Add TaskManager shutdown logging of remaining tasks

Agent/Phantom.Agent.Minecraft/Java/JavaRuntimeDiscovery.cs

@@ -7,7 +7,7 @@ using Serilog;
 namespace Phantom.Agent.Minecraft.Java;
 
 public sealed class JavaRuntimeDiscovery {
-	private static readonly ILogger Logger = PhantomLogger.Create(typeof(JavaRuntimeDiscovery));
+	private static readonly ILogger Logger = PhantomLogger.Create(nameof(JavaRuntimeDiscovery));
 
 	public static string? GetSystemSearchPath() {
 		const string LinuxJavaPath = "/usr/lib/jvm";

Agent/Phantom.Agent.Rpc/RpcLauncher.cs

@@ -31,7 +31,7 @@ public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
 	private readonly SemaphoreSlim disconnectSemaphore;
 	private readonly CancellationToken receiveCancellationToken;
 
-	private RpcLauncher(RpcConfiguration config, ClientSocket socket, Guid agentGuid, Func<RpcServerConnection, IMessageToAgentListener> messageListenerFactory, SemaphoreSlim disconnectSemaphore, CancellationToken receiveCancellationToken) : base(socket, config.Logger) {
+	private RpcLauncher(RpcConfiguration config, ClientSocket socket, Guid agentGuid, Func<RpcServerConnection, IMessageToAgentListener> messageListenerFactory, SemaphoreSlim disconnectSemaphore, CancellationToken receiveCancellationToken) : base(config, socket) {
 		this.config = config;
 		this.agentGuid = agentGuid;
 		this.messageListenerFactory = messageListenerFactory;
@@ -40,7 +40,7 @@ public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
 	}
 
 	protected override void Connect(ClientSocket socket) {
-		var logger = config.Logger;
+		var logger = config.RuntimeLogger;
 		var url = config.TcpUrl;
 
 		logger.Information("Starting ZeroMQ client and connecting to {Url}...", url);
@@ -52,7 +52,7 @@ public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
 		var connection = new RpcServerConnection(socket, replyTracker);
 		ServerMessaging.SetCurrentConnection(connection);
 		
-		var logger = config.Logger;
+		var logger = config.RuntimeLogger;
 		var handler = new MessageToAgentHandler(messageListenerFactory(connection), logger, taskManager, receiveCancellationToken);
 		var keepAliveLoop = new KeepAliveLoop(connection);
 
@@ -93,7 +93,7 @@ public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
 		var unregisterTimeoutTask = Task.Delay(TimeSpan.FromSeconds(5), CancellationToken.None);
 		var finishedTask = await Task.WhenAny(ServerMessaging.Send(new UnregisterAgentMessage(agentGuid)), unregisterTimeoutTask);
 		if (finishedTask == unregisterTimeoutTask) {
-			config.Logger.Error("Timed out communicating agent shutdown with the server.");
+			config.RuntimeLogger.Error("Timed out communicating agent shutdown with the server.");
 		}
 	}
 

Agent/Phantom.Agent.Rpc/ServerMessaging.cs

@@ -5,7 +5,7 @@ using Serilog;
 namespace Phantom.Agent.Rpc;
 
 public static class ServerMessaging {
-	private static readonly ILogger Logger = PhantomLogger.Create(typeof(ServerMessaging));
+	private static readonly ILogger Logger = PhantomLogger.Create(nameof(ServerMessaging));
 	
 	private static RpcServerConnection? CurrentConnection { get; set; }
 	private static RpcServerConnection CurrentConnectionOrThrow => CurrentConnection ?? throw new InvalidOperationException("Server connection not ready.");

