public bool Add(GrandOutputEventInfo e, FinalReceiver receiver)
{
if (receiver == null)
{
throw new ArgumentNullException();
}
return(DoAdd(e, receiver));
}
public EventItem( GrandOutputEventInfo e, FinalReceiver receiver )
{
EventInfo = e;
Receiver = receiver;
}
bool DoAdd( GrandOutputEventInfo e, FinalReceiver receiver )
{
bool result = true;
Debug.Assert( e.Entry != null || receiver == null, "Only the MustStop item has null everywhere." );
if( receiver == null )
{
// This is the MustStop message.
_queue.Enqueue( new EventItem( e, null ) );
lock( _dispatchLock ) Monitor.Pulse( _dispatchLock );
// Ensures that if _overloadedErrorWaiting is true, a final "Lost Event" monitoring error is sent.
_nextCapacityError = DateTime.MinValue;
Interlocked.MemoryBarrier();
}
else
{
// Normal message.
Interlocked.MemoryBarrier();
var strat = _strat;
if( strat == null ) return false;
if( strat.IsOpened( ref _maxQueuedCount ) )
{
// Normal message and no queue overload detected.
Interlocked.Increment( ref _nonBlockingCount );
_queue.Enqueue( new EventItem( e, receiver ) );
lock( _dispatchLock ) Monitor.Pulse( _dispatchLock );
}
else
{
// Overload has been detected.
// Unlock the configuration: the message will not be handled.
if( receiver.ConfigLock != null ) receiver.ConfigLock.Unlock();
Interlocked.Increment( ref _eventLostCount );
// A new "Lost Event" monitoring error must be sent once.
_overloadedErrorWaiting = true;
result = false;
}
Interlocked.MemoryBarrier();
}
// Whatever happens, if a "Lost Event" monitoring error must be send once,
// checks to see if we must send it now.
Interlocked.MemoryBarrier();
if( _overloadedErrorWaiting )
{
var now = receiver != null ? e.Entry.LogTime.TimeUtc : DateTime.MaxValue;
if( now > _nextCapacityError )
{
// Double check locking.
lock( _overloadLock )
{
if( _overloadedErrorWaiting && now > _nextCapacityError )
{
ActivityMonitor.CriticalErrorCollector.Add( new CKException( "GrandOutput dispatcher overload. Lost {0} total events.", _eventLostCount ), null );
if( receiver != null ) _nextCapacityError = now.Add( _delayBetweenCapacityError );
_overloadedErrorWaiting = false;
}
}
}
}
return result;
}
public bool Add( GrandOutputEventInfo e, FinalReceiver receiver )
{
if( receiver == null ) throw new ArgumentNullException();
return DoAdd( e, receiver );
}
public EventItem(GrandOutputEventInfo e, FinalReceiver receiver)
{
EventInfo = e;
Receiver = receiver;
}
bool DoAdd(GrandOutputEventInfo e, FinalReceiver receiver)
{
bool result = true;
Debug.Assert(e.Entry != null || receiver == null, "Only the MustStop item has null everywhere.");
if (receiver == null)
{
// This is the MustStop message.
_queue.Enqueue(new EventItem(e, null));
lock (_dispatchLock) Monitor.Pulse(_dispatchLock);
// Ensures that if _overloadedErrorWaiting is true, a final "Lost Event" monitoring error is sent.
_nextCapacityError = DateTime.MinValue;
Interlocked.MemoryBarrier();
}
else
{
// Normal message.
Interlocked.MemoryBarrier();
var strat = _strat;
if (strat == null)
{
return(false);
}
if (strat.IsOpened(ref _maxQueuedCount))
{
// Normal message and no queue overload detected.
Interlocked.Increment(ref _nonBlockingCount);
_queue.Enqueue(new EventItem(e, receiver));
lock (_dispatchLock) Monitor.Pulse(_dispatchLock);
}
else
{
// Overload has been detected.
// Unlock the configuration: the message will not be handled.
if (receiver.ConfigLock != null)
{
receiver.ConfigLock.Unlock();
}
Interlocked.Increment(ref _eventLostCount);
// A new "Lost Event" monitoring error must be sent once.
_overloadedErrorWaiting = true;
result = false;
}
Interlocked.MemoryBarrier();
}
// Whatever happens, if a "Lost Event" monitoring error must be send once,
// checks to see if we must send it now.
Interlocked.MemoryBarrier();
if (_overloadedErrorWaiting)
{
var now = receiver != null ? e.Entry.LogTime.TimeUtc : DateTime.MaxValue;
if (now > _nextCapacityError)
{
// Double check locking.
lock ( _overloadLock )
{
if (_overloadedErrorWaiting && now > _nextCapacityError)
{
ActivityMonitor.CriticalErrorCollector.Add(new CKException("GrandOutput dispatcher overload. Lost {0} total events.", _eventLostCount), null);
if (receiver != null)
{
_nextCapacityError = now.Add(_delayBetweenCapacityError);
}
_overloadedErrorWaiting = false;
}
}
}
}
return(result);
}
