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Spring Boot 4 Microservices & REST APIs · Lesson

Backpressure and Operators

Transform and control reactive streams.

Operators Build Pipelines

Reactive operators chain together to form a processing pipeline. Each operator returns a new publisher describing the next step.

Common ones: map, flatMap, filter, take, buffer.

map vs flatMap

map transforms each item synchronously (1-to-1). flatMap transforms each item into another publisher and flattens the results — use it for async work.

All lessons in this course

  1. Mono and Flux Basics
  2. Reactive Controllers
  3. WebClient for Reactive Calls
  4. Backpressure and Operators
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