/// <inheritdoc />
public void CancelTask(Guid taskId)
{
Trace.WriteLine("ENTER: Cancelling task '{0}' ...".FormatInvariant(taskId));
Lazy <DateTime> timestampUtc = new Lazy <DateTime>(() => this.dateTimeProvider.UtcNow);
ITaskRuntimeInfo taskInfo = this.repository.TaskRuntimeInfo.GetById(taskId);
if (taskInfo == null)
{
throw new KeyNotFoundException("Task '{0}' was not found.".FormatInvariant(taskId));
}
switch (taskInfo.Status)
{
case TaskStatus.Canceled:
case TaskStatus.Failed:
case TaskStatus.Success:
throw new InvalidOperationException("Task '{0}' status is {1} and will not be canceled.".FormatInvariant(taskId, taskInfo.Status));
}
ITaskMessageBusSender taskMessageBus = this.messageBus.Tasks.GetSender(taskInfo.TaskType);
taskMessageBus.NotifyTaskCancelRequest(taskId, timestampUtc.Value);
this.repository.TaskRuntimeInfo.RequestCancel(taskId, timestampUtc.Value);
Trace.WriteLine("EXIT: Task '{0}' canceled.".FormatInvariant(taskId));
}
