John Roesler created KAFKA-13117:
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             Summary: After processors, migrate TupleForwarder and 
CacheFlushListener
                 Key: KAFKA-13117
                 URL: https://issues.apache.org/jira/browse/KAFKA-13117
             Project: Kafka
          Issue Type: Sub-task
            Reporter: John Roesler


Currently, both of these interfaces take plain values in combination with 
timestamps:

CacheFlushListener:
{code:java}
void apply(K key, V newValue, V oldValue, long timestamp)
{code}
TimestampedTupleForwarder
{code:java}
 void maybeForward(K key,
                   V newValue,
                   V oldValue,
                   long timestamp){code}
These are internally translated to the new PAPI, but after the processors are 
migrated, there won't be a need to have this translation. We should update both 
of these APIs to just accept {{Record<K, Change<V>>}}.



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