This repository contains a range of examples so you can get up and running easily with Vert.x.
Maven users
Start with the simplest Maven example to show you how to setup a simple Vert.x project that uses
Maven. You need to have Java 8 installed and set the JAVA_HOME environment variable to point to your Java 8
installation.
Use that as a template for setting up a Maven project with Vert.x.
Progress to the simple Maven verticle example to show you how to deploy your code as verticles in a Maven project. Also check Maven verticles examples to show how you can use Maven with Groovy, Ruby, and JavaScript verticles.
Want to start right away, open the first example in Eclipse Che:
Gradle users
Start with the simplest Gradle example to show you how to setup a simple Vert.x project that uses Gradle.
Use that as a template for setting up a Gradle project with Vert.x.
Neither Maven nor Gradle users
That’s fine too :)
You can run most of the examples at the command line using vertx run if you have Vert.x installed (see below).
Some examples need examples-utils
You may find examples that need examples-utils. You need to build it from link:examples-utils:
git clone https://github.com/vert-x3/vertx-examples.git
cd vertx-examples
cd examples-utils
mvn clean installThe examples
The examples demonstrate how to use all different bits of Vert.x including Vert.x core, Vert.x-Web and various other services and features.
Most of the examples have been written as verticles. For more information on verticles please consult the Vert.x core manual.
Using verticles allows you to scale and run your code from the command line more easily, but if you prefer the same code in the verticles can also be run embedded. It’s really up to you. Verticles are entirely optional in Vert.x.
Different languages
Most of the examples are available in all the languages that Vert.x supports.
You’ll find the examples for the relevant language in a directory src/main/${lang} where lang is an identifier for the
language, e.g. java, js, ruby etc.
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Note |
All the non-Java examples are automatically generated from the Java examples using our magic code translator. |
Running the examples
Running in your IDE
Most of the Java examples can be run directly in your IDE (if you have one!).
We provide a main() method in most of the example classes which allows you to conveniently run them directly in your IDE.
Just right click the main method or class in your IDE and run as… application (supported by all major IDEs).
Running at the command line
If vertx is installed you can also run any verticle directly on the command line. This way of working may be of interest
to you, if you don’t want to use Maven or Gradle or perhaps you don’t use an IDE.
Or perhaps you’re just a command line kind of person.
If you’re coming from using other platforms such as Node.js you might want to work this way. You can think of the
vertx command as a bit like the node command in Node.js.
Instructions for installing Vert.x are in the next section.
Once Vert.x is installed, to run an example, just cd to the example directory and type vertx run followed by the filename
of the verticle. For example
cd core-examples/src/main/java/io/vertx/example/core vertx run EchoServer.java cd core-examples/src/main/js/echo vertx run echo_server.js
Yes! You can run Java source files directly using Vert.x (no compilation required).
Installing Vert.x
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Note |
This is only necessary if you want to run Vert.x at the command line. If you’d prefer to work with Maven or Gradle projects then you don’t need to pre-install Vert.x - you just let Maven/Gradle pull in the Vert.x dependencies into your project as you would with any dependency. |
Pre-requisites: You will need to have Java 8 JDK installed.
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Download a Vert.x 3 distribution
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Unzip it somewhere on your disk (e.g. in your home directory)
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Set your
PATHenvironment variable to include the installation directory -
Test the install by typing
vertx -version.
On the download page, you will find several distributions. Each distribution has a different set of components:
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Min: The min distribution contains only Vert.x Core, the support of the different languages, and the Hazelcast clustering.
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Full: The full distribution contains all the components of the Vert.x stack. It includes Vert.x web and the different data access technologies.
Vert.x core examples
The Vert.x core examples contains a wide range of examples using just Vert.x Core.
Vertx Unit examples
Vertx-Unit is a library for writing asynchronous tests. We include some examples of how to use this tool to test your Vert.x (or other asynchronous) applications.
Vert.x JUnit 5 examples
The vertx-junit5 modules allow testing Vert.x asynchronous operations with JUnit 5.
RxJava examples
Vert.x for RxJava provides most of its APIs as RxJava so you can use those if you prefer.
RxJava is a great choice when you want to perform complex operations on multiple asynchronous streams of data.
gRPC examples
The Vert.x gRPC Examples show how you can implement a gRPC service and invoke a gRPC service with Vert.x.
Mail examples
The mail examples show different ways to create the mail message and send it via
tls, ssl etc. The examples either use localhost:25 to send a mail or use host
mail.example.com. To actually run the examples you will have to change the
mail server and the user credentials in the MailLogin example.
Maven Service Factory examples
The Vert.x Maven service factory examples shows how to package a verticle that can be deployed using the Maven Service Factory. Such a deployment is also demonstrated using either the command line or the api.
Service Proxy Examples
The Vert.x Service Proxy examples contains an example of service proxy usage. It depicts how a service provider can be implemented and how the published service can be consumed.
Cloud Foundry examples
The Vert.x Cloud Foundry example shows how to deploy Vert.x application to a Cloud Foundry service or platform of your choice.
Docker examples
The Vert.x Docker examples shows how to deploy Vert.x application in Docker containers. It also contains an example of the application that can be deployed on Fabric8.
Openshift & Kubernetes examples
The Vert.x OpenShift 3 examples shows how to deploy Vert.x applications on Openshift 3 and Kubernetes. It also demonstrates clustering and service discovery.
Spring Examples
The Vert.x Spring Examples shows how vert.x application can be integrated inside a Spring ecosystem.
Redis example
The Vert.x Redis Example shows how you can interact with Redis using the vert.x Redis client.
Mongo example
The Vert.x Mongo Example shows how you can interact with MongoDB using the vert.x Mongo client.
JDBC example
The Vert.x JDBC Examples shows how you can interact JDBC Databases using the vert.x JDBC client.
MQTT example
The Vert.x MQTT Examples shows how you can write MQTT servers and clients using Vert.x MQTT.
Service Proxy Examples
The Vert.x Service Proxy examples contains an example of service proxy usage. It depicts how a service provider can be implemented and how the published service can be consumed.
Java 9 examples
This Java 9 examples shows how a simple Java 9 modular application using Vert.x as anonymous modules.
HTTP/2 Showcase
This HTTP/2 Showcase application highlights the benefits of HTTP/2 when dealing with latency on the web.
JCA example
The Vert.x JCA Examples provide a JEE compliant application that enables to you deploy the application into a Wildfly application server. While simple in implementation, the JCA examples provides a good point of departure for your own development.