public void RunTask(IRunningTask runningTask)
{
lock (RunningTasks)
{
RunningTasks.Add(runningTask.TaskId, runningTask);
}
runningTask.OnCompletedEventHandler += OnCompletedEventHandler;
Interlocked.Decrement(ref slots);
runningTask.Execute();
}
/// <summary>
/// Occurs when object should do its action.
/// </summary>
public void Execute()
{
if (taskManagerState == TaskManagerState.ClientOnly)
{
logger.WriteDebug("The server has client algorithm only.");
return;
}
logger.WriteDebug("Searching for new tasks in available queue...");
IReadOnlyCollection <QueueModel> queues = queueManager.GetAvailableQueues();
foreach (QueueModel queueModel in queues)
{
Int64 queueId = queueModel.Id;
Int64 serverId = serverManager.ServerId;
TaskRequestSpecification specification = new TaskRequestSpecification(queueId, serverId, maxTasksPerQueue);
List <TaskModel> taskModels;
bool isReceived = taskDataContext.TryGetAvailableTask(specification, out taskModels);
if (isReceived)
{
foreach (TaskModel taskModel in taskModels)
{
IRunningTask currentTask = null;
try
{
currentTask = taskBuilder.Build(taskModel);
lock (activeTasks)
{
activeTasks.Add(taskModel.Id, currentTask);
}
currentTask.OnCompletedEventHandler += OnCompletedEventHandler;
currentTask.Execute(); //TODO: Provide global Cancelation Token.
logger.WriteDebug("The task {0} has been received.", taskModel);
}
catch (Exception ex)
{
string msg = string.Format("There was an error during executing task: {0}.", taskModel);
logger.WriteError(ex, msg);
RestartTask(taskModel, msg, ex);
}
}
}
else
{
logger.WriteDebug("There is no new task in the storage.");
}
List <Int64> taskIds;
isReceived = taskDataContext.TryGetCancelTasks(queueId, serverId, out taskIds);
if (isReceived)
{
foreach (Int64 taskId in taskIds)
{
logger.WriteTrace("The task (id = {0}) has been marked for cancelation. Cancelling...", taskId);
IRunningTask runningTask;
lock (activeTasks)
{
if (activeTasks.ContainsKey(taskId) == false)
{
continue;
}
runningTask = activeTasks[taskId];
}
logger.WriteTrace("The task ({0}) is running. Cancelling...", taskId);
try
{
runningTask.Cancel();
}
catch (Exception ex)
{
//TODO: Decide what to do.
logger.WriteError("there was an exception during cancelation task.", ex);
}
logger.WriteTrace("The task has been marked for canceling.");
}
}
else
{
logger.WriteDebug("There is no task for cancelation.");
}
}
logger.WriteDebug("All tasks have been found if existed.");
}