Using custom annotations to generate biolerplate code

Folks, I am about to write a ton of J2EE/JAX-RS code where practically all public methods will do the following:

• Look for the presence of a security token in the request header.
• Call a utility to make sure the token is valid.
• If not valid, return an error response (or inject a null token)
• If valid, do some stuff, which might involve introspecting the token
• In most cases, return an updated token in response headers.

I'd love to be able to use annotations to abstract out this piece. I am imagining something like the following on the met开发者_如何转开发hod:

@RequireToken( returnRenewed=true )
@POST
@Path( "/some/path" )
public Result myMethod( ... )
{
    @InjectedToken
    final Token securityToken;
    ...
}

Any pointers on how to proceed?

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Have you considered using spring security for those actions? You might implement your own authentication filters.

If not spring security, maybe AOP and "before" or "around advice"s ?