Skip to main content
Version: Next

String Counter


Description

This processor monitors a string field and counts how often the value of the string changes. Hereby, a change is characterized by the value of the field before and the value after the change, combined forming a pair. The processor keeps track of the counter for each pair.


Required input

A string field is required in the data stream and can be selected with the field mapping.

String Field

The string field to be monitored.


Configuration

(no further configuration required)

Output

The following three fields are appended to the event:

  • [counter] numerical field with the current count value for the given value pair
  • [change_from] the value of the string before the change
  • [change_to] the value of the string after the change

The event is emitted whenever the value of the string field changes.