| #region Copyright notice and license |
| |
| // Copyright 2015 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 NUnit.Framework; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| namespace Grpc.Core.Tests |
| { |
| public class ThreadingModelTest |
| { |
| const string Host = "127.0.0.1"; |
| |
| MockServiceHelper helper; |
| Server server; |
| Channel channel; |
| |
| [SetUp] |
| public void Init() |
| { |
| helper = new MockServiceHelper(Host); |
| server = helper.GetServer(); |
| server.Start(); |
| channel = helper.GetChannel(); |
| } |
| |
| [TearDown] |
| public void Cleanup() |
| { |
| channel.ShutdownAsync().Wait(); |
| server.ShutdownAsync().Wait(); |
| } |
| |
| [Test] |
| public void BlockingCallInServerHandlerDoesNotDeadlock() |
| { |
| helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) => |
| { |
| int recursionDepth = int.Parse(request); |
| if (recursionDepth <= 0) { |
| return Task.FromResult("SUCCESS"); |
| } |
| var response = Calls.BlockingUnaryCall(helper.CreateUnaryCall(), (recursionDepth - 1).ToString()); |
| return Task.FromResult(response); |
| }); |
| |
| int maxRecursionDepth = Environment.ProcessorCount * 2; // make sure we have more pending blocking calls than threads in GrpcThreadPool |
| Assert.AreEqual("SUCCESS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), maxRecursionDepth.ToString())); |
| } |
| |
| [Test] |
| public void HandlerDoesNotRunOnGrpcThread() |
| { |
| helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) => |
| { |
| if (IsRunningOnGrpcThreadPool()) { |
| return Task.FromResult("Server handler should not run on gRPC threadpool thread."); |
| } |
| return Task.FromResult(request); |
| }); |
| |
| Assert.AreEqual("ABC", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "ABC")); |
| } |
| |
| [Test] |
| public async Task ContinuationDoesNotRunOnGrpcThread() |
| { |
| helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) => |
| { |
| return Task.FromResult(request); |
| }); |
| |
| await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "ABC"); |
| Assert.IsFalse(IsRunningOnGrpcThreadPool()); |
| } |
| |
| private static bool IsRunningOnGrpcThreadPool() |
| { |
| var threadName = Thread.CurrentThread.Name ?? ""; |
| return threadName.Contains("grpc"); |
| } |
| } |
| } |