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#region Copyright notice and license
// Copyright 2015-2016 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System.Threading.Tasks;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
namespace Grpc.Core
{
/// <summary>
/// Invokes client RPCs using <see cref="Calls"/>.
/// </summary>
public class DefaultCallInvoker : CallInvoker
{
readonly Channel channel;
/// <summary>
/// Initializes a new instance of the <see cref="Grpc.Core.DefaultCallInvoker"/> class.
/// </summary>
/// <param name="channel">Channel to use.</param>
public DefaultCallInvoker(Channel channel)
{
this.channel = GrpcPreconditions.CheckNotNull(channel);
}
/// <summary>
/// Invokes a simple remote call in a blocking fashion.
/// </summary>
public override TResponse BlockingUnaryCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
var call = CreateCall(method, host, options);
return Calls.BlockingUnaryCall(call, request);
}
/// <summary>
/// Invokes a simple remote call asynchronously.
/// </summary>
public override AsyncUnaryCall<TResponse> AsyncUnaryCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
var call = CreateCall(method, host, options);
return Calls.AsyncUnaryCall(call, request);
}
/// <summary>
/// Invokes a server streaming call asynchronously.
/// In server streaming scenario, client sends on request and server responds with a stream of responses.
/// </summary>
public override AsyncServerStreamingCall<TResponse> AsyncServerStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
var call = CreateCall(method, host, options);
return Calls.AsyncServerStreamingCall(call, request);
}
/// <summary>
/// Invokes a client streaming call asynchronously.
/// In client streaming scenario, client sends a stream of requests and server responds with a single response.
/// </summary>
public override AsyncClientStreamingCall<TRequest, TResponse> AsyncClientStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options)
{
var call = CreateCall(method, host, options);
return Calls.AsyncClientStreamingCall(call);
}
/// <summary>
/// Invokes a duplex streaming call asynchronously.
/// In duplex streaming scenario, client sends a stream of requests and server responds with a stream of responses.
/// The response stream is completely independent and both side can be sending messages at the same time.
/// </summary>
public override AsyncDuplexStreamingCall<TRequest, TResponse> AsyncDuplexStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options)
{
var call = CreateCall(method, host, options);
return Calls.AsyncDuplexStreamingCall(call);
}
/// <summary>Creates call invocation details for given method.</summary>
protected virtual CallInvocationDetails<TRequest, TResponse> CreateCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options)
where TRequest : class
where TResponse : class
{
return new CallInvocationDetails<TRequest, TResponse>(channel, method, host, options);
}
}
}
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