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eclipse-vertx/vert.x

Vert.x is a tool-kit for building reactive applications on the JVM
Source code at GitHub http://vertx.io
eclipse-vertx/vert.x.json
{
  "createdAt": "2011-06-17T14:54:55Z",
  "defaultBranch": "master",
  "description": "Vert.x is a tool-kit for building reactive applications on the JVM",
  "fullName": "eclipse-vertx/vert.x",
  "homepage": "http://vertx.io",
  "language": "Java",
  "name": "vert.x",
  "pushedAt": "2025-11-25T13:46:49Z",
  "stargazersCount": 14607,
  "topics": [
    "concurrency",
    "event-loop",
    "high-performance",
    "http2",
    "java",
    "jvm",
    "netty",
    "nio",
    "non-blocking",
    "reactive",
    "vertx"
  ],
  "updatedAt": "2025-11-26T20:21:36Z",
  "url": "https://github.com/eclipse-vertx/vert.x"
}

Build Status (5.x) Build Status (4.x)

Vert.x Core

Section titled “Vert.x Core”

This is the repository for Vert.x core.

Vert.x core contains fairly low-level functionality, including support for HTTP, TCP, file system access, and various other features. You can use this directly in your own applications, and it’s used by many of the other components of Vert.x.

For more information on Vert.x and where Vert.x core fits into the big picture please see the website.

Building Vert.x artifacts

Section titled “Building Vert.x artifacts”
> mvn package

Running tests

Section titled “Running tests”

Runs the tests

> mvn test

Tests can be run with specified HTTP port and/or HTTPS port.

> mvn test -Dvertx.httpPort=8888 -Dvertx.httpsPort=4044

Vert.x supports native transport on BSD and Linux, to run the tests with native transport

> mvn test -PNativeEpoll
> mvn test -PNativeIoUring
> mvn test -PNativeKQueue

Vert.x supports domain sockets on Linux exclusively, to run the tests with domain sockets

> mvn test -PNativeEpoll+DomainSockets

Vert.x has integrations tests that run a differently configured JVM (classpath, system properties, etc…)

> vertx verify -Dtest=FooTest # FooTest does not exists, its only purpose is to execute no tests during the test phase

Building documentation

Section titled “Building documentation”
> mvn package -Pdocs -DskipTests

Open target/docs/vertx-core/java/index.html with your browser