private void OnEvent(Subscription subscription, EventNotificationList notification, IList <string> stringTable)
{
if (!Object.ReferenceEquals(subscription, m_subscription))
{
return;
}
if (this.InvokeRequired)
{
this.BeginInvoke(new FastEventNotificationEventHandler(OnEvent), subscription, notification, stringTable);
return;
}
try
{
foreach (EventFieldList e in notification.Events)
{
EventsCTRL.DisplayEvent(e);
}
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
/// <see cref="BaseListCtrl.UpdateItem" />
protected override void UpdateItem(ListViewItem listItem, object item)
{
ItemData itemData = item as ItemData;
if (itemData == null)
{
base.UpdateItem(listItem, item);
return;
}
listItem.SubItems[0].Text = String.Format("{0}", itemData.Subscription.DisplayName);
listItem.SubItems[1].Text = String.Format("{0}", itemData.NotificationMessage.SequenceNumber);
listItem.SubItems[2].Text =
String.Format("{0:HH:mm:ss.fff}", itemData.NotificationMessage.PublishTime.ToLocalTime());
int events = 0;
int datachanges = 0;
int notifications = 0;
foreach (ExtensionObject notification in itemData.NotificationMessage.NotificationData)
{
notifications++;
if (ExtensionObject.IsNull(notification))
{
continue;
}
DataChangeNotification datachangeNotification = notification.Body as DataChangeNotification;
if (datachangeNotification != null)
{
datachanges += datachangeNotification.MonitoredItems.Count;
}
EventNotificationList EventNotification = notification.Body as EventNotificationList;
if (EventNotification != null)
{
events += EventNotification.Events.Count;
}
}
listItem.SubItems[3].Text = String.Format("{0}", notifications);
listItem.SubItems[4].Text = String.Format("{0}", datachanges);
listItem.SubItems[5].Text = String.Format("{0}", events);
listItem.Tag = item;
}
/// <summary>
/// Returns the events contained in the notification message.
/// </summary>
public IList <EventFieldList> GetEvents(bool reverse)
{
List <EventFieldList> events = new List <EventFieldList>();
foreach (ExtensionObject extension in m_notificationData)
{
if (ExtensionObject.IsNull(extension))
{
continue;
}
EventNotificationList notification = extension.Body as EventNotificationList;
if (notification == null)
{
continue;
}
if (reverse)
{
for (int ii = notification.Events.Count - 1; ii >= 0; ii--)
{
EventFieldList eventFields = notification.Events[ii];
if (eventFields != null)
{
eventFields.Message = this;
events.Add(eventFields);
}
}
}
else
{
for (int ii = 0; ii < notification.Events.Count; ii++)
{
EventFieldList eventFields = notification.Events[ii];
if (eventFields != null)
{
eventFields.Message = this;
events.Add(eventFields);
}
}
}
}
return(events);
}
/// <see cref="BaseListCtrl.UpdateItem" />
protected override void UpdateItem(ListViewItem listItem, object item)
{
ItemData itemData = item as ItemData;
if (itemData == null)
{
base.UpdateItem(listItem, item);
return;
}
int events = 0;
int datachanges = 0;
int notifications = 0;
foreach (ExtensionObject notification in itemData.NotificationMessage.NotificationData)
{
notifications++;
if (ExtensionObject.IsNull(notification))
{
continue;
}
DataChangeNotification datachangeNotification = notification.Body as DataChangeNotification;
if (datachangeNotification != null)
{
datachanges += datachangeNotification.MonitoredItems.Count;
}
EventNotificationList EventNotification = notification.Body as EventNotificationList;
if (EventNotification != null)
{
events += EventNotification.Events.Count;
}
}
listItem.Tag = item;
}
/// <summary>
/// Construct a message from the queues.
/// </summary>
private NotificationMessage ConstructMessage(
Queue<EventFieldList> events,
Queue<MonitoredItemNotification> datachanges,
Queue<DiagnosticInfo> datachangeDiagnostics,
out int notificationCount)
{
notificationCount = 0;
NotificationMessage message = new NotificationMessage();
message.SequenceNumber = (uint)m_sequenceNumber;
message.PublishTime = DateTime.UtcNow;
Utils.IncrementIdentifier(ref m_sequenceNumber);
lock (m_diagnostics)
{
m_diagnostics.NextSequenceNumber = (uint)m_sequenceNumber;
}
// add events.
if (events.Count > 0 && notificationCount < m_maxNotificationsPerPublish)
{
EventNotificationList notification = new EventNotificationList();
while (events.Count > 0 && notificationCount < m_maxNotificationsPerPublish)
{
notification.Events.Add(events.Dequeue());
notificationCount++;
}
message.NotificationData.Add(new ExtensionObject(notification));
}
// add datachanges (space permitting).
if (datachanges.Count > 0 && notificationCount < m_maxNotificationsPerPublish)
{
bool diagnosticsExist = false;
DataChangeNotification notification = new DataChangeNotification();
notification.MonitoredItems = new MonitoredItemNotificationCollection(datachanges.Count);
notification.DiagnosticInfos = new DiagnosticInfoCollection(datachanges.Count);
while (datachanges.Count > 0 && notificationCount < m_maxNotificationsPerPublish)
{
MonitoredItemNotification datachange = datachanges.Dequeue();
notification.MonitoredItems.Add(datachange);
DiagnosticInfo diagnosticInfo = datachangeDiagnostics.Dequeue();
if (diagnosticInfo != null)
{
diagnosticsExist = true;
}
notification.DiagnosticInfos.Add(diagnosticInfo);
notificationCount++;
}
// clear diagnostics if not used.
if (!diagnosticsExist)
{
notification.DiagnosticInfos.Clear();
}
message.NotificationData.Add(new ExtensionObject(notification));
}
return message;
}
private void OnEventNotification(Subscription subscription, EventNotificationList notification, IList<string> stringTable)
{
try
{
// check if disposed.
if (m_disposed)
{
return;
}
// check if session still active.
