Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
Notify server when a client receives a NotificationMessage
December 6, 2016
9:38, EET
Avatar
reinhard
Member
Members
Forum Posts: 12
Member Since:
December 6, 2016
sp_UserOfflineSmall Offline

Is there any possibility (Listener, etc.) to get notified on the server side when a client has received a NotificationMessage (due to a subscription containing MonitioredEventItems) ?
We do not want to use Alarms and Conditions, we need a mechanism to notifiy the server implicitly whenever a subscription of a client has caused a notification to be sent on the server side (and the client received it).

December 7, 2016
15:49, EET
Avatar
Heikki Tahvanainen
Member
Members
Forum Posts: 402
Member Since:
April 17, 2013
sp_UserOfflineSmall Offline

Hello Reinhard,

Thank you for the question. Unfortunately the functionality that you described is not available in the Prosys OPC UA Java SDK.

In theory it would be possible to follow sequence numbers that the client sends back to the server and gather information about what events are received by different clients. However, this doesn’t sound like the most convenient or practical way. The purpose of the sequence numbers is that the Server may delete the Message with this sequence number from its retransmission queue.

As the OPC UA specification already contains acknowledgeable condition types, I would suggest that you just use those types.

Forum Timezone: Europe/Helsinki

Most Users Ever Online: 1919

Currently Online:
59 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

Heikki Tahvanainen: 402

hbrackel: 144

rocket science: 88

pramanj: 86

Francesco Zambon: 83

Ibrahim: 78

Sabari: 62

kapsl: 57

gjevremovic: 49

Xavier: 43

Member Stats:

Guest Posters: 0

Members: 730

Moderators: 7

Admins: 1

Forum Stats:

Groups: 3

Forums: 15

Topics: 1529

Posts: 6471

Newest Members:

HypromeImpupe, toneylapham544, rondawolinski7, Marypof5711, roycedelargie91, kourtneyquisenbe, ellis87832073466, zkxwilliemae, gabriellabachus, Deakin

Moderators: Jouni Aro: 1026, Pyry: 1, Petri: 0, Bjarne Boström: 1032, Jimmy Ni: 26, Matti Siponen: 349, Lusetti: 0

Administrators: admin: 1