Enterprise Service Bus (Java, Spring Boot, RabbitMQ, Redis, PostgreSQL, Docker) overview

A message-oriented middleware backbone that routes, transforms, and orchestrates enterprise service calls across dozens of internal systems. Spring Boot microservices expose REST and AMQP endpoints, with RabbitMQ handling reliable asynchronous messaging between bounded contexts. Redis provides distributed caching for canonical data lookups and idempotency keys, while PostgreSQL stores routing rules, message audit trails, and dead-letter metadata. Docker containers enable consistent deployment across on-premise and cloud environments. The tradeoff is operational complexity in managing exchange topologies and ensuring exactly-once delivery semantics across heterogeneous backends.