/// <summary>
/// The one and only method that can be used to remove a task from this queue.
/// </summary>
/// <remarks>Can only be called from the TastEntry itself</remarks>
internal void Remove(TaskEntry entry)
{
LOG("Remove('" + entry + ") - Start");
ASSERT(entry != null, "Missing parameter 'entry'");
bool launchChecksAtEnd;
bool checkDelayedTasks = false;
bool checkRunningTasks = false;
lock ( LockObject )
{
LOG("Remove('" + entry + ") - Lock acquired");
CheckValidity();
launchChecksAtEnd = Disposed ? false : true;
entry.GetStatus((status) =>
{
var id = entry.ID;
switch (status)
{
case TaskEntry.Statuses.Removed:
// Already removed
// ASSERT( !AllTasks.ContainsKey(id), "The task is declared as Removed but is still in AllTasks" ); <= This can happen when 2 threads are removing the same TaskEntry at the same time => log but don't assert
LOG("Remove('" + entry + ") - Is already removed");
return;
case TaskEntry.Statuses.Delayed: {
// Remove item from 'DelayedTasks'
LOG("Remove('" + entry + ") - Is delayed");
var executionDate = entry.ExecutionDate;
var list = DelayedTasks[executionDate];
var rc = list.Remove(id);
ASSERT(rc, "Task was not in 'DelayedTasks'");
if (list.Count == 0)
{
// No more task for this DateTime
LOG("Remove('" + entry + ") - No more task for " + executionDate);
DelayedTasks.Remove(executionDate);
}
// The list has changed
checkDelayedTasks = true;
break;
}
case TaskEntry.Statuses.Queued: {
LOG("Remove('" + entry + ") - Is Queued");
// Recreate 'QueuedTasks' without this task's ID
QueuedTasks = new Queue <Guid>(QueuedTasks.Where((itemId) => (itemId != id)));
// The list has changed
checkRunningTasks = true;
break;
}
case TaskEntry.Statuses.Running: {
LOG("Remove('" + entry + ") - Is Running");
var rc = RunningTasks.Remove(id);
ASSERT(rc, "Task was not in 'RunningTasks'");
checkRunningTasks = true;
break;
}
default:
throw new NotImplementedException("Unknown task status '" + status + "'");
}
{
// Remove the task from 'AllTasks' and set its status to 'Removed'
LOG("Remove('" + entry + ") - Removing from AllTasks");
var rc = AllTasks.Remove(id);
ASSERT(rc, "Task was not in 'AllTasks'");
entry.SetStatus(TaskEntry.Statuses.Removed);
}
});
CheckValidity();
}
LOG("Remove('" + entry + ") - Lock released");
if (launchChecksAtEnd)
{
if (checkDelayedTasks)
{
// The 'DelayedTasks' has changed
CheckDelayedTasks();
}
if (checkRunningTasks)
{
// The 'RunningTasks' has changed
CheckRunningTasks();
}
LOG("Remove('" + entry + ") - Invoking " + onEntryRemoved.Count + " callbacks for 'OnEntryRemoved' event");
onEntryRemoved.Invoke(entry);
}
LOG("Remove('" + entry + ") - Exit");
}
