAsync();
var inputs = new ClientStreamingInputObserver<TRequest, TResponse>(asyncCall);
return new ClientStreamingAsyncResult<TRequest, TResponse>(task, inputs);
}
public static TResponse BlockingClientStreamingCall<TRequest, TResponse>(Call<TRequest, TResponse> call, IObservable<TRequest> inputs, CancellationToken token)
{
throw new NotImplementedException();
}
public static IObserver<TRequest> DuplexStreamingCall<TRequest, TResponse>(Call<TRequest, TResponse> call, IObserver<TResponse> outputs, CancellationToken token)
{
var asyncCall = new AsyncCall<TRequest, TResponse>(call.RequestSerializer, call.ResponseDeserializer);
asyncCall.Initialize(call.Channel, GetCompletionQueue(), call.MethodName);
asyncCall.StartDuplexStreamingCall(outputs);
return new ClientStreamingInputObserver<TRequest, TResponse>(asyncCall);
}
private static CompletionQueueSafeHandle GetCompletionQueue() {
return GrpcEnvironment.ThreadPool.CompletionQueue;
}
}
}
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