Session session = m_server.Session;
if (session == null || !session.Connected)
{
return;
}
// check if events are being reported.
if (m_callback == null)
{
return;
}
lock (m_lock)
{
foreach (EventFieldList e in notification.Events)
{
// translate the notification and send the response.
AeEvent e2 = m_filter.TranslateNotification(m_server.Session, e);
if (e2 != null)
{
// check if refresh has started.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshStartEventType)
{
m_refreshInProgress = true;
continue;
}
// check if refresh has ended.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshEndEventType)
{
m_refreshInProgress = false;
// turn off publishing if the subscription is not active,
if (!Active)
{
m_subscription.SetPublishingMode(false);
List<MonitoredItem> itemsToUpdate = new List<MonitoredItem>(m_notifiers.Values);
m_subscription.SetMonitoringMode(MonitoringMode.Disabled, itemsToUpdate);
}
if (m_refreshQueue != null)
{
ThreadPool.QueueUserWorkItem(DoRefresh, m_refreshQueue);
}
continue;
}
// cache any conditions requiring acknowledgement.
m_conditionManager.ProcessEvent(e2);
// queue on refresh.
if (m_refreshInProgress)
{
if (m_refreshQueue != null)
{
m_refreshQueue.Enqueue(e2);
}
continue;
}
// queue the event.
if (Active)
{
lock (m_queue)
{
m_queue.Enqueue(e2);
}
}
}
}
}
}
catch (Exception exception)
{
Utils.Trace(exception, "Error processing event callback.");
}
}
private void OnEvent(Subscription subscription, EventNotificationList notification, IList<string> stringTable)
{
if (!Object.ReferenceEquals(subscription, m_subscription))
{
return;
}
if (this.InvokeRequired)
{
this.BeginInvoke(new FastEventNotificationEventHandler(OnEvent), subscription, notification, stringTable);
return;
}
try
{
foreach (EventFieldList e in notification.Events)
{
EventsCTRL.DisplayEvent(e);
}
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
/// <summary>
/// The delegate used to receive event notifications via a direct function call instead of a .NET Event.
/// </summary>
public void OnEventNotification(Opc.Ua.Client.Subscription subscription, EventNotificationList notification, IList<string> stringTable)
{
for (int ii = 0; ii < notification.Events.Count; ii++)
{
MonitoredItem localItem = null;
EventFieldList e = null;
lock (subscription.Session)
{
Opc.Ua.Client.MonitoredItem monitoredItem = subscription.FindItemByClientHandle(notification.Events[ii].ClientHandle);
if (monitoredItem != null)
{
e = notification.Events[ii];
for (int jj = 0; jj < e.EventFields.Count; jj++)
{
e.EventFields[jj] = m_mapper.ToLocalVariant(e.EventFields[jj]);
}
localItem = (MonitoredItem)monitoredItem.Handle;
e.ClientHandle = localItem.ClientHandle;
}
}
localItem.QueueEvent(e);
}
}
private void OnEventNotification(Subscription subscription, EventNotificationList notification, IList <string> stringTable)
{
try
{
// check if disposed.
if (m_disposed)
{
return;
}
// check if session still active.
Session session = m_server.Session;
if (session == null || !session.Connected)
{
return;
}
// check if events are being reported.
if (m_callback == null)
{
return;
}
lock (m_lock)
{
foreach (EventFieldList e in notification.Events)
{
// translate the notification and send the response.
AeEvent e2 = m_filter.TranslateNotification(m_server.Session, e);
if (e2 != null)
{
// check if refresh has started.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshStartEventType)
{
m_refreshInProgress = true;
continue;
}
// check if refresh has ended.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshEndEventType)
{
m_refreshInProgress = false;
// turn off publishing if the subscription is not active,
if (!Active)
{
m_subscription.SetPublishingMode(false);
List <MonitoredItem> itemsToUpdate = new List <MonitoredItem>(m_notifiers.Values);
m_subscription.SetMonitoringMode(MonitoringMode.Disabled, itemsToUpdate);
}
if (m_refreshQueue != null)
{
ThreadPool.QueueUserWorkItem(DoRefresh, m_refreshQueue);
}
continue;
}
// cache any conditions requiring acknowledgement.
m_conditionManager.ProcessEvent(e2);
// queue on refresh.
if (m_refreshInProgress)
{
if (m_refreshQueue != null)
{
m_refreshQueue.Enqueue(e2);
}
continue;
}
// queue the event.
if (Active)
{
lock (m_queue)
{
m_queue.Enqueue(e2);
}
}
}
}
}
}
catch (Exception exception)
{
Utils.Trace(exception, "Error processing event callback.");
}
}
