Vaadin Charts: License Check

Flow
1

Hi,

The license check for Vaadin Charts currently checks for
a) A file in the user.home directory
b) A system property

Would it be possible to change it additionally check in either web.xml (context-param) or for a license file in the web-apps classloader?

We need to be able to make it trivial to deploy a war on a client site, as this is often done by third parties (read IT Departments); setting system properties or creating files in the home directory of the user running the application server are steps that are bound to confuse the poor chaps.

Cheers,

Charles.

2

Hi,

If your server don’t have security manager constraints you could use System.setProperty(String,String) in your apps init.

Adding an additional licence file check from classloader sounds a good idea to me. Would you file an enhancement ticket for it?

cheers,
matti

3

Yes - but security manager constraints will be environmentally controlled (i.e. I won’t be in control of whether I do or don’t have a security manager)… it’ll do as an interim measure though.

Done :
#11884

Cheers,
Charles.

4

Hi, it looks like I might have to do this (doing the license check from classloader) since, after I set the property in my app’s init() method I still see the license warning in our production Tomcat server’s log file. This may be a stupid question (I’m not well-versed in J2EE programming): could you provide an example of how I would modify my app to “do the license check from the class loader”? Thanks a bunch.

5

Adding a file /.vaadin.charts.developer.license in your classpath should do the trick… ( With the content of your license key )

From the ticket they added the followin:


 	46	                URL resource = LicenseChecker.class.getResource("/vaadin.charts.developer.license"); 
 	47	                if(resource == null) { 
 	48	                    resource = LicenseChecker.class.getResource("/.vaadin.charts.developer.license"); 
 	49	                }