- Published on
Plan an expand-migrate-contract rollout for PostgreSQL and Kafka with compatible Spring Boot deployments, chunked backfills, transactional outbox or CDC, validation gates, and safe cleanup.
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- Published on
Instrument a Spring Boot service with Prometheus metrics, native structured logging, OpenTelemetry tracing over OTLP, safe cardinality rules, and a practical Grafana observability workflow.- Published on
Persist external-call intent with business data, claim work safely across replicas, classify retries, handle ambiguous HTTP outcomes, and use Kafka only through a durable outbox or CDC boundary.- Published on
Design a reliable cache-aside flow with PostgreSQL as the source of truth, durable Kafka change events, correct consumer-group topology, version-aware Redis invalidation, TTL fallback, and protection against stale cache refills.- Published on
Choose a tenant-isolation model, derive tenant identity from authenticated claims, use Hibernate tenant filtering with PostgreSQL row-level security, and test every path that can cross tenant boundaries.