protected void ProcessQueue()
{
try
{
while (_run)
{
// Update time this thread was last alive
_threads[Thread.CurrentThread] = DateTime.Now;
// Check if increase of number of threads is desired
CheckThreadIncrementRequired();
// Wait until we receive a work item
IWork work = _workQueue.Dequeue(_startInfo.ThreadIdleTimeout, _cancelWaitHandle);
if (work == null)
{
// Dequeue has returned null or we should shutdown
if (_threads.Count > _startInfo.MinimumThreads)
{
lock (_syncObj)
{
if (_threads.Count > _startInfo.MinimumThreads)
{
ServiceRegistration.Get <ILogger>().Debug("ThreadPool.ProcessQueue(): Quitting (inUse: {0}, total: {1})", _inUseThreads, _threads.Count);
// remove thread from the pool
if (_threads.ContainsKey(Thread.CurrentThread))
{
DateTime time;
_threads.TryRemove(Thread.CurrentThread, out time);
}
break;
}
}
}
CheckForIntervalBasedWork();
// Skip this iteration if we got here and work is null
continue;
}
// ServiceRegistration.Get<ILogger>().Debug("ThreadPool.ProcessQueue(): Received valid work: {1}", work.State);
try
{
// Only process items which have status INQUEUE (don't process CANCEL'ed items)
if (work.State == WorkState.INQUEUE)
{
Thread.CurrentThread.Priority = work.ThreadPriority;
IncInUseThreadCount();
// ServiceRegistration.Get<ILogger>().Debug("ThreadPool.ProcessQueue(): Processing work {1}", work.Description);
work.Process();
// ServiceRegistration.Get<ILogger>().Debug("ThreadPool.ProcessQueue(): Finished processing work {0}", work.Description);
}
}
catch (Exception e)
{
ServiceRegistration.Get <ILogger>().Warn("ThreadPool.ProcessQueue(): Exception during processing work '{0}'", e, work.Description);
work.State = WorkState.ERROR;
work.Exception = e;
}
finally
{
if (work.State == WorkState.FINISHED || work.State == WorkState.ERROR)
{
Interlocked.Increment(ref _itemsProcessed);
// ServiceRegistration.Get<ILogger>().Debug("ThreadPool.ProcessQueue(): {0} items processed", _itemsProcessed);
DecInUseThreadCount();
// ServiceRegistration.Get<ILogger>().Debug("ThreadPool.ProcessQueue(): Finished processing work {0}", work.Description);
}
Thread.CurrentThread.Priority = _startInfo.DefaultThreadPriority;
}
CheckForIntervalBasedWork();
}
}
catch (ThreadAbortException)
{
ServiceRegistration.Get <ILogger>().Debug("ThreadPool.ProcessQueue(): Thread aborted");
Thread.ResetAbort();
}
catch (Exception e)
{
ServiceRegistration.Get <ILogger>().Error("ThreadPool.ProcessQueue(): Error executing work", e);
}
finally
{
if (_threads.ContainsKey(Thread.CurrentThread))
{
DateTime time;
_threads.TryRemove(Thread.CurrentThread, out time);
}
}
}