Spring Boot: user notifications with web socket

This example will shows how to send notifications, via web socket, to specific logged-in users.

Could be useful, for example, if you are trying to implement a real-time user notification system.

Build and run

Configurations

Open the application.properties file and set your own configurations.

Prerequisites

• Java 8
• Maven > 3.0

From terminal

Go on the project's root folder, then type:

$ mvn spring-boot:run

From Eclipse (Spring Tool Suite)

Import as Existing Maven Project and run it as Spring Boot App.

Usage

• Launch the application and login into it with one of the following credentials (Username / Password):

  • UserA / UserA
  • UserB / UserB
  • UserC / UserC

• Keep a window open on the index url "/" and open another window on the url "/notifications" and "/feedback" to launch the web socket connection and receive messages.

• Click the button to send a fake action: only current logged in user will be notified of the action on the web socket channel. Other user do not receive the notification.

• Open a new private/incognito windows of your web browser and login with a same user. => Click action => both user in normal windows and private windows are received notification.