public void Execute(ScheduleTask task, bool throwOnError = false)
{
if (task.IsRunning)
{
return;
}
if (AsyncRunner.AppShutdownCancellationToken.IsCancellationRequested)
{
return;
}
bool faulted = false;
bool canceled = false;
string lastError = null;
ITask instance = null;
string stateName = null;
Type taskType = null;
try
{
taskType = Type.GetType(task.Type);
if (!PluginManager.IsActivePluginAssembly(taskType.Assembly))
{
return;
}
}
catch
{
return;
}
try
{
// set background task system customer as current customer
var customer = _userService.GetUserByUserName(SystemUserNames.BackgroundTask);
_workContext.CurrentUser = customer;
// create task instance
instance = _taskResolver(taskType);
stateName = task.Id.ToString();
// prepare and save entity
task.LastStartUtc = DateTime.UtcNow;
task.LastEndUtc = null;
task.NextRunUtc = null;
task.ProgressPercent = null;
task.ProgressMessage = null;
_scheduledTaskService.UpdateTask(task);
// create & set a composite CancellationTokenSource which also contains the global app shoutdown token
var cts = CancellationTokenSource.CreateLinkedTokenSource(AsyncRunner.AppShutdownCancellationToken, new CancellationTokenSource().Token);
AsyncState.Current.SetCancelTokenSource <ScheduleTask>(cts, stateName);
var ctx = new TaskExecutionContext(_componentContext, task)
{
ScheduleTask = task.Clone(),
CancellationToken = cts.Token
};
instance.Execute(ctx);
}
catch (Exception ex)
{
faulted = true;
canceled = ex is OperationCanceledException;
Logger.Error(string.Format("Error while running scheduled task '{0}'. {1}", task.Name, ex.Message), ex);
lastError = ex.Message.Truncate(995, "...");
if (throwOnError)
{
throw;
}
}
finally
{
// remove from AsyncState
if (stateName.HasValue())
{
AsyncState.Current.Remove <ScheduleTask>(stateName);
}
task.ProgressPercent = null;
task.ProgressMessage = null;
var now = DateTime.UtcNow;
task.LastError = lastError;
task.LastEndUtc = now;
if (faulted)
{
if ((!canceled && task.StopOnError) || instance == null)
{
task.Enabled = false;
}
}
else
{
task.LastSuccessUtc = now;
}
if (task.Enabled)
{
task.NextRunUtc = _scheduledTaskService.GetNextSchedule(task);
}
_scheduledTaskService.UpdateTask(task);
}
}