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#region Copyright notice and license
// Copyright 2018 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;
using Grpc.Core.Utils;
namespace Grpc.Core.Interceptors
{
/// <summary>
/// Decorates an underlying <see cref="Grpc.Core.CallInvoker" /> to
/// intercept calls through a given interceptor.
/// </summary>
internal class InterceptingCallInvoker : CallInvoker
{
readonly CallInvoker invoker;
readonly Interceptor interceptor;
/// <summary>
/// Creates a new instance of <see cref="Grpc.Core.Interceptors.InterceptingCallInvoker" />
/// with the given underlying invoker and interceptor instances.
/// </summary>
public InterceptingCallInvoker(CallInvoker invoker, Interceptor interceptor)
{
this.invoker = GrpcPreconditions.CheckNotNull(invoker, nameof(invoker));
this.interceptor = GrpcPreconditions.CheckNotNull(interceptor, nameof(interceptor));
}
/// <summary>
/// Intercepts a simple blocking call with the registered interceptor.
/// </summary>
public override TResponse BlockingUnaryCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
return interceptor.BlockingUnaryCall(
request,
new ClientInterceptorContext<TRequest, TResponse>(method, host, options),
(req, ctx) => invoker.BlockingUnaryCall(ctx.Method, ctx.Host, ctx.Options, req));
}
/// <summary>
/// Intercepts a simple asynchronous call with the registered interceptor.
/// </summary>
public override AsyncUnaryCall<TResponse> AsyncUnaryCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
return interceptor.AsyncUnaryCall(
request,
new ClientInterceptorContext<TRequest, TResponse>(method, host, options),
(req, ctx) => invoker.AsyncUnaryCall(ctx.Method, ctx.Host, ctx.Options, req));
}
/// <summary>
/// Intercepts an asynchronous server streaming call with the registered interceptor.
/// </summary>
public override AsyncServerStreamingCall<TResponse> AsyncServerStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options, TRequest request)
{
return interceptor.AsyncServerStreamingCall(
request,
new ClientInterceptorContext<TRequest, TResponse>(method, host, options),
(req, ctx) => invoker.AsyncServerStreamingCall(ctx.Method, ctx.Host, ctx.Options, req));
}
/// <summary>
/// Intercepts an asynchronous client streaming call with the registered interceptor.
/// </summary>
public override AsyncClientStreamingCall<TRequest, TResponse> AsyncClientStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options)
{
return interceptor.AsyncClientStreamingCall(
new ClientInterceptorContext<TRequest, TResponse>(method, host, options),
ctx => invoker.AsyncClientStreamingCall(ctx.Method, ctx.Host, ctx.Options));
}
/// <summary>
/// Intercepts an asynchronous duplex streaming call with the registered interceptor.
/// </summary>
public override AsyncDuplexStreamingCall<TRequest, TResponse> AsyncDuplexStreamingCall<TRequest, TResponse>(Method<TRequest, TResponse> method, string host, CallOptions options)
{
return interceptor.AsyncDuplexStreamingCall(
new ClientInterceptorContext<TRequest, TResponse>(method, host, options),
ctx => invoker.AsyncDuplexStreamingCall(ctx.Method, ctx.Host, ctx.Options));
}
}
}
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