Vaadin7 : Load a file one time for all users

Vaadin 6 / 7 / 8
1

Dear Vaadin community,

I am building a
Vaadin7
 application which, among other things, loads a XML file which is the same for all the users.
If i load this file from the init() method, then if 1000 users open a session, the file will be loaded 1000 times, isn’t it ?
How to load the file one time rather than 1000 times ???

Eric

2

Why don’t you use a static method that does this. Also, you may require a static variable to keep the status so that it will be done only once.

3

For web app initialization, you should consider the web standard method for initializing it via a ServletContextListener as it’s invoked once when your webapp is started via public void contextInitialized(ServletContextEvent sce), and once on shutdown via public void contextDestroyed(ServletContextEvent sce).

4

Thank you Syam and David

ServletContextListener doesn’t work for me because of an issue described here :
https://vaadin.com/forum#!/thread/3855161

So i use the “static” keyword, it works fine.

Eric