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Details in Choreography pattern - Azure Architecture Center | Microsoft Learn |
Problem
Adding or removing services without breaking existing logic. and, so create a centralized service which is the entry point to multiple services for incoming requests.
Make sure that each service completes their responsability and is not aware of the overall workflow.
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Solution
The goal is to buffer requests until downstream components claim and process them.
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A message broker could be the solution to buffer requests from client app : messages will be queued in the message broker.
Choreography In Practice
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The design ensures the choreography to occur in a sequence.
To avoid cascading retry operations that might lead to multiple efforts, business services should immediately flag unacceptable messages. It's possible to enrich such messages using well-known reason codes or a defined application code, so it can be moved to a dead letter queue (DLQ).