Vaadin Add-on example project

An empty project for creating a Vaadin add-on. You should start from this project if your add-on's components are based on the existing Vaadin classes or doesn't use 3rd party JavaScript modules.

Add-on architecture

Alternative add-on templates

If you wish to build and publish an add-on or extension in Vaadin Directory, Vaadin provides the following three template projects:

1. (this repo) vaadin/addon-template: Create a composite component. This Java-only template is the easiest when extending Vaadin Java components.
2. vaadin/client-server-addon-template: Build a standalone, client-server TypeScript-Java component. This template provides you with a Lit-based example to start with.
3. vaadin/npm-addon-template: Wrap a web component from npmjs.com as a Vaadin Java component.

Development instructions

Important Files

• TheAddon.java: this is the addon-on component class. You can add more classes if you wish, including other Components.
• TestView.java: A View class that let's you test the component you are building. This and other classes in the test folder will not be packaged during the build. You can add more test view classes in this package.
• assembly/: this folder includes configuration for packaging the project into a JAR so that it works well with other Vaadin projects and the Vaadin Directory. There is usually no need to modify these files, unless you need to add JAR manifest entries.

If you are using static resources such as images, JS (e.g. templates) and CSS files the correct location for them is under the /src/main/resources/META-INF/resources/frontend directory and is described here Resource Cheat Sheetin more details.

Deployment

Starting the test/demo server:

mvn jetty:run -Pdevelopment

This deploys demo at http://localhost:8080

Integration test

To run Integration Tests, execute mvn verify -Pit,production.

Tests run by default in headless mode, to avoid browser windows to be opened for every test. This behaviour is always disabled when running the tests in debug mode in the IDE or when running maven with the -Dmaven.failsafe.debug sytem property. On normal execution, headless mode can be deactivated using the -Dtest.headless=false system property.

Publishing to Vaadin Directory

You should change the organization.name property in pom.xml to your own name/organization.

    <organization>
        <name>###author###</name>
    </organization>

You can create the zip package needed for Vaadin Directory using

mvn versions:set -DnewVersion=1.0.0 # You cannot publish snapshot versions 
mvn clean package -Pdirectory

The package is created as target/{project-name}-1.0.0.zip

For more information or to upload the package, visit https://vaadin.com/directory/my-components?uploadNewComponent