Service Interoperability With gRPC
summary
Built a Last Known Good Artifact service that validates compatible artifact versions and serves polyglot clients in Java and Python via gRPC + Protobuf; server generates idiomatic client stubs, uses Java Spring Boot grpc libraries, and supports unary and streaming RPCs with speculative retries to reduce timeouts and improve latency. Authentication uses a dynamic auth service issuing short‑lived certificates and native mTLS. Plan to move to reactive gRPC (Flux) for backpressure; rollout required running both old and new services in parallel and one stubborn client needed one‑on‑one migration.
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