refactor(repeater): stop sending ping event (#180)

Ping historically was there to signal over RMQ that repeater is still
connected
Socket.IO implementation has built in mechanism for disconnection
detection https://socket.io/docs/v4/engine-io-protocol/#heartbeat

src/SecTester.Repeater/Bus/DefaultRepeaterBusFactory.cs

@@ -1,8 +1,6 @@
 using System;
-using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using SecTester.Core;
-using SecTester.Core.Utils;
 using SocketIO.Serializer.MessagePack;
 using SocketIOClient;
 using SocketIOClient.Transport;
@@ -13,13 +11,11 @@ public class DefaultRepeaterBusFactory : IRepeaterBusFactory
 {
   private readonly Configuration _config;
   private readonly ILoggerFactory _loggerFactory;
-  private readonly IServiceScopeFactory _scopeFactory;
 
-  public DefaultRepeaterBusFactory(Configuration config, ILoggerFactory loggerFactory, IServiceScopeFactory scopeFactory)
+  public DefaultRepeaterBusFactory(Configuration config, ILoggerFactory loggerFactory)
   {
     _config = config ?? throw new ArgumentNullException(nameof(config));
     _loggerFactory = loggerFactory ?? throw new ArgumentNullException(nameof(loggerFactory));
-    _scopeFactory = scopeFactory ?? throw new ArgumentNullException(nameof(scopeFactory));
   }
 
   public IRepeaterBus Create(string repeaterId)
@@ -46,9 +42,6 @@ public IRepeaterBus Create(string repeaterId)
     };
     var wrapper = new SocketIoConnection(client);
 
-    var scope = _scopeFactory.CreateAsyncScope();
-    var timerProvider = scope.ServiceProvider.GetRequiredService<ITimerProvider>();
-
-    return new SocketIoRepeaterBus(options, wrapper, timerProvider, _loggerFactory.CreateLogger<IRepeaterBus>());
+    return new SocketIoRepeaterBus(options, wrapper, _loggerFactory.CreateLogger<IRepeaterBus>());
   }
 }

src/SecTester.Repeater/Bus/SocketIoRepeaterBus.cs

@@ -2,26 +2,22 @@
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
-using System.Timers;
 using Microsoft.Extensions.Logging;
-using SecTester.Core.Utils;
 
 namespace SecTester.Repeater.Bus;
 
 internal sealed class SocketIoRepeaterBus : IRepeaterBus
 {
   private static readonly TimeSpan PingInterval = TimeSpan.FromSeconds(10);
 
-  private readonly ITimerProvider _heartbeat;
   private readonly ISocketIoConnection _connection;
   private readonly ILogger<IRepeaterBus> _logger;
   private readonly SocketIoRepeaterBusOptions _options;
 
-  internal SocketIoRepeaterBus(SocketIoRepeaterBusOptions options, ISocketIoConnection connection, ITimerProvider heartbeat, ILogger<IRepeaterBus> logger)
+  internal SocketIoRepeaterBus(SocketIoRepeaterBusOptions options, ISocketIoConnection connection, ILogger<IRepeaterBus> logger)
   {
     _options = options ?? throw new ArgumentNullException(nameof(options));
     _connection = connection ?? throw new ArgumentNullException(nameof(connection));
-    _heartbeat = heartbeat ?? throw new ArgumentNullException(nameof(heartbeat));
     _logger = logger ?? throw new ArgumentNullException(nameof(logger));
   }
 
@@ -37,8 +33,6 @@ public async Task Connect()
 
       await _connection.Connect().ConfigureAwait(false);
 
