src/csharp/Grpc.Examples/MathGrpc.cs

#region Copyright notice and license

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#endregion

using System;
using System.Collections.Generic;
using System.Reactive.Linq;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core;

namespace math
{
    /// <summary>
    /// Math service definitions (this is handwritten version of code that will normally be generated).
    /// </summary>
    public class MathGrpc
    {
        static readonly string ServiceName = "/math.Math";

        static readonly Marshaller<DivArgs> DivArgsMarshaller = Marshallers.Create((arg) => arg.ToByteArray(), DivArgs.ParseFrom);
        static readonly Marshaller<DivReply> DivReplyMarshaller = Marshallers.Create((arg) => arg.ToByteArray(), DivReply.ParseFrom);
        static readonly Marshaller<Num> NumMarshaller = Marshallers.Create((arg) => arg.ToByteArray(), Num.ParseFrom);
        static readonly Marshaller<FibArgs> FibArgsMarshaller = Marshallers.Create((arg) => arg.ToByteArray(), FibArgs.ParseFrom);

        static readonly Method<DivArgs, DivReply> DivMethod = new Method<DivArgs, DivReply>(
            MethodType.Unary,
            "Div",
            DivArgsMarshaller,
            DivReplyMarshaller);

        static readonly Method<FibArgs, Num> FibMethod = new Method<FibArgs, Num>(
            MethodType.ServerStreaming,
            "Fib",
            FibArgsMarshaller,
            NumMarshaller);

        static readonly Method<Num, Num> SumMethod = new Method<Num, Num>(
            MethodType.ClientStreaming,
            "Sum",
            NumMarshaller,
            NumMarshaller);

        static readonly Method<DivArgs, DivReply> DivManyMethod = new Method<DivArgs, DivReply>(
            MethodType.DuplexStreaming,
            "DivMany",
            DivArgsMarshaller,
            DivReplyMarshaller);

        public interface IMathServiceClient
        {
            DivReply Div(DivArgs request, CancellationToken token = default(CancellationToken));

            Task<DivReply> DivAsync(DivArgs request, CancellationToken token = default(CancellationToken));

            void Fib(FibArgs request, IObserver<Num> responseObserver, CancellationToken token = default(CancellationToken));

            ClientStreamingAsyncResult<Num, Num> Sum(CancellationToken token = default(CancellationToken));

            IObserver<DivArgs> DivMany(IObserver<DivReply> responseObserver, CancellationToken token = default(CancellationToken));
        }

        public class MathServiceClientStub : AbstractStub<MathServiceClientStub, StubConfiguration>, IMathServiceClient
        {
            public MathServiceClientStub(Channel channel) : this(channel, StubConfiguration.Default)
            {
            }

            public MathServiceClientStub(Channel channel, StubConfiguration config) : base(channel, config)
            {
            }

            public DivReply Div(DivArgs request, CancellationToken token = default(CancellationToken))
            {
                var call = CreateCall(ServiceName, DivMethod);
                return Calls.BlockingUnaryCall(call, request, token);
            }

            public Task<DivReply> DivAsync(DivArgs request, CancellationToken token = default(CancellationToken))
            {
                var call = CreateCall(ServiceName, DivMethod);
                return Calls.AsyncUnaryCall(call, request, token);
            }

            public void Fib(FibArgs request, IObserver<Num> responseObserver, CancellationToken token = default(CancellationToken))
            {
                var call = CreateCall(ServiceName, FibMethod);
                Calls.AsyncServerStreamingCall(call, request, responseObserver, token);
            }

            public ClientStreamingAsyncResult<Num, Num> Sum(CancellationToken token = default(CancellationToken))
            {
                var call = CreateCall(ServiceName, SumMethod);
                return Calls.AsyncClientStreamingCall(call, token);
            }

            public IObserver<DivArgs> DivMany(IObserver<DivReply> responseObserver, CancellationToken token = default(CancellationToken))
            {
                var call = CreateCall(ServiceName, DivManyMethod);
                return Calls.DuplexStreamingCall(call, responseObserver, token);
            }
        }

        // server-side interface
        public interface IMathService
        {
            void Div(DivArgs request, IObserver<DivReply> responseObserver);

            void Fib(FibArgs request, IObserver<Num> responseObserver);

            IObserver<Num> Sum(IObserver<Num> responseObserver);

            IObserver<DivArgs> DivMany(IObserver<DivReply> responseObserver);
        }

        public static ServerServiceDefinition BindService(IMathService serviceImpl)
        {
            return ServerServiceDefinition.CreateBuilder(ServiceName)
                .AddMethod(DivMethod, serviceImpl.Div)
                .AddMethod(FibMethod, serviceImpl.Fib)
                .AddMethod(SumMethod, serviceImpl.Sum)
                .AddMethod(DivManyMethod, serviceImpl.DivMany).Build();
        }

        public static IMathServiceClient NewStub(Channel channel)
        {
            return new MathServiceClientStub(channel);
        }

        public static IMathServiceClient NewStub(Channel channel, StubConfiguration config)
        {
            return new MathServiceClientStub(channel, config);
        }
    }
}