private void AssignDeliveryMessages()
{
OperationContext context = new OperationContext();
int runCount = 0;
while (true)
{
if (runCount++ > 200)
{
_hadPendingWork = true;
break; //to prevent starvation and let other operations happen
}
var message = _store.GetNextUndeliveredMessage(TimeSpan.MaxValue, context);
if (message != null)
{
SubscriptionInfo subscription = null;
subscription = _store.GetSubscriber(message.Topic, SubscriptionType.Publisher, context);
if (subscription == null)
{
IList <MessageInfo> messages = new List <MessageInfo>()
{
message
};
_store.RemoveMessages(messages, MessageRemovedReason.Removed, context);
continue;
}
_store.AssignmentOperation(message, subscription, TopicOperationType.AssignSubscription, new OperationContext());
}
else
{
break;
}
}
}
private void RevokeExpiredAssignments()
{
OperationContext context = new OperationContext();
if (DateTime.Now < _expirationTimestamp.AddSeconds(10))
{
return;
}
IList <MessageInfo> unacknowledgedMessages = _store.GetUnacknowledgeMessages(new TimeSpan(0, 0, 20));
int runCount = 0;
foreach (MessageInfo message in unacknowledgedMessages)
{
_store.AssignmentOperation(message, null, TopicOperationType.RevokeAssignment, new OperationContext());
if (runCount++ > 200)
{
_hadPendingWork = true;
break; //to prevent starvation and let other operations happen
}
}
_expirationTimestamp = DateTime.Now;
}