-      await SchedulePing().ConfigureAwait(false);
-
       _logger.LogDebug("Repeater connected to {BaseUrl}", _options.BaseUrl);
     }
   }
@@ -75,8 +69,6 @@ public async ValueTask DisposeAsync()
   {
     if (_connection is { Connected: true })
     {
-      _heartbeat.Elapsed -= Ping;
-      _heartbeat.Stop();
       await _connection.Disconnect().ConfigureAwait(false);
       _logger.LogDebug("Repeater disconnected from {BaseUrl}", _options.BaseUrl);
     }
@@ -111,22 +103,4 @@ public async Task Deploy(string repeaterId, CancellationToken? cancellationToken
       _connection.Off("deployed");
     }
   }
-
-  private async Task SchedulePing()
-  {
-    await Ping().ConfigureAwait(false);
-    _heartbeat.Interval = PingInterval.TotalMilliseconds;
-    _heartbeat.Elapsed += Ping;
-    _heartbeat.Start();
-  }
-
-  private async void Ping(object sender, ElapsedEventArgs args)
-  {
-    await Ping().ConfigureAwait(false);
-  }
-
-  private async Task Ping()
-  {
-    await _connection.EmitAsync("ping").ConfigureAwait(false);
-  }
 }

src/SecTester.Repeater/Extensions/ServiceCollectionExtensions.cs

@@ -23,7 +23,6 @@ public static IServiceCollection AddSecTesterRepeater(this IServiceCollection co
       .AddSingleton<IRepeaterBusFactory, DefaultRepeaterBusFactory>()
       .AddScoped<IRepeaterFactory, DefaultRepeaterFactory>()
       .AddScoped<IRepeaters, DefaultRepeaters>()
-      .AddScoped<ITimerProvider, SystemTimerProvider>()
       .AddScoped<IRequestRunner, HttpRequestRunner>()
       .AddScoped<RequestRunnerResolver>(sp =>
         protocol => sp.GetServices<IRequestRunner>().FirstOrDefault(x => x.Protocol == protocol)

test/SecTester.Repeater.Tests/Bus/DefaultRepeaterBusFactoryTests.cs

@@ -7,19 +7,9 @@ public class DefaultRepeaterBusFactoryTests : IDisposable
   private const string Token = "0zmcwpe.nexr.0vlon8mp7lvxzjuvgjy88olrhadhiukk";
 
   private readonly ILoggerFactory _loggerFactory = Substitute.For<ILoggerFactory>();
-  private readonly ITimerProvider _timerProvider = Substitute.For<ITimerProvider>();
-  private readonly IServiceScopeFactory _serviceScopeFactory = Substitute.For<IServiceScopeFactory>();
-
-  public DefaultRepeaterBusFactoryTests()
-  {
-    // ADHOC: since GetRequiredService is part of extension we should explicitly mock an instance method
-    _serviceScopeFactory.CreateAsyncScope().ServiceProvider.GetService(typeof(ITimerProvider)).Returns(_timerProvider);
-  }
 
   public void Dispose()
   {
-    _timerProvider.ClearSubstitute();
-    _serviceScopeFactory.ClearSubstitute();
     _loggerFactory.ClearSubstitute();
     GC.SuppressFinalize(this);
   }
@@ -29,7 +19,7 @@ public async Task Create_CreatesBus()
   {
     // arrange
     Configuration config = new(Hostname, new Credentials(Token));
-    DefaultRepeaterBusFactory sut = new(config, _loggerFactory, _serviceScopeFactory);
+    DefaultRepeaterBusFactory sut = new(config, _loggerFactory);
 
     // act
     await using var bus = sut.Create(Id);
@@ -43,7 +33,7 @@ public async Task Create_CredentialsNotDefined_ThrowsError()
   {
     // arrange
     Configuration config = new(Hostname);
-    DefaultRepeaterBusFactory sut = new(config, _loggerFactory, _serviceScopeFactory);
+    DefaultRepeaterBusFactory sut = new(config, _loggerFactory);
 
     // act
     var act = async () =>

test/SecTester.Repeater.Tests/Bus/SocketIoRepeaterBusTests.cs

@@ -7,21 +7,19 @@ public sealed class SocketIoRepeaterBusTests : IDisposable
   private static readonly SocketIoRepeaterBusOptions Options = new(Url);
 
   private readonly ISocketIoConnection _connection = Substitute.For<ISocketIoConnection>();
-  private readonly ITimerProvider _heartbeat = Substitute.For<ITimerProvider>();
   private readonly ILogger<IRepeaterBus> _logger = Substitute.For<ILogger<IRepeaterBus>>();
   private readonly ISocketIoMessage _socketIoMessage = Substitute.For<ISocketIoMessage>();
   private readonly SocketIoRepeaterBus _sut;
 
   public SocketIoRepeaterBusTests()
   {
-    _sut = new SocketIoRepeaterBus(Options, _connection, _heartbeat, _logger);
+    _sut = new SocketIoRepeaterBus(Options, _connection, _logger);
   }
 
   public void Dispose()
   {
     _socketIoMessage.ClearSubstitute();
     _connection.ClearSubstitute();
-    _heartbeat.ClearSubstitute();
     _logger.ClearSubstitute();
 
