Comments (4)
Look at subscription in example client. Let me know if it works with kepware
On Wed, Jul 1, 2015, 07:53 kashp [email protected] wrote:
Hi oroulet
I am connecting kepserver with python using python-opcua
I am polling the server for tag value change, Is there any event
registration mechanism so that my python function triggered automatically
as the tag value will changeThanks
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#11.
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Thanks oroulet its working thanks,
I have one more doubt, lets suppose i have registered 180 tags
like this
sub.subscribe_data_change(myvar)
data_change(self, handle, node, val, attr) will be executed upon event receive.
If all tags changed then this function will be called in parallel or sequential
????
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In current implementation there is only one thread calling callbacks so all
calls will be sequential s. One could implement a thread pool but in
python, which is anyway monoprocess, I am not sure it would help anything
On Thu, Jul 2, 2015, 07:40 kashp [email protected] wrote:
Thanks oroulet its working thanks,
I have one more doubt, lets suppose i have registered 180 tags
like this
sub.subscribe_data_change(myvar)data_change(self, handle, node, val, attr) will be executed upon event
receive.
If all tags changed then this function will be called in parallel or
sequential
????—
Reply to this email directly or view it on GitHub
#11 (comment)
.
from python-opcua.
One planned improvement is to allow subscriptions to many tags at once...
But not done yet
On Thu, Jul 2, 2015, 13:49 Olivier Roulet-Dubonnet [email protected]
wrote:
In current implementation there is only one thread calling callbacks so
all calls will be sequential s. One could implement a thread pool but in
python, which is anyway monoprocess, I am not sure it would help anythingOn Thu, Jul 2, 2015, 07:40 kashp [email protected] wrote:
Thanks oroulet its working thanks,
I have one more doubt, lets suppose i have registered 180 tags
like this
sub.subscribe_data_change(myvar)data_change(self, handle, node, val, attr) will be executed upon event
receive.
If all tags changed then this function will be called in parallel or
sequential
????—
Reply to this email directly or view it on GitHub
#11 (comment)
.
from python-opcua.
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