Memorized Dynamic Attribute

Development Java
1

Hello TANGO Experts,

Consider a scenario, in which there is a need to create and remove attributes, which are memorized, upon invocation of a command.

When a memorized attribute is created dynamically upon invocation of a command, it’s value is not fetched from the database. But, if it is created in init_device() method, then the value gets fetched from the database.

Attached is a rudimentary Java Device to check the same. It contains command CreateDynAttr to create dynamic attributes, and command DeleteDynAttr to remove dynamic attributes. Dynamic attributes are also created inside init_device() method.

What is the way to enforce the fetching of the memorized value from the database for a TANGO attribute?

Regards,
Vatsal Trivedi

2

Hello Vatsal,

You are right, it does not work. The memorized values are only fetch at init. Sorry, there is no workaround.
We have to fix this issue:

Best Regards,

Gwenaëlle Abeillé
Synchrotron SOLEIL

3

Hi Gwenaëlle,

Thanks for taking a note of this. I found that this issue is already reported by someone else on the TANGO forum. Below is the link to the earlier discussion:
http://www.tango-controls.org/community/forum/c/development/java/memorised-dynamic-attribute/

Regards,
Vatsal Trivedi