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September 19, 2013
15:49, EEST
Forum Posts: 7
Member Since:
September 19, 2013
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Hello everyone,

I try to write a data server, that subscribes to data from an OPC UA Server and push this data to another client.

In the SubscriptionNotificationListener the function onDataChange(…) is called for every MonitoredDataItem individually, but my aim is to call one function for all MonitoredDataItems that changed in the PublishingInterval, like the onNotificationData(…) function. I tried this function, but I only get the values and can’t match the values to the MonitoredItems they refer. Is there a function or a way to get a list of changed MonitoredDataItems after each PublishingInterval? I didn’t find a way until now.

I hope my problem is understandable.

Kind regards,

September 20, 2013
11:19, EEST
Jouni Aro
Forum Posts: 846
Member Since:
December 21, 2011
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Try this:

				if (notificationData instanceof DataChangeNotification) {
					DataChangeNotification dataChangeNotification = (DataChangeNotification) notificationData;
					for (MonitoredItemNotification notification : dataChangeNotification
							.getMonitoredItems()) {
						MonitoredDataItem item;
						try {
							item = (MonitoredDataItem) Subscription.getItem(notification
September 20, 2013
11:49, EEST
Forum Posts: 7
Member Since:
September 19, 2013
sp_UserOfflineSmall Offline

Hey Jouni Aro,

A thousand thanks! Didn’t found the function in the Subscription.
Thank you for your advise. Wink

Regards, jakblu

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