private void CleanUpZombieTasks()
{
while (true)
{
lock (typeof(TaskManager))
{
DateTime now = DateTime.Now;
List <Guid> entriesToDelete = new List <Guid>();
foreach (Guid key in this.dctTasks.Keys)
{
TaskDescription td = this.dctTasks[key];
if (td.CreationDateTime.Subtract(now).TotalMinutes > 15)
{
if (td.Thread.ThreadState == ThreadState.Running)
{
td.Thread.Abort();
}
entriesToDelete.Add(key);
}
}
foreach (Guid key in entriesToDelete)
{
this.dctTasks.Remove(key);
}
}
Thread.Sleep((int)TimeSpan.FromMinutes(15).TotalMilliseconds);
}
}
public XElement QueryTask(Guid taskId)
{
TaskDescription td = null;
lock (typeof(TaskManager))
{
if (!this.dctTasks.ContainsKey(taskId))
{
//throw new InvalidOperationException("Task not found.");
return(new XElement("root", new XElement("status", "ignored")));
}
td = this.dctTasks[taskId];
}
return(td.Task.Query());
}
public void TerminateTask(Guid taskId)
{
TaskDescription td = null;
lock (typeof(TaskManager))
{
if (this.dctTasks.ContainsKey(taskId))
{
td = this.dctTasks[taskId];
this.dctTasks.Remove(taskId);
}
}
if (td != null)
{
td.Thread.Abort();
}
}
public string GetResult(Guid taskId)
{
TaskDescription td = null;
lock (typeof(TaskManager))
{
if (!this.dctTasks.ContainsKey(taskId))
{
throw new InvalidOperationException("Task not found.");
}
td = this.dctTasks[taskId];
if (td.Thread.ThreadState == ThreadState.Running)
{
throw new InvalidOperationException("Cannot get result from task that is running.");
}
this.dctTasks.Remove(taskId);
}
return(td.Task.GetResult());
}