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Build a production-oriented Spring Cloud Gateway on Spring Boot 4 with compatible dependencies, reactive routing, JWT security, timeouts, circuit breakers, rate limiting, and a maintainable BFF composition boundary.
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- Published on
Design a multi-region backend with explicit RTO and RPO targets, single-writer PostgreSQL failover, independent regional Kafka clusters, controlled traffic recovery, and testable disaster-recovery runbooks.- Published on
Learn where Kafka exactly-once semantics stop, why database side effects still need idempotency, and how to combine a PostgreSQL outbox with an idempotent Spring Kafka consumer.- Published on
Build a stateful Kafka Streams application with event-time windows, local RocksDB stores, changelog recovery, exactly-once Kafka processing, and an idempotent PostgreSQL materialized view.- Published on
Use Redisson locks safely in Spring Boot by choosing the right transaction boundary, understanding watchdog and lease behavior, enforcing idempotency, and adding fencing tokens for stale lock holders.