https://github.com/zeromq/jeromq

JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.
https://github.com/zeromq/jeromq

dealerrouter jeromq libzmq messaging networking pubsub pushpull reqrep streaming zeromq

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JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.

• Host: GitHub
• URL: https://github.com/zeromq/jeromq
• Owner: zeromq
• License: mpl-2.0
• Created: 2012-08-01T09:28:37.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2024-11-06T17:56:33.000Z (about 1 month ago)
• Last Synced: 2024-12-09T14:09:41.266Z (12 days ago)
• Topics: dealerrouter, jeromq, libzmq, messaging, networking, pubsub, pushpull, reqrep, streaming, zeromq
• Language: Java
• Homepage: https://zeromq.org
• Size: 3.93 MB
• Stars: 2,371
• Watchers: 159
• Forks: 484
• Open Issues: 98
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Authors: AUTHORS

Awesome Lists containing this project

• awesome - zeromq/jeromq - Pure Java ZeroMQ (Java)
• awesome-java - JeroMQ - Implementation of ZeroMQ. (Projects / Messaging)

README

        

# JeroMQ

Pure Java implementation of libzmq (http://zeromq.org).

[![CircleCI](https://circleci.com/gh/zeromq/jeromq.svg?style=svg)](https://circleci.com/gh/zeromq/jeromq)

[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=zeromq_jeromq&metric=alert_status)](https://sonarcloud.io/dashboard?id=zeromq_jeromq)

[![Coverage Status](https://coveralls.io/repos/github/zeromq/jeromq/badge.svg?branch=master)](https://coveralls.io/github/zeromq/jeromq?branch=master)

[![Maven Central](https://img.shields.io/maven-central/v/org.zeromq/jeromq.svg)](https://maven-badges.herokuapp.com/maven-central/org.zeromq/jeromq)

[![Javadocs](http://www.javadoc.io/badge/org.zeromq/jeromq.svg)](http://www.javadoc.io/doc/org.zeromq/jeromq)

## Features

* Based on libzmq 4.1.7.

* ZMTP/3.0 (http://rfc.zeromq.org/spec:23).

* tcp:// protocol and inproc:// is compatible with zeromq.

* ipc:// protocol works only between jeromq (uses tcp://127.0.0.1:port internally).

* Securities

  * [PLAIN](http://rfc.zeromq.org/spec:24).

  * [CURVE](http://rfc.zeromq.org/spec:25).

* Performance that's not too bad, compared to native libzmq.

  * 4.5M messages (100B) per sec.

  * [Performance](https://github.com/zeromq/jeromq/wiki/Performance).

* Exactly same developer experience with zeromq and jzmq.

 

* TCP KeepAlive Count, Idle and Interval are known to only work with JVM 13 and later.

## Unsupported

* ipc:// protocol with zeromq. Java doesn't support UNIX domain socket.

* pgm:// protocol. Cannot find a pgm Java implementation.

* norm:// protocol. Cannot find a Java implementation.

* tipc:// protocol. Cannot find a Java implementation.

* GSSAPI mechanism is not yet implemented.

* Interrupting threads is still unsupported: library is NOT Thread.interrupt safe.

## Contributing

Contributions welcome! See [CONTRIBUTING.md](CONTRIBUTING.md) for details about the contribution process and useful development tasks.

## Usage

### Maven

Add it to your Maven project's `pom.xml`:

```xml

    

      org.zeromq

      jeromq

      0.6.0

    

    

    

      org.zeromq

      jeromq

      0.6.0

    

    

    

      

        sonatype-nexus-snapshots

        https://oss.sonatype.org/content/repositories/snapshots

        

          false

        

        

          true

        

       

    

```

### Ant

To generate an ant build file from `pom.xml`, issue the following command:

```bash

mvn ant:ant

```

## Getting started

### Simple example

Here is how you might implement a server that prints the messages it receives

and responds to them with "Hello, world!":

```java

import org.zeromq.SocketType;

import org.zeromq.ZMQ;

import org.zeromq.ZContext;

public class hwserver

{

    public static void main(String[] args) throws Exception

    {

        try (ZContext context = new ZContext()) {

            // Socket to talk to clients

            ZMQ.Socket socket = context.createSocket(SocketType.REP);

            socket.bind("tcp://*:5555");

            while (!Thread.currentThread().isInterrupted()) {

                // Block until a message is received

                byte[] reply = socket.recv(0);

                // Print the message

                System.out.println(

                    "Received: [" + new String(reply, ZMQ.CHARSET) + "]"

                );

                // Send a response

                String response = "Hello, world!";

                socket.send(response.getBytes(ZMQ.CHARSET), 0);

            }

        }

    }

}

```

### More examples

The JeroMQ [translations of the zguide examples](src/test/java/guide) are a good

reference for recommended usage.

### Documentation

For API-level documentation, see the

[Javadocs](http://www.javadoc.io/doc/org.zeromq/jeromq).

This repo also has a [doc](doc/) folder, which contains assorted "how to do X"

guides and other useful information about various topics related to using

JeroMQ.

## License

All source files are copyright © 2007-2024 contributors as noted in the AUTHORS file.

Free use of this software is granted under the terms of the Mozilla Public License 2.0. For details see the file `LICENSE` included with the JeroMQ distribution.