Agent/Phantom.Agent.Services/AgentServices.cs

@@ -18,7 +18,7 @@ public sealed class AgentServices {
 
 	public AgentServices(AgentInfo agentInfo, AgentFolders agentFolders) {
 		this.AgentFolders = agentFolders;
-		this.TaskManager = new TaskManager();
+		this.TaskManager = new TaskManager(PhantomLogger.Create<TaskManager, AgentServices>());
 		this.JavaRuntimeRepository = new JavaRuntimeRepository();
 		this.InstanceSessionManager = new InstanceSessionManager(agentInfo, agentFolders, JavaRuntimeRepository, TaskManager);
 	}
@@ -30,10 +30,9 @@ public sealed class AgentServices {
 	}
 
 	public async Task Shutdown() {
-		Logger.Information("Stopping instances...");
+		Logger.Information("Stopping services...");
-		await InstanceSessionManager.StopAll();
 		
-		Logger.Information("Stopping task manager...");
+		await InstanceSessionManager.StopAll();
 		await TaskManager.Stop();
 		
 		Logger.Information("Services stopped.");

Agent/Phantom.Agent.Services/Instances/Instance.cs

@@ -143,7 +143,7 @@ sealed class Instance : IDisposable {
 		public override void ReportStatus(IInstanceStatus newStatus) {
 			int myStatusUpdateCounter = Interlocked.Increment(ref statusUpdateCounter);
 			
-			instance.launchServices.TaskManager.Run(async () => {
+			instance.launchServices.TaskManager.Run("Report status of instance " + instance.shortName + " as " + newStatus.GetType().Name, async () => {
 				if (myStatusUpdateCounter == statusUpdateCounter) {
 					instance.currentStatus = newStatus;
 					await ServerMessaging.Send(new ReportInstanceStatusMessage(Configuration.InstanceGuid, newStatus));

Agent/Phantom.Agent.Services/Instances/InstanceLogSender.cs

@@ -24,7 +24,7 @@ sealed class InstanceLogSender {
 		this.logger = PhantomLogger.Create<InstanceLogSender>(name);
 		this.cancellationTokenSource = new CancellationTokenSource();
 		this.cancellationToken = cancellationTokenSource.Token;
-		taskManager.Run(Run);
+		taskManager.Run("Instance log sender for " + name, Run);
 	}
 
 	private async Task Run() {

Agent/Phantom.Agent.Services/Instances/InstanceSessionManager.cs

@@ -132,6 +132,8 @@ sealed class InstanceSessionManager : IDisposable {
 
 	public async Task StopAll() {
 		shutdownCancellationTokenSource.Cancel();
+		
+		Logger.Information("Stopping all instances...");
 
 		await semaphore.WaitAsync(CancellationToken.None);
 		try {

Agent/Phantom.Agent.Services/Instances/States/InstanceLaunchingState.cs

@@ -19,7 +19,7 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 	public void Initialize() {
 		context.Logger.Information("Session starting...");
 
-		var launchTask = context.LaunchServices.TaskManager.Run(DoLaunch);
+		var launchTask = context.LaunchServices.TaskManager.Run("Launch procedure for instance " + context.ShortName, DoLaunch);
 		launchTask.ContinueWith(OnLaunchSuccess, CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, TaskScheduler.Default);
 		launchTask.ContinueWith(OnLaunchFailure, CancellationToken.None, TaskContinuationOptions.NotOnRanToCompletion, TaskScheduler.Default);
 	}

Agent/Phantom.Agent.Services/Instances/States/InstanceRunningState.cs

@@ -30,7 +30,7 @@ sealed class InstanceRunningState : IInstanceState {
 		if (session.HasEnded) {
 			if (sessionObjects.Dispose()) {
 				context.Logger.Warning("Session ended immediately after it was started.");
-				context.LaunchServices.TaskManager.Run(() => context.TransitionState(new InstanceNotRunningState(), InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError)));
+				context.LaunchServices.TaskManager.Run("Transition state of instance " + context.ShortName + " to not running", () => context.TransitionState(new InstanceNotRunningState(), InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError)));
 			}
 		}
 		else {
@@ -75,7 +75,7 @@ sealed class InstanceRunningState : IInstanceState {
 		}
 		
 		isStopping = true;
-		context.LaunchServices.TaskManager.Run(() => StopLater(stopStrategy.Seconds));
+		context.LaunchServices.TaskManager.Run("Delayed stop timer for instance " + context.ShortName, () => StopLater(stopStrategy.Seconds));
 		return (this, StopInstanceResult.StopInitiated);
 	}
 

