Emitted: 0
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Order Service
Producer
One event β every subscriber gets a copy. Watch all lanes light up together.
What just happened
- βΉQueue (competing consumers): each event is handled by exactly ONE worker β perfect for distributing background jobs.
- βΉTopic (pub/sub): every subscriber gets its OWN copy of the event β perfect for fan-out to Email, CRM, Analytics, Auditβ¦
- βΉAdd a WhatsApp subscriber live: it just starts receiving OrderPlaced. The producer never changed β that's loose coupling.