Skip to content

Message Passing - Junior

A producer sends a value; a consumer owns and processes it. They do not edit one shared object.

sequenceDiagram participant P as CDC reader participant Q as Queue participant W as Writer P->>Q: Change event Q->>W: Change event W->>W: Update owned batch

This separation simplifies reasoning, but a fast Debezium source can still fill an unbounded queue. Start with an immutable message, a bounded queue, one clear owner after send, and a defined action when full.

Continue to middle.md.

Test yourself

  1. How does message passing reduce shared-state races?
  2. What happens when the consumer is slower than the producer?
  3. Who owns a message after it is sent?