Reactor Netty

TCP/HTTP/UDP/QUIC client/server with Reactor over Netty
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Reactor Netty

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Reactor Netty

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Reactor Netty offers non-blocking and backpressure-ready TCP/HTTP/UDP/QUIC clients & servers based on Netty framework.

Getting it

Reactor Netty requires Java 8 or + to run.

With Gradle from or Maven Central repositories (stable releases only):

    repositories {
      //maven { url '' }
      maven { url '' }

    dependencies {
      //compile "io.projectreactor.netty:reactor-netty-core:1.1.14-SNAPSHOT"
      compile "io.projectreactor.netty:reactor-netty-core:1.1.13"
      //compile "io.projectreactor.netty:reactor-netty-http:1.1.14-SNAPSHOT"
      compile "io.projectreactor.netty:reactor-netty-http:1.1.13"

See the Reference documentation for more information on getting it (eg. using Maven, or on how to get milestones and snapshots).

Getting Started

New to Reactor Netty? Check this Reactor Netty Workshop and the Reference documentation

Here is a very simple HTTP server and the corresponding HTTP client example

HttpServer.create()   // Prepares an HTTP server ready for configuration
          .port(0)    // Configures the port number as zero, this will let the system pick up
                      // an ephemeral port when binding the server
          .route(routes ->
                      // The server will respond only on POST requests
                      // where the path starts with /test and then there is path parameter
        "/test/{param}", (request, response) ->
                                                     .map(s -> s + ' ' + request.param("param") + '!')
          .bindNow(); // Starts the server in a blocking fashion, and waits for it to finish its initialization
HttpClient.create()             // Prepares an HTTP client ready for configuration
          .port(server.port())  // Obtains the server's port and provides it as a port to which this
                                // client should connect
          .post()               // Specifies that POST method will be used
          .uri("/test/World")   // Specifies the path
          .send(ByteBufFlux.fromString(Flux.just("Hello")))  // Sends the request body
          .responseContent()    // Receives the response body

Getting help

Having trouble with Reactor Netty? We'd like to help!

Reporting Issues

Reactor Netty uses GitHubs integrated issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:

  • Before you log a bug, please search the issue tracker to see if someone has already reported the problem.
  • If the issue doesn't already exist, create a new issue.
  • Please provide as much information as possible with the issue report, we like to know the version of Reactor Netty that you are using, as well as your Operating System and JVM version.
  • If you want to raise a security vulnerability, please review our Security Policy for more details.


See our Contributing Guide for information about contributing to Reactor Netty.

Building from Source

You don't need to build from source to use Reactor Netty (binaries in, but if you want to try out the latest and greatest, Reactor Netty can be easily built with the gradle wrapper. You also need JDK 1.8.

$ git clone
$ cd reactor-netty
$ ./gradlew build

If you want to publish the artifacts to your local Maven repository use:

$ ./gradlew publishToMavenLocal




Reactor Netty is Open Source Software released under the Apache License 2.0

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