Agent/Phantom.Agent.Services/Instances/States/InstanceStoppingState.cs

@@ -21,7 +21,7 @@ sealed class InstanceStoppingState : IInstanceState, IDisposable {
 	public void Initialize() {
 		context.Logger.Information("Session stopping.");
 		context.ReportStatus(InstanceStatus.Stopping);
-		context.LaunchServices.TaskManager.Run(DoStop);
+		context.LaunchServices.TaskManager.Run("Stop procedure for instance " + context.ShortName, DoStop);
 	}
 
 	private async Task DoStop() {

Agent/Phantom.Agent/AgentKey.cs

@@ -8,7 +8,7 @@ using Serilog;
 namespace Phantom.Agent;
 
 static class AgentKey {
-	private static ILogger Logger { get; } = PhantomLogger.Create(typeof(AgentKey));
+	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(AgentKey));
 
 	public static Task<(NetMQCertificate, AgentAuthToken)?> Load(string? agentKeyToken, string? agentKeyFilePath) {
 		if (agentKeyFilePath != null) {

Agent/Phantom.Agent/GuidFile.cs

@@ -6,7 +6,7 @@ using Serilog;
 namespace Phantom.Agent; 
 
 static class GuidFile {
-	private static ILogger Logger { get; } = PhantomLogger.Create(typeof(GuidFile));
+	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(GuidFile));
 
 	private const string GuidFileName = "agent.guid";
 	

Agent/Phantom.Agent/Program.cs

@@ -53,7 +53,8 @@ try {
 	await agentServices.Initialize();
 
 	var rpcDisconnectSemaphore = new SemaphoreSlim(0, 1);
-	var rpcTask = RpcLauncher.Launch(new RpcConfiguration(PhantomLogger.Create("Rpc"), serverHost, serverPort, serverCertificate), agentToken, agentInfo, MessageListenerFactory, rpcDisconnectSemaphore, shutdownCancellationToken);
+	var rpcConfiguration = new RpcConfiguration(PhantomLogger.Create("Rpc"), PhantomLogger.Create<TaskManager>("Rpc"), serverHost, serverPort, serverCertificate);
+	var rpcTask = RpcLauncher.Launch(rpcConfiguration, agentToken, agentInfo, MessageListenerFactory, rpcDisconnectSemaphore, shutdownCancellationToken);
 	try {
 		await rpcTask.WaitAsync(shutdownCancellationToken);
 	} finally {

Common/Phantom.Common.Logging/PhantomLogger.cs

@@ -33,8 +33,8 @@ public static class PhantomLogger {
 		return Base.ForContext("Category", name);
 	}
 
-	public static ILogger Create(Type type) {
+	public static ILogger Create(string name1, string name2) {
-		return Create(type.Name);
+		return Create(name1 + ":" + name2);
 	}
 
 	public static ILogger Create<T>() {
@@ -42,11 +42,11 @@ public static class PhantomLogger {
 	}
 
 	public static ILogger Create<T>(string name) {
-		return Create(typeof(T).Name + ":" + name);
+		return Create(typeof(T).Name, name);
 	}
 
 	public static ILogger Create<T1, T2>() {
-		return Create(typeof(T1).Name + ":" + typeof(T2).Name);
+		return Create(typeof(T1).Name, typeof(T2).Name);
 	}
 
 	public static void Dispose() {

Server/Phantom.Server.Rpc/RpcLauncher.cs

@@ -25,14 +25,14 @@ public sealed class RpcLauncher : RpcRuntime<ServerSocket> {
 	private readonly Func<RpcClientConnection, IMessageToServerListener> listenerFactory;
 	private readonly CancellationToken cancellationToken;
 
