private static void DeadTaskTimerElapsed(object o)
{
if (TaskDataHandler.GetDeadTaskCount() > 0)
{
AgentHub.BroadcastMessage(null);
}
}
public TaskController(IHubContext <AgentHub> agentHub, IHubContext <TaskMonitorHub> monitorHub,
ApplicationHandler appHandler, TaskDataHandler dataHandler)
{
_agentHub = agentHub;
_monitorHub = monitorHub;
_applicationHandler = appHandler;
_dataHandler = dataHandler;
}
public void TaskFinished(SnTaskResult taskResult)
{
SnTrace.TaskManagement.Write("AgentHub TaskFinished called. Agent: {0} / {1}, taskId: {2}, code: {3}, error: {4}",
taskResult.MachineName, taskResult.AgentName, taskResult.Task.Id, taskResult.ResultCode,
taskResult.Error == null ? "" : taskResult.Error.Message);
try
{
if (string.IsNullOrEmpty(taskResult.Task.AppId))
{
SnLog.WriteWarning($"AppId is empty for task #{taskResult.Task.Id}.",
EventId.TaskManagement.Lifecycle);
return;
}
var doesApplicationNeedNotification = !string.IsNullOrWhiteSpace(taskResult.Task.GetFinalizeUrl());
// first we make sure that the app is accessible by sending a ping request
if (doesApplicationNeedNotification && !ApplicationHandler.SendPingRequest(taskResult.Task.AppId))
{
var app = ApplicationHandler.GetApplication(taskResult.Task.AppId);
SnLog.WriteError(string.Format("Ping request to application {0} ({1}) failed when finalizing task #{2}. Task success: {3}, error: {4}",
taskResult.Task.AppId,
app == null ? "unknown app" : app.ApplicationUrl,
taskResult.Task.Id,
taskResult.Successful,
taskResult.Error == null ? "-" : taskResult.Error.ToString()),
EventId.TaskManagement.Communication);
doesApplicationNeedNotification = false;
}
// remove the task from the database first
TaskDataHandler.FinalizeTask(taskResult);
SnTrace.TaskManagement.Write("AgentHub TaskFinished: task {0} has been deleted.", taskResult.Task.Id);
if (doesApplicationNeedNotification)
{
// This method does not need to be awaited, because we do not want to do anything
// with the result, only notify the app that the task has been finished.
ApplicationHandler.SendFinalizeNotificationAsync(taskResult);
}
// notify monitors
TaskMonitorHub.OnTaskEvent(taskResult.Successful
? SnTaskEvent.CreateDoneEvent(taskResult.Task.Id, taskResult.Task.Title, taskResult.ResultData, taskResult.Task.AppId, taskResult.Task.Tag, taskResult.MachineName, taskResult.AgentName)
: SnTaskEvent.CreateFailedEvent(taskResult.Task.Id, taskResult.Task.Title, taskResult.ResultData, taskResult.Task.AppId, taskResult.Task.Tag, taskResult.MachineName, taskResult.AgentName));
}
catch (Exception ex)
{
SnLog.WriteException(ex, "AgentHub TaskFinished failed.", EventId.TaskManagement.General);
}
}
public void FinishSubtask(string machineName, string agentName, SnSubtask subtask, SnTask task)
{
SnTrace.TaskManagement.Write("AgentHub FinishSubtask. Task id:{0}, agent:{1}, title:{2}", task.Id, agentName, subtask.Title);
try
{
TaskDataHandler.FinishSubtask(machineName, agentName, subtask, task);
TaskMonitorHub.OnTaskEvent(SnTaskEvent.CreateSubtaskFinishedEvent(task.Id, subtask.Title, subtask.Details, task.AppId, task.Tag, machineName, agentName, subtask.Id));
}
catch (Exception ex)
{
SnLog.WriteException(ex, "AgentHub FinishSubtask failed.", EventId.TaskManagement.General);
}
}
public void RegisterApplication(RegisterApplicationRequest appRequest)
{
try
{
var app = TaskDataHandler.RegisterApplication(appRequest);
}
catch (Exception ex)
{
// the client app needs to be notified
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound, ex));
}
// invalidate app cache
ApplicationHandler.Reset();
}
//===================================================================== Hub API
public SnTask GetTask(string machineName, string agentName, string[] capabilities)
{
SnTrace.TaskManagement.Write("AgentHub GetTask called. Agent: {0}, capabilities: {1}.", agentName, string.Join(", ", capabilities));
try
{
var task = TaskDataHandler.GetNextAndLock(machineName, agentName, capabilities);
SnTrace.TaskManagement.Write("AgentHub TaskDataHandler.GetNextAndLock returned with: " + (task == null ? "null" : "task " + task.Id.ToString()));
// task details are not passed to the monitor yet
