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Module 6

Reactive & Messaging

Non-blocking apps and event-driven systems.

Handle huge concurrency without a thread per request, and let services talk through events. Project Reactor, Spring WebFlux, R2DBC, async and scheduling, application events, and messaging with Kafka and RabbitMQ.

7 Lessons in this stage1 h 50 min
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Lessons in this stage

  1. 01

    Reactive Programming & Reactor

    Advanced

    Why non-blocking matters, and the two publisher types at the heart of it: Mono (0-1) and Flux (0-N).

    18 min
  2. 02

    Spring WebFlux

    Advanced

    The reactive web stack: controllers that return Mono/Flux and handle massive concurrency on few threads.

    16 min
  3. 03

    Reactive Data with R2DBC

    Advanced

    Talking to a database without blocking, so the whole request pipeline stays reactive end to end.

    14 min
  4. 04

    Async & Scheduling

    Intermediate

    Run work off the request thread with @Async, and run jobs on a timer with @Scheduled.

    14 min
  5. 05

    Application Events

    Intermediate

    Decouple components in-process by publishing and listening for events - the gateway to event-driven design.

    16 min
  6. 06

    Messaging with Kafka

    Advanced

    Durable, high-throughput event streaming between services with Spring for Apache Kafka.

    18 min
  7. 07

    Messaging with RabbitMQ

    Advanced

    Flexible message routing with a broker and Spring AMQP - queues, exchanges, and when to choose it over Kafka.

    14 min

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