This processor measures how long a value of a string field does not change. Once the value is changes the event with the measured time and the corresponding string value is emitted.
A string field is required in the data stream.
The string field which is monitored for any value changes.
Define when an event should be emitted, either on each input event or just when the string value changes.
The following two fields are appended to the event:
The event is emitted whenever the value of the string field changes.