Part 8
3 chapters
Communication & Contracts
REST/gRPC/GraphQL (+ order extraction & gateway, strangler completes), the Quarkus/MicroProfile chassis, the schema/API/service registry.
Chapter 26
Communication Styles & Extraction 6 — Order + GraphQL Gateway
REST, gRPC, async sagas, and GraphQL aggregation side by side; the god order aggregate extracted last into a CQRS write/read split; the strangler completes and the monolith is decommissioned.
Chapter 27
The Quarkus / MicroProfile Chassis
Config, Fault Tolerance, Health, Metrics, OpenAPI, REST Client, JWT; build-time optimization, native image, and the dev-mode inner loop.
Chapter 28
Contracts & the Service Registry
Schema/API/shared-data-type registry use cases and enterprise requirements; Apicurio with Avro/Protobuf/JSONSchema/OpenAPI/AsyncAPI.