Communication track

What it covers

• API Gateway One entry point that routes, secures and shapes client requests to the services behind it.
• Asynchronous Messaging Let services talk through a broker with commands and events instead of waiting on each other.
• Backend for Frontend Give each kind of client its own small backend, shaped for its screens and owned by its team.
• Idempotent Consumer Make processing the same message twice have the same effect as processing it once.
• Dead Letter Queue Move a message that keeps failing out of the way, so it stops blocking the rest and someone can look at it.
• Asynchronous Request-Reply Accept a long-running request right away, and let the client check back for the result.
• Access Token Relay Authenticate the user once at the edge, then pass a signed token along so each service can check it locally.