-	private RpcLauncher(RpcConfiguration config, ServerSocket socket, Func<RpcClientConnection, IMessageToServerListener> listenerFactory, CancellationToken cancellationToken) : base(socket, config.Logger) {
+	private RpcLauncher(RpcConfiguration config, ServerSocket socket, Func<RpcClientConnection, IMessageToServerListener> listenerFactory, CancellationToken cancellationToken) : base(config, socket) {
 		this.config = config;
 		this.listenerFactory = listenerFactory;
 		this.cancellationToken = cancellationToken;
 	}
 
 	protected override void Connect(ServerSocket socket) {
-		var logger = config.Logger;
+		var logger = config.RuntimeLogger;
 		var url = config.TcpUrl;
 
 		logger.Information("Starting ZeroMQ server on {Url}...", url);
@@ -41,7 +41,7 @@ public sealed class RpcLauncher : RpcRuntime<ServerSocket> {
 	}
 
 	protected override void Run(ServerSocket socket, MessageReplyTracker replyTracker, TaskManager taskManager) {
-		var logger = config.Logger;
+		var logger = config.RuntimeLogger;
 		var clients = new Dictionary<ulong, Client>();
 
 		void OnConnectionClosed(object? sender, RpcClientConnectionClosedEventArgs e) {

Server/Phantom.Server.Services/Agents/AgentManager.cs

@@ -32,7 +32,7 @@ public sealed class AgentManager {
 		this.cancellationToken = configuration.CancellationToken;
 		this.authToken = authToken;
 		this.databaseProvider = databaseProvider;
-		taskManager.Run(RefreshAgentStatus);
+		taskManager.Run("Refresh agent status loop", RefreshAgentStatus);
 	}
 
 	public async Task Initialize() {

Server/Phantom.Server.Services/Audit/AuditLog.cs

@@ -36,7 +36,7 @@ public sealed partial class AuditLog {
 
 	private void AddEvent(string? userId, AuditEventType eventType, string subjectId, Dictionary<string, object?>? extra = null) {
 		var eventEntity = new AuditEventEntity(userId, eventType, subjectId, extra);
-		taskManager.Run(() => AddEventToDatabase(eventEntity));
+		taskManager.Run("Store audit log event", () => AddEventToDatabase(eventEntity));
 	}
 
 	private async Task AddEvent(AuditEventType eventType, string subjectId, Dictionary<string, object?>? extra = null) {

Server/Phantom.Server.Web.Identity/Authentication/PhantomLoginStore.cs

@@ -20,7 +20,7 @@ public sealed class PhantomLoginStore {
 
 	private PhantomLoginStore(TaskManager taskManager, CancellationToken cancellationToken) {
 		this.cancellationToken = cancellationToken;
-		taskManager.Run(RunExpirationLoop);
+		taskManager.Run("Web login entry expiration loop", RunExpirationLoop);
 	}
 	
 	private async Task RunExpirationLoop() {

Server/Phantom.Server/CertificateFiles.cs

@@ -8,7 +8,7 @@ using Serilog;
 namespace Phantom.Server;
 
 static class CertificateFiles {
-	private static ILogger Logger { get; } = PhantomLogger.Create(typeof(CertificateFiles));
+	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(CertificateFiles));
 
 	private const string SecretKeyFileName = "secret.key";
 	private const string AgentKeyFileName = "agent.key";

Server/Phantom.Server/Program.cs

@@ -15,7 +15,7 @@ using WebConfiguration = Phantom.Server.Web.Configuration;
 using WebLauncher = Phantom.Server.Web.Launcher;
 
 var cancellationTokenSource = new CancellationTokenSource();
-var taskManager = new TaskManager();
+var taskManager = new TaskManager(PhantomLogger.Create<TaskManager>("Server"));
 
 PosixSignals.RegisterCancellation(cancellationTokenSource, static () => {
 	PhantomLogger.Root.InformationHeading("Stopping Phantom Panel server...");
@@ -53,7 +53,7 @@ try {
 	
 	var (certificate, agentToken) = certificateData.Value;
 	
