public virtual async Task ExecuteAsync(
TaskDescriptor task,
HttpContext httpContext,
bool throwOnError = false,
CancellationToken cancelToken = default)
{
Guard.NotNull(task, nameof(task));
if (_asyncRunner.AppShutdownCancellationToken.IsCancellationRequested)
{
return;
}
await _taskStore.LoadLastExecutionInfoAsync(task);
if (task.LastExecution?.IsRunning == true)
{
return;
}
ITask job = null;
Type taskType = null;
Exception exception = null;
bool faulted = false, canceled = false;
string lastError = null, stateName = null;
var executionInfo = _taskStore.CreateExecutionInfo(task);
try
{
taskType = _taskStore.GetTaskClrType(task);
if (taskType == null)
{
Logger.Debug($"Invalid scheduled task type: {task.Type.NaIfEmpty()}");
return;
}
if (!_appContext.ModuleCatalog.IsActiveModuleAssembly(taskType.Assembly))
{
return;
}
await _taskStore.InsertExecutionInfoAsync(executionInfo);
}
catch
{
// Get out on any initialization error.
return;
}
try
{
// Task history entry has been successfully added, now we execute the task.
// Create task instance.
job = _taskResolver(taskType);
stateName = task.Id.ToString();
// Create & set a composite CancellationTokenSource which also contains the global app shoutdown token.
var cts = CancellationTokenSource.CreateLinkedTokenSource(_asyncRunner.AppShutdownCancellationToken, cancelToken);
await _asyncState.CreateAsync(task, stateName, false, cts);
// Run the task
Logger.Debug("Executing scheduled task: {0}", task.Type);
var ctx = new TaskExecutionContext(_taskStore, httpContext, _componentContext, executionInfo);
//// TODO: (core) Uncomment job.Run and remove Task.Delay()
//await job.Run(ctx, cts.Token);
await Task.Delay(50, cts.Token);
}
catch (Exception ex)
{
exception = ex;
faulted = true;
canceled = ex is OperationCanceledException;
lastError = ex.ToAllMessages(true);
if (canceled)
{
Logger.Warn(ex, $"The scheduled task '{task.Name}' has been canceled.");
}
else
{
Logger.Error(ex, string.Concat($"Error while running scheduled task '{task.Name}'", ": ", ex.Message));
}
}
finally
{
var now = DateTime.UtcNow;
var updateTask = false;
executionInfo.IsRunning = false;
executionInfo.ProgressPercent = null;
executionInfo.ProgressMessage = null;
executionInfo.Error = lastError;
executionInfo.FinishedOnUtc = now;
if (faulted)
{
if ((!canceled && task.StopOnError) || task == null)
{
task.Enabled = false;
updateTask = true;
}
}
else
{
executionInfo.SucceededOnUtc = now;
}
try
{
Logger.Debug("Executed scheduled task: {0}. Elapsed: {1} ms.", task.Type, (now - executionInfo.StartedOnUtc).TotalMilliseconds);
// Remove from AsyncState.
if (stateName.HasValue())
{
// We don't just remove the cancellation token, but the whole state (along with the token)
// for the case that a state was registered during task execution.
await _asyncState.RemoveAsync <TaskDescriptor>(stateName);
}
}
catch (Exception ex)
{
Logger.Error(ex);
}
if (task.Enabled)
{
task.NextRunUtc = _taskStore.GetNextSchedule(task);
updateTask = true;
}
await _taskStore.UpdateExecutionInfoAsync(executionInfo);
if (updateTask)
{
await _taskStore.UpdateTaskAsync(task);
}
if (!canceled)
{
await Throttle.CheckAsync(
"Delete old schedule task history entries",
TimeSpan.FromHours(4),
async() => await _taskStore.TrimExecutionInfosAsync(cancelToken) > 0);
}
}
if (throwOnError && exception != null)
{
throw exception;
}
}