I'm reading 
https://jersey.github.io/documentation/latest/filters-and-interceptors.html
 and http://www.dropwizard.io/1.1.4/docs/manual/core.html#jersey-filters to 
try and make this:

@CookieParam("User-Data") userData: String,@HeaderParam("User-Agent") 
userAgent: String,

Not needed in each and every resource GET method of my web app. userData is 
json data from a cookie with fields like "name" and "id" and userAgent is 
the full User-Agent string from the header. For each view I pass in:

AppUser.getName(userData), AppUser.isMobile(userAgent)

The getName function parses the json and returns just the name field and 
the isMobile function returns a true boolean if the string "mobile" is 
found.

I use this in each view of the app in FreeMarker to display the user's name 
and to change some layout stuff if mobile is true.

Is there a way to make this less repetitive? I'd rather use a BeforeFilter 
to just set this automatically each time.

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