-	var rpcConfiguration = new RpcConfiguration(PhantomLogger.Create("Rpc"), rpcServerHost, rpcServerPort, certificate);
+	var rpcConfiguration = new RpcConfiguration(PhantomLogger.Create("Rpc"), PhantomLogger.Create<TaskManager>("Rpc"), rpcServerHost, rpcServerPort, certificate);
 	var webConfiguration = new WebConfiguration(PhantomLogger.Create("Web"), webServerHost, webServerPort, webBasePath, webKeysPath, cancellationTokenSource.Token);
 
 	PhantomLogger.Root.InformationHeading("Launching Phantom Panel server...");
@@ -79,7 +79,6 @@ try {
 } finally {
 	cancellationTokenSource.Cancel();
 	
-	PhantomLogger.Root.Information("Stopping task manager...");
 	await taskManager.Stop();
 	
 	cancellationTokenSource.Dispose();

Utils/Phantom.Utils.Rpc/Message/MessageHandler.cs

@@ -19,7 +19,7 @@ public abstract class MessageHandler<TListener> {
 	
 	internal void Enqueue<TMessage, TReply>(uint sequenceId, TMessage message) where TMessage : IMessage<TListener, TReply> {
 		cancellationToken.ThrowIfCancellationRequested();
-		taskManager.Run(async () => {
+		taskManager.Run("Handle message {Type}" + message.GetType().Name, async () => {
 			try {
 				await Handle<TMessage, TReply>(sequenceId, message);
 			} catch (Exception e) {

Utils/Phantom.Utils.Rpc/RpcConfiguration.cs

@@ -3,6 +3,6 @@ using Serilog;
 
 namespace Phantom.Utils.Rpc;
 
-public sealed record RpcConfiguration(ILogger Logger, string Host, ushort Port, NetMQCertificate ServerCertificate) {
+public sealed record RpcConfiguration(ILogger RuntimeLogger, ILogger TaskManagerLogger, string Host, ushort Port, NetMQCertificate ServerCertificate) {
 	public string TcpUrl => "tcp://" + Host + ":" + Port;
 }

Utils/Phantom.Utils.Rpc/RpcRuntime.cs

@@ -26,17 +26,17 @@ static class RpcRuntime {
 
 public abstract class RpcRuntime<TSocket> where TSocket : ThreadSafeSocket, new() {
 	private readonly TSocket socket;
+	private readonly ILogger runtimeLogger;
 	private readonly MessageReplyTracker replyTracker;
 	private readonly TaskManager taskManager;
-	private readonly ILogger logger;
 
-	protected RpcRuntime(TSocket socket, ILogger logger) {
+	protected RpcRuntime(RpcConfiguration configuration, TSocket socket) {
 		RpcRuntime.MarkRuntimeCreated();
 		RpcRuntime.SetDefaultSocketOptions(socket.Options);
 		this.socket = socket;
-		this.logger = logger;
+		this.runtimeLogger = configuration.RuntimeLogger;
-		this.replyTracker = new MessageReplyTracker(logger);
+		this.replyTracker = new MessageReplyTracker(runtimeLogger);
-		this.taskManager = new TaskManager();
+		this.taskManager = new TaskManager(configuration.TaskManagerLogger);
 	}
 
 	protected async Task Launch() {
@@ -51,13 +51,12 @@ public abstract class RpcRuntime<TSocket> where TSocket : ThreadSafeSocket, new(
 		} catch (OperationCanceledException) {
 			// ignore
 		} finally {
-			logger.Information("Stopping task manager...");
 			await taskManager.Stop();
 			await Disconnect();
 			
 			socket.Dispose();
 			NetMQConfig.Cleanup();
-			logger.Information("ZeroMQ client stopped.");
+			runtimeLogger.Information("ZeroMQ client stopped.");
 		}
 	}
 	

Utils/Phantom.Utils.Runtime/Phantom.Utils.Runtime.csproj

@@ -5,6 +5,10 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Serilog" />
+  </ItemGroup>
   
