messagebroker

Does Spring @SubscribeMapping really subscribe the client to some topic?

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By default the return value from an @SubscribeMapping method is sent as a message directly back to the connected client and does not pass through the broker. (emphasis mine) Here the Spring Framework documentation is describing what happens with the response message, not the incoming SUBSCRIBE message. So to answer your questions: yes, the client … Read more

What’s the purpose of Kafka’s key/value pair-based messaging?

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Kafka uses the abstraction of a distributed log that consists of partitions. Splitting a log into partitions allows to scale-out the system. Keys are used to determine the partition within a log to which a message get’s appended to. While the value is the actual payload of the message. The examples are actually not very … Read more