WebSockets are useful for having a very dynamic application, where data is shared in near real-time between the server and its clients.
JHipster currently uses Spring WebSockets as its implementation, so you will find a lot more information on this feature on the Spring WebSockets website.
This option has a few limitations:
- By default, we use the dispatcher provided by Spring Websockets, which is an in-memory implementation. Obviously, it will not scale if you want to use several servers. If you want to do so, have a look at the Spring WebSockets documentation which explains how to configure an external broker.
The “Tracker” example
JHipster provides a simple “tracker” example out-of-the-box. Located in the
admin menu, it will track the other users’ behavior: you will see their login and IP, and which page they are currently viewing.
- This is provided as an example so you can easily get started using WebSockets, not as a “production-ready” user tracker, but it works quite well.
- It will show you how to integrate WebSockets with Spring Security, which is quite a complex topic
- This works because JHipster is a Single-Page Web Application, so the WebSockets connections are not reinitialized between each page: this is where you get one of the big benefits of JHipster’s architecture