Imagine you’ve got a stream of data; it’s not “big data,” but it’s certainly a lot. Within the data, you’ve got some bits you’re interested in, and of those bits, you’d like to be able to query information about them at any point. Sounds fun, right?
What if you didn’t need any datastore other than Apache Kafka itself to be able to do this? What if you could ingest, filter, enrich, aggregate, and query data with just Kafka? With ksqlDB we can do just this, and I want to show you exactly how, using a Telegram bot as the application looking up state from the inbound stream of events:
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