From: Kai Moritz <kai@juplo.de>
Date: Sat, 4 Feb 2023 09:20:55 +0000 (+0100)
Subject: Switched to `JsonSerializer` / `JsonDeserializer`
X-Git-Tag: wordcount-2.0.0
X-Git-Url: https://juplo.de/gitweb/?a=commitdiff_plain;h=c9407ccc5b4721cbeba19c8682568a99701bb98f;hp=c9407ccc5b4721cbeba19c8682568a99701bb98f;p=demos%2Fkafka%2Fwordcount

Switched to `JsonSerializer` / `JsonDeserializer`

* Switched all services from manual serialization/deserialization with
  direct calls to the `ObjectMapper` to ``JsonSerializer`` /
  ``JsonDeserializer``.
* All keys and values are serialized as JSON (expect the key from `users`).
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