ServerRunners.cs

#region Copyright notice and license

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#endregion

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using Google.Protobuf;
using Grpc.Core;
using Grpc.Core.Logging;
using Grpc.Core.Utils;
using NUnit.Framework;
using Grpc.Testing;

namespace Grpc.IntegrationTesting
{
    /// <summary>
    /// Helper methods to start server runners for performance testing.
    /// </summary>
    public class ServerRunners
    {
        static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<ServerRunners>();

        /// <summary>
        /// Creates a started server runner.
        /// </summary>
        public static IServerRunner CreateStarted(ServerConfig config)
        {
            Logger.Debug("ServerConfig: {0}", config);
            GrpcPreconditions.CheckArgument(config.ServerType == ServerType.ASYNC_SERVER, "Only ASYNC_SERVER supported for C# QpsWorker");
            var credentials = config.SecurityParams != null ? TestCredentials.CreateSslServerCredentials() : ServerCredentials.Insecure;

            if (config.AsyncServerThreads != 0)
            {
                Logger.Warning("ServerConfig.AsyncServerThreads is not supported for C#. Ignoring the value");
            }
            if (config.CoreLimit != 0)
            {
                Logger.Warning("ServerConfig.CoreLimit is not supported for C#. Ignoring the value");
            }
            if (config.CoreList.Count > 0)
            {
                Logger.Warning("ServerConfig.CoreList is not supported for C#. Ignoring the value");
            }

            GrpcPreconditions.CheckArgument(config.PayloadConfig == null,
                "ServerConfig.PayloadConfig shouldn't be set for BenchmarkService based server.");
            var server = new Server
            {
                Services = { BenchmarkService.BindService(new BenchmarkServiceImpl()) },
                Ports = { new ServerPort("[::]", config.Port, credentials) }
            };

            server.Start();
            return new ServerRunnerImpl(server);
        }
    }

    /// <summary>
    /// Server runner.
    /// </summary>
    public class ServerRunnerImpl : IServerRunner
    {
        readonly Server server;
        readonly WallClockStopwatch wallClockStopwatch = new WallClockStopwatch();

        public ServerRunnerImpl(Server server)
        {
            this.server = GrpcPreconditions.CheckNotNull(server);
        }

        public int BoundPort
        {
            get
            {
                return server.Ports.Single().BoundPort;
            }
        }

        /// <summary>
        /// Gets server stats.
        /// </summary>
        /// <returns>The stats.</returns>
        public ServerStats GetStats(bool reset)
        {
            var secondsElapsed = wallClockStopwatch.GetElapsedSnapshot(reset).TotalSeconds;

            // TODO: populate user time and system time
            return new ServerStats
            {
                TimeElapsed = secondsElapsed,
                TimeUser = 0,
                TimeSystem = 0
            };
        }

        /// <summary>
        /// Asynchronously stops the server.
        /// </summary>
        /// <returns>Task that finishes when server has shutdown.</returns>
        public Task StopAsync()
        {
            return server.ShutdownAsync();
        }
    }
        
}