Word Count Per Record

Kafka application WordCountPerLineApp (using Kafka Producer and Consumer APIs) that does the following:

1. Consumes records from a topic, e.g. input
2. Counts words (in the value of a record)
3. Produces records with the unique words and their occurences (counts)
   • A record key -> hello hello world gives a record with the following value hello -> 2, world -> 1 (and the same key as in the input record)
4. (EXTRA) Produces as many records as there are unique words in the input record with their occurences (counts)
   • A record key -> hello hello world gives two records in the output, i.e. (hello, 2) and (world, 1) (as (key, value))

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Credits: kafka-workshop