     GC.SuppressFinalize(this);
@@ -117,36 +115,6 @@ public async Task Connect_AlreadyConnected_DoNothing()
     await _connection.DidNotReceive().Connect();
   }
 
-  [Fact]
-  public async Task Connect_SchedulesPing()
-  {
-    // arrange
-    _connection.Connect().Returns(Task.CompletedTask);
-
-    // act
-    await _sut.Connect();
-
-    // assert
-    _heartbeat.Received().Elapsed += Arg.Any<ElapsedEventHandler>();
-    _heartbeat.Received().Start();
-  }
-
-  [Fact]
-  public async Task Connect_ShouldSendPingMessage()
-  {
-    // arrange
-    var elapsedEventArgs = EventArgs.Empty as ElapsedEventArgs;
-    _connection.Connect().Returns(Task.CompletedTask);
-    await _sut.Connect();
-
-    // act
-    _heartbeat.Elapsed += Raise.Event<ElapsedEventHandler>(new object(), elapsedEventArgs);
-
-    // assert
-    _heartbeat.Interval.Should().BeGreaterOrEqualTo(10_000);
-    await _connection.Received(2).EmitAsync("ping");
-  }
-
   [Fact]
   public async Task Deploy_Success()
   {
@@ -198,17 +166,4 @@ public async Task DisposeAsync_NotConnectedYet_Success()
     await _connection.DidNotReceive().Disconnect();
     _connection.Received().Dispose();
   }
-
-  [Fact]
-  public async Task DisposeAsync_StopsPingMessages()
-  {
-    // arrange
-    _connection.Connected.Returns(true);
-
-    // act
-    await _sut.DisposeAsync();
-
-    // assert
-    _heartbeat.Received().Stop();
-  }
 }

test/SecTester.Repeater.Tests/Extensions/ServiceCollectionExtensionsTests.cs

@@ -30,16 +30,6 @@ public void AddSecTesterRepeater_RegistersRepeaters()
     _sut.Received().AddScoped<IRepeaters, DefaultRepeaters>();
   }
 
-  [Fact]
-  public void AddSecTesterRepeater_RegistersTimerProvider()
-  {
-    // act
-    _sut.AddSecTesterRepeater();
-
-    // assert
-    _sut.Received().AddScoped<ITimerProvider, SystemTimerProvider>();
-  }
-
   [Fact]
   public void AddSecTesterRepeater_WithTimeout_RegistersHttpClient()
   {

test/SecTester.Repeater.Tests/Usings.cs

@@ -1,26 +1,18 @@
 global using System.Net;
-global using System.Net.Http.Json;
 global using System.Net.Sockets;
 global using System.Text;
-global using System.Text.Json;
-global using System.Text.Json.Serialization;
 global using System.Text.RegularExpressions;
-global using System.Timers;
 global using FluentAssertions;
 global using Microsoft.Extensions.DependencyInjection;
 global using Microsoft.Extensions.DependencyInjection.Extensions;
 global using Microsoft.Extensions.Logging;
 global using NSubstitute;
 global using NSubstitute.ClearExtensions;
-global using NSubstitute.ExceptionExtensions;
 global using NSubstitute.ReturnsExtensions;
 global using RichardSzalay.MockHttp;
 global using SecTester.Core;
 global using SecTester.Core.Bus;
-global using SecTester.Core.Commands;
-global using SecTester.Core.Dispatchers;
 global using SecTester.Core.Exceptions;
-global using SecTester.Core.RetryStrategies;
 global using SecTester.Core.Logger;
 global using SecTester.Core.Utils;
 global using SecTester.Repeater.Api;