if (task != null)
{
TaskMonitorHub.OnTaskEvent(SnTaskEvent.CreateStartedEvent(task.Id, task.Title, null, task.AppId, task.Tag, machineName, agentName));
}
return(task);
}
catch (Exception ex)
{
SnLog.WriteException(ex, "AgentHub GetTask failed.", EventId.TaskManagement.General);
}
return(null);
}
public TaskMonitorHub(TaskDataHandler dataHandler)
{
_dataHandler = dataHandler;
}
public DeadTaskHostedService(IServiceProvider services, ILogger <DeadTaskHostedService> logger, TaskDataHandler dataHandler)
{
_services = services;
_logger = logger;
_dataHandler = dataHandler;
}
public RegisterTaskResult RegisterTask(RegisterTaskRequest taskRequest)
{
Application app = null;
try
{
// load the corresponding application to make sure the appid is valid
app = ApplicationHandler.GetApplication(taskRequest.AppId);
}
catch (Exception ex)
{
SnLog.WriteException(ex, "Error loading app for id " + taskRequest.AppId, EventId.TaskManagement.General);
}
// If we do not know the appid, we must not register the task. Client applications
// must observe this response and try to re-register the application, before
// trying to register the task again (this can happen if the TaskManagement Web
// was unreachable when the client application tried to register the appid before).
if (app == null)
{
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound, RegisterTaskRequest.ERROR_UNKNOWN_APPID));
}
RegisterTaskResult result = null;
try
{
// calculate hash with the default algrithm if not given
var hash = taskRequest.Hash == 0
? ComputeTaskHash(taskRequest.Type + taskRequest.AppId + taskRequest.Tag + taskRequest.TaskData)
: taskRequest.Hash;
result = TaskDataHandler.RegisterTask(
taskRequest.Type,
taskRequest.Title,
taskRequest.Priority,
taskRequest.AppId,
taskRequest.Tag,
taskRequest.FinalizeUrl,
hash,
taskRequest.TaskData,
taskRequest.MachineName);
}
catch (Exception ex)
{
// the client app needs to be notified
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound, ex));
}
try
{
// notify agents
AgentHub.BroadcastMessage(result.Task);
// notify monitor clients
TaskMonitorHub.OnTaskEvent(SnTaskEvent.CreateRegisteredEvent(
result.Task.Id, result.Task.Title, string.Empty, result.Task.AppId,
result.Task.Tag, null, result.Task.Type, result.Task.Order,
result.Task.Hash, result.Task.TaskData));
}
catch (Exception ex)
{
// The task has been created successfully, this error is only about
// notification, so client applications should not be notified.
SnLog.WriteException(ex, "Error during agent or monitor notification after a task was registered.", EventId.TaskManagement.Communication);
}
return(result);
}
/// <summary>
/// Loads all task and subtask events for a single task.
/// </summary>
/// <param name="appId">Application id to identify the client application.</param>
/// <param name="tag">If a tag is provided, events will be filtered by it.</param>
/// <param name="taskId">Id of the task to load events for.</param>
/// <returns></returns>
public SnTaskEvent[] GetDetailedTaskEvents(string appId, string tag, int taskId)
{
return(TaskDataHandler.GetDetailedTaskEvents(appId, tag, taskId));
}
//===================================================================== Hub API
/// <summary>
/// Loads all tasks from the database that are registered, but not finished or failed. The real status of
/// currently in progress tasks will be set with the next progress or event call.
/// </summary>
/// <param name="appId">Application id to identify the client application.</param>
/// <param name="tag">If a tag is provided, events will be filtered by it.</param>
/// <returns></returns>
public SnTaskEvent[] GetUnfinishedTasks(string appId, string tag)
{
return(TaskDataHandler.GetUnfinishedTasks(appId, tag));
}
public void RefreshLock(string machineName, string agentName, int taskId)
{
SnTrace.TaskManagement.Write("AgentHub RefreshLock. Agent: {0}, task: {1}.", agentName, taskId);
TaskDataHandler.RefreshLock(taskId);
}
public AgentHub(IHubContext <TaskMonitorHub> monitorHub, ApplicationHandler appHandler, TaskDataHandler dataHandler)
{
_monitorHub = monitorHub;
_applicationHandler = appHandler;
_dataHandler = dataHandler;
}
