TestServiceImpl.cs

#region Copyright notice and license

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//
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#endregion

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Google.ProtocolBuffers;
using Grpc.Core;
using Grpc.Core.Utils;

namespace grpc.testing
{
    /// <summary>
    /// Implementation of TestService server
    /// </summary>
    public class TestServiceImpl : TestService.ITestService
    {
        public Task<Empty> EmptyCall(Empty request, ServerCallContext context)
        {
            return Task.FromResult(Empty.DefaultInstance);
        }

        public Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
        {
            var response = SimpleResponse.CreateBuilder()
                .SetPayload(CreateZerosPayload(request.ResponseSize)).Build();
            return Task.FromResult(response);
        }

        public async Task StreamingOutputCall(StreamingOutputCallRequest request, IServerStreamWriter<StreamingOutputCallResponse> responseStream, ServerCallContext context)
        {
            foreach (var responseParam in request.ResponseParametersList)
            {
                var response = StreamingOutputCallResponse.CreateBuilder()
                    .SetPayload(CreateZerosPayload(responseParam.Size)).Build();
                await responseStream.WriteAsync(response);
            }
        }

        public async Task<StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<StreamingInputCallRequest> requestStream, ServerCallContext context)
        {
            int sum = 0;
            await requestStream.ForEachAsync(async request =>
            {
                sum += request.Payload.Body.Length;
            });
            return StreamingInputCallResponse.CreateBuilder().SetAggregatedPayloadSize(sum).Build();
        }

        public async Task FullDuplexCall(IAsyncStreamReader<StreamingOutputCallRequest> requestStream, IServerStreamWriter<StreamingOutputCallResponse> responseStream, ServerCallContext context)
        {
            await requestStream.ForEachAsync(async request =>
            {
                foreach (var responseParam in request.ResponseParametersList)
                {
                    var response = StreamingOutputCallResponse.CreateBuilder()
                        .SetPayload(CreateZerosPayload(responseParam.Size)).Build();
                    await responseStream.WriteAsync(response);
                }
            });
        }

        public async Task HalfDuplexCall(IAsyncStreamReader<StreamingOutputCallRequest> requestStream, IServerStreamWriter<StreamingOutputCallResponse> responseStream, ServerCallContext context)
        {
            throw new NotImplementedException();
        }

        private static Payload CreateZerosPayload(int size)
        {
            return Payload.CreateBuilder().SetBody(ByteString.CopyFrom(new byte[size])).Build();
        }
    }
}