public void Enqueue(BaseWoopsaSubscriptionServiceSubscription subscription, IWoopsaNotification notification,
out bool itemDiscarded)
{
PairSubscriptionNotification pair = new PairSubscriptionNotification(subscription, notification);
lock (_notifications)
{
if (subscription.MonitorInterval == WoopsaSubscriptionServiceConst.MonitorIntervalLastPublishedValueOnly)
{
// remove any existing notification from this subscription, as we want to keep only the last
LinkedListNode <PairSubscriptionNotification> node = _notifications.First;
while (node != null)
{
var next = node.Next;
if (node.Value.Key == subscription)
{
_notifications.Remove(node);
}
node = next;
}
}
itemDiscarded = _notifications.Count >= MaxQueueSize;
if (itemDiscarded)
{
while (_notifications.Count >= MaxQueueSize)
{
_notifications.RemoveFirst();
}
}
_notifications.AddLast(pair);
}
}
public CanWatchEventArgs(
BaseWoopsaSubscriptionServiceSubscription subscription, IWoopsaProperty itemProperty)
{
Subscription = subscription;
ItemProperty = itemProperty;
CanWatch = WoopsaSubscriptionServiceImplementation.
CanWatchDefaultValue;
}
internal bool OnCanWatch(BaseWoopsaSubscriptionServiceSubscription subscription, IWoopsaProperty itemProperty)
{
if (CanWatch != null)
{
CanWatchEventArgs e = new
CanWatchEventArgs(subscription, itemProperty);
CanWatch(this, e);
return(e.CanWatch);
}
else
{
return(CanWatchDefaultValue);
}
}
internal void SubscriptionPublishNotifications(
BaseWoopsaSubscriptionServiceSubscription subscription,
List <IWoopsaNotification> notifications)
{
foreach (var notification in notifications)
{
bool itemDiscarded;
_lastNotificationId++;
if (_lastNotificationId >= WoopsaSubscriptionServiceConst.MaximumNotificationId)
{
_lastNotificationId = WoopsaSubscriptionServiceConst.MinimumNotificationId;
}
notification.Id = _lastNotificationId;
_pendingNotifications.Enqueue(subscription, notification, out itemDiscarded);
if (itemDiscarded)
{
_notificationsLost = true;
}
}
_waitNotificationEvent.Set();
}
public void Enqueue(BaseWoopsaSubscriptionServiceSubscription subscription, IWoopsaNotification notification,
out bool itemDiscarded)
{
PairSubscriptionNotification pair = new PairSubscriptionNotification(subscription, notification);
lock (_notifications)
{
if (subscription.MonitorInterval == WoopsaSubscriptionServiceConst.MonitorIntervalLastPublishedValueOnly)
{
// remove any existing notification from this subscription, as we want to keep only the last
LinkedListNode<PairSubscriptionNotification> node = _notifications.First;
while (node != null)
{
var next = node.Next;
if (node.Value.Key == subscription)
_notifications.Remove(node);
node = next;
}
}
itemDiscarded = _notifications.Count >= MaxQueueSize;
if (itemDiscarded)
while (_notifications.Count >= MaxQueueSize)
_notifications.RemoveFirst();
_notifications.AddLast(pair);
}
}
internal void SubscriptionPublishNotifications(
BaseWoopsaSubscriptionServiceSubscription subscription,
List<IWoopsaNotification> notifications)
{
foreach (var notification in notifications)
{
bool itemDiscarded;
_lastNotificationId++;
if (_lastNotificationId >= WoopsaSubscriptionServiceConst.MaximumNotificationId)
_lastNotificationId = WoopsaSubscriptionServiceConst.MinimumNotificationId;
notification.Id = _lastNotificationId;
_pendingNotifications.Enqueue(subscription, notification, out itemDiscarded);
if (itemDiscarded)
_notificationsLost = true;
}
_waitNotificationEvent.Set();
}
private bool OnCanWatch(
BaseWoopsaSubscriptionServiceSubscription subscription,
IWoopsaProperty itemProperty)
{
return(Channel.OnCanWatch(subscription, itemProperty));
}
internal bool OnCanWatch(BaseWoopsaSubscriptionServiceSubscription subscription, IWoopsaProperty itemProperty)
{
return(ServiceImplementation.OnCanWatch(subscription, itemProperty));
}
