Subtracts the current Value from the previous one.
| VAR | Default | Desc |
|---|---|---|
| CONFIG_APPLICATION_ID | operator-value-diff | Application ID |
| CONFIG_BOOTSTRAP_SERVERS | Queried from zookeeper | List of kafka brokers, optional if ZK_Quorum is given |
| ZK_QUORUM | localhost:2181 | zookeeper instances |
| KAFKA_TOPIC | input-stream | inputstream name |
| KAFKA_OUTPUT | output-stream | outputstream name |
| INPUT_VALUE | value | The input value to be diffed |
| OUTPUT_DIFF | diff | The difference between two values |