   <ItemGroup>
     <ProjectReference Include="..\Phantom.Utils.Collections\Phantom.Utils.Collections.csproj" />

Utils/Phantom.Utils.Runtime/TaskManager.cs

@@ -1,21 +1,24 @@
 using System.Collections.Concurrent;
 using Phantom.Utils.Collections;
+using Serilog;
 
 namespace Phantom.Utils.Runtime; 
 
 public sealed class TaskManager {
+	private readonly ILogger logger;
 	private readonly CancellationTokenSource cancellationTokenSource = new ();
 	private readonly CancellationToken cancellationToken;
 	
-	private readonly ConcurrentDictionary<Task, object?> runningTasks = new (ReferenceEqualityComparer<Task>.Instance);
+	private readonly ConcurrentDictionary<Task, string> runningTasks = new (ReferenceEqualityComparer<Task>.Instance);
 	
-	public TaskManager() {
+	public TaskManager(ILogger logger) {
-		cancellationToken = cancellationTokenSource.Token;
+		this.logger = logger;
+		this.cancellationToken = cancellationTokenSource.Token;
 	}
 
-	private T Add<T>(T task) where T : Task {
+	private T Add<T>(string name, T task) where T : Task {
 		cancellationToken.ThrowIfCancellationRequested();
-		runningTasks.TryAdd(task, null);
+		runningTasks.TryAdd(task, name);
 		task.ContinueWith(OnFinished, CancellationToken.None, TaskContinuationOptions.RunContinuationsAsynchronously, TaskScheduler.Default);
 		return task;
 	}
@@ -24,21 +27,44 @@ public sealed class TaskManager {
 		runningTasks.TryRemove(task, out _);
 	}
 
-	public Task Run(Action action) {
+	public Task Run(string name, Action action) {
-		return Add(Task.Run(action, cancellationToken));
+		return Add(name, Task.Run(action, cancellationToken));
 	}
 
-	public Task Run(Func<Task> taskFunc) {
+	public Task Run(string name, Func<Task> taskFunc) {
-		return Add(Task.Run(taskFunc, cancellationToken));
+		return Add(name, Task.Run(taskFunc, cancellationToken));
 	}
 
-	public Task<T> Run<T>(Func<Task<T>> taskFunc) {
+	public Task<T> Run<T>(string name, Func<Task<T>> taskFunc) {
-		return Add(Task.Run(taskFunc, cancellationToken));
+		return Add(name, Task.Run(taskFunc, cancellationToken));
 	}
 
 	public async Task Stop() {
-		cancellationTokenSource.Cancel();
+		logger.Information("Stopping task manager...");
 		
+		cancellationTokenSource.Cancel();
+
+		var remainingTasksAwaiterTask = WaitForRemainingTasks();
+		while (true) {
+			var logStateTimeoutTask = Task.Delay(TimeSpan.FromSeconds(10), CancellationToken.None);
+			var completedTask = await Task.WhenAny(remainingTasksAwaiterTask, logStateTimeoutTask);
+			if (completedTask == logStateTimeoutTask) {
+				var remainingTaskNames = runningTasks.Values.Order().ToList();
+				var remainingTaskNameList = string.Join('\n', remainingTaskNames.Select(static name => "- " + name));
+				logger.Warning("Waiting for {TaskCount} task(s) to finish:\n{TaskNames}", remainingTaskNames.Count, remainingTaskNameList);
+			}
+			else {
+				break;
+			}
+		}
+
+		runningTasks.Clear();
+		cancellationTokenSource.Dispose();
+		
+		logger.Information("Task manager stopped.");
+	}
+
+	private async Task WaitForRemainingTasks() {
 		foreach (var task in runningTasks.Keys) {
 			try {
 				await task;
@@ -46,8 +72,5 @@ public sealed class TaskManager {
 				// ignored
 			}
 		}
-		
-		runningTasks.Clear();
-		cancellationTokenSource.Dispose();
 	}
 }