public QueryProcessorController GetAvailableFromPool(string Server, string Database, Guid newTaskId)
{
QueryProcessorController proc = null;
int count = 0;
int maxCount = FI.Common.AppConfig.DA_OlapProcessorCount;
// find avalailable
while (true)
{
// check if it's canceled already
if (IsTaskCanceled(newTaskId))
{
throw new Exception("Task is canceled: " + newTaskId.ToString());
}
lock (this)
{
for (int i = 0; i < _pool.Count; i++)
{
proc = (QueryProcessorController)_pool[i];
if (proc.Server == Server && proc.Database == Database)
{
count++;
if (!proc.IsAllocated)
{
proc.Allocate(newTaskId);
return(proc);
}
}
}
// if possible to add processor
if (count < maxCount)
{
proc = new QueryProcessorController(Server, Database);
_pool.Add(proc);
proc.Allocate(newTaskId);
return(proc);
}
}
// sleep till next loop
System.Threading.Thread.Sleep(200);
}
}
public void ReleaseByTaskId(Guid TaskId)
{
lock (this)
{
if (TaskId == Guid.Empty)
{
throw new ArgumentException("Invalid TaskId: Empty");
}
if (!_canceledTasks.Contains(TaskId.ToString()))
{
_canceledTasks.Add(TaskId.ToString());
}
for (int i = 0; i < _pool.Count; i++)
{
QueryProcessorController proc = (QueryProcessorController)_pool[i];
if (proc.TaskId == TaskId)
{
proc.Release(true);
}
}
}
}