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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 Grpc.Core.Internal;
namespace Grpc.Core
{
internal interface IServerCallHandler
{
void StartCall(string methodName, CallSafeHandle call, CompletionQueueSafeHandle cq);
}
internal class UnaryRequestServerCallHandler<TRequest, TResponse> : IServerCallHandler
{
readonly Method<TRequest, TResponse> method;
readonly UnaryRequestServerMethod<TRequest, TResponse> handler;
public UnaryRequestServerCallHandler(Method<TRequest, TResponse> method, UnaryRequestServerMethod<TRequest, TResponse> handler)
{
this.method = method;
this.handler = handler;
}
public void StartCall(string methodName, CallSafeHandle call, CompletionQueueSafeHandle cq)
{
var asyncCall = new AsyncCall<TResponse, TRequest>(
method.ResponseMarshaller.Serializer,
method.RequestMarshaller.Deserializer);
asyncCall.InitializeServer(call);
var finishedTask = asyncCall.ServerSideUnaryRequestCallAsync();
var request = asyncCall.ReceiveMessageAsync().Result;
var responseObserver = new ServerStreamingOutputObserver<TResponse, TRequest>(asyncCall);
handler(request, responseObserver);
finishedTask.Wait();
}
}
internal class StreamingRequestServerCallHandler<TRequest, TResponse> : IServerCallHandler
{
readonly Method<TRequest, TResponse> method;
readonly StreamingRequestServerMethod<TRequest, TResponse> handler;
public StreamingRequestServerCallHandler(Method<TRequest, TResponse> method, StreamingRequestServerMethod<TRequest, TResponse> handler)
{
this.method = method;
this.handler = handler;
}
public void StartCall(string methodName, CallSafeHandle call, CompletionQueueSafeHandle cq)
{
var asyncCall = new AsyncCall<TResponse, TRequest>(
method.ResponseMarshaller.Serializer,
method.RequestMarshaller.Deserializer);
asyncCall.InitializeServer(call);
var responseObserver = new ServerStreamingOutputObserver<TResponse, TRequest>(asyncCall);
var requestObserver = handler(responseObserver);
var finishedTask = asyncCall.ServerSideStreamingRequestCallAsync(requestObserver);
finishedTask.Wait();
}
}
internal class NoSuchMethodCallHandler : IServerCallHandler
{
public void StartCall(string methodName, CallSafeHandle call, CompletionQueueSafeHandle cq)
{
// We don't care about the payload type here.
AsyncCall<byte[], byte[]> asyncCall = new AsyncCall<byte[], byte[]>(
(payload) => payload, (payload) => payload);
asyncCall.InitializeServer(call);
var finishedTask = asyncCall.ServerSideStreamingRequestCallAsync(new NullObserver<byte[]>());
asyncCall.SendStatusFromServerAsync(new Status(StatusCode.Unimplemented, "No such method.")).Wait();
finishedTask.Wait();
}
}
internal class NullObserver<T> : IObserver<T>
{
public void OnCompleted()
{
}
public void OnError(Exception error)
{
}
public void OnNext(T value)
{
}
}
}
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