Dynamic Variables
The dynamic variables functionality enables dynamic configuration parameters.
Example
You have a QR-code scanner reading the QR-code placed on a product containing
the product ID. This parameter has to be stored in the database, and you want to tag it with additional
information from another system, in this case from a REST endpoint. So, the REST endpoint path has to be
changed each time, a new product was scanned (First scan: path=/api/products/12345 and second scan:
path=/api/products/54321).
This can be achieved by using the dynamic variables functionality, which links the value of
a configuration parameter to a value received from a variable.
For marking a dynamic variable, the following syntax has to be used:
Start Marker: ${
Syntax: module_id.key (for global data),
env.key (for environment variables), or local.key
(for local module data** - only for tag, processor, and output modules)
End Marker: }
You have to replace the placeholders with:
-
module_id: The id of the module whose data should be used. -
key: The key name whose data should be used.
** The current data object available in the according module.
Previous
Introduction
Introduction
Next
Buffering
Buffering