/ServerPush

Flow project demonstrating a simple use of Server Push

Primary LanguageJavaScript

Server Push Example App

This project updates the server time in the browser once per second as a simple implementation of Server Push. Server Push is a technology where the server actively sends new data to the browser, typically to be shown in the UI. The Application class contains most of the code you will need to understand the example.

Running the application

The project is a standard Maven project. To run it from the command line, type mvnw (Windows), or ./mvnw (Mac & Linux), then open http://localhost:8080 in your browser.

You can also import the project to your IDE of choice as you would with any Maven project. Read more on how to import Vaadin projects to different IDEs (Eclipse, IntelliJ IDEA, NetBeans, and VS Code).

Deploying to Production

To create a production build, call mvnw clean package -Pproduction (Windows), or ./mvnw clean package -Pproduction (Mac & Linux). This will build a JAR file with all the dependencies and front-end resources, ready to be deployed. The file can be found in the target folder after the build completes.

Once the JAR file is built, you can run it using java -jar target/my-app-1.0-SNAPSHOT.jar

Project structure

  • MainLayout.java in src/main/java contains the navigation setup (i.e., the side/top bar and the main menu). This setup uses App Layout.
  • views package in src/main/java contains the server-side Java views of your application.
  • views folder in frontend/ contains the client-side JavaScript views of your application.
  • themes folder in frontend/ contains the custom CSS styles.

Useful links