reactor/reactor-netty

Health v2 · maintenance only

Adoption not part of the score

2778 stars · 700 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Reactor Netty is a JVM library providing non-blocking, backpressure-ready TCP, HTTP, UDP, and QUIC clients and servers built on the Netty framework, using Project Reactor's Flux and Mono reactive types. It serves as the network engine underlying Spring WebFlux and other reactive JVM applications.

Use cases

• build a non-blocking HTTP server in Java
• make reactive HTTP client requests with backpressure
• implement TCP or UDP clients and servers on the JVM
• add QUIC support to a reactive application
• build reactive microservices with Spring WebFlux
• stream data over WebSockets reactively

When to choose

• you need non-blocking, backpressure-ready network I/O on the JVM
• you are building reactive applications with Project Reactor or Spring WebFlux
• you need fine-grained control over Netty with a reactive API
• you need HTTP, TCP, UDP, or QUIC clients and servers in one library

When to avoid

• you want a simple blocking HTTP client or server
• your team is unfamiliar with reactive programming and the learning cost outweighs benefits
• you are not on the JVM or don't use Java 8+
• you need a full web framework rather than a network layer

Facets

library · maturity active

http-client http-server websocket networking concurrency backend web-development networking microservices developer-tools jvm cross-platform reactive-streams netty non-blocking-io backpressure quic tcp udp flux mono spring-webflux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="reactor/reactor-netty")