Integration Patterns.

Distributed systems patterns for reliable cross-service integrations. Covers 8 sub-skills.

• Integration Patterns · 1 of 3

  Webhook Patterns

  What content type do most webhook providers use for their payloads?

  Aapplication/jsonBapplication/xmlCtext/plainDmultipart/form-data

• Integration Patterns · 2 of 3

  API Composition & BFF

  Your API gateway aggregates responses from 4 microservices. One service goes down. What pattern prevents the entire aggregated response from failing?

  ACircuit breaker with graceful degradation, returning partial dataBRoute all traffic to the remaining 3 services using consistent hashingCCache the last successful response from each service permanentlyDRetry the failing service indefinitely until it responds

• Integration Patterns · 3 of 3

  API Composition & BFF

  Three microservices each have 99.9% uptime. An API gateway that requires all three to respond has approximately what uptime?

  A33.3%: each service contributes a third of the availabilityB99.97%: the mean of the three individual availabilitiesC99.9%: the gateway inherits the highest single availabilityD99.7%: the product of the three individual availabilities