private void Controller()
{
while (true)
{
PublishHelper.LogVerboseInformation("ControllerThread: Waiting for operations");
int eventId = WaitHandle.WaitAny(_waitHandleArray, Interval);
if (eventId == 0)
{
//If exitevent is signalled, the process is exiting.
break;
}
if (!PublishHelper.ShouldBeginProcessingPublishOperation)
{
PublishHelper.LogVerboseInformation("ControllerThread: BeginProcessing is currently off");
_continueEvent.Reset();
continue;
}
int maxConcurrentOperations = PublishHelper.MaxConcurrentSyncOperations;
ThreadPool.SetMaxThreads(maxConcurrentOperations, maxConcurrentOperations);
if (!_operationInitialized)
{
_operationInitialized = true;
PublishHelper.LogVerboseInformation("ControllerThread: Initializing publish operation");
}
#region Schedule Operations
_continueEvent.Reset();
PublishOperation publishOperation;
try
{
while (PublishHelper.GetNextPublishOperation(out publishOperation))
{
if (_exitEvent.WaitOne(0))
{
//If this is signalled, the process is exiting
return;
}
string physicalPath = string.Empty;
bool siteInvalid = false;
try
{
// if the site was added or updated and then deleted, the add and update
// operations get always scheduled before the delete.
// so if the site is deleted, this will throw object not found exception.
// set the object as invalid so that this is never attempted again.
physicalPath = publishOperation.PhysicalPath;
}
catch (WebHostingObjectNotFoundException)
{
siteInvalid = true;
}
WaitCallback callback = null;
Operation operation = new Operation(
publishOperation.OperationId,
publishOperation.SiteName,
physicalPath,
PublishHelper.PublishUrl,
PublishHelper.AdminCredential);
int currentOperationCount = 0;
if (siteInvalid)
{
operation.Status = PublishOperationStatus.SourceOrDestinationInvalid;
lock (_completedOperations)
{
PublishHelper.LogVerboseInformation("ControllerThread: Queuing completed operation for site: {0} as it does not exist", operation.SiteName);
_completedOperations.Enqueue(operation);
}
continue;
}
PublishHelper.LogVerboseInformation("ControllerThread: Adding Operation {0} for {1} to the queue", operation.SiteName, publishOperation.SiteState);
if (publishOperation.SiteState == SiteState.Deleted)
{
lock (_pendingDeleteOperations)
{
_pendingDeleteOperations.Enqueue(operation);
currentOperationCount += _pendingDeleteOperations.Count;
}
callback = new WaitCallback(DeleteContent);
}
else
{
lock (_pendingPublishOperations)
{
_pendingPublishOperations.Enqueue(operation);
currentOperationCount += _pendingPublishOperations.Count;
}
callback = new WaitCallback(Publish);
}
AntaresEventProvider.EventWritePublishFailOverServiceOperationQueued(operation.SiteName);
ThreadPool.QueueUserWorkItem(callback);
AntaresEventProvider.EventWritePublishFailOverServiceDebugEvent(String.Format("ControllerThread: Current in queue: {0}, maxCount: {1}", currentOperationCount, maxConcurrentOperations));
if (currentOperationCount >= maxConcurrentOperations)
{
/// Dont queue more operations than the max count to let other publishers pick these operations up.
/// This does not mean that we will wait for the entire interval. As soon as a thread finishes, the continue event will
/// get signalled and new operations will get picked up till maxcount operations are queued again.
break;
}
}
}
catch (Exception ex)
{
AntaresEventProvider.EventWritePublishFailOverServiceUnableToGetNextOperation(ex.ToString());
}
#endregion
}
}
