Hi,
We have a dropwizard 1.1 service which authenticates inbound requests using
dropwizard-auth and I'm hoping to get access to that Principal in classes
which aren't resources. The tl;dr for why, is we have our own internal
authentication mechanism which retrieves a token from an http header and
needs to pass a variant of that header back out on any outbound requests it
makes to other services. Unfortunately I basically have no idea how the
jersey injection works... At all.
What I'm *hoping* to be able to do is register a ClientRequestFilter which
will thread the Principal from the inbound HttpServletRequest through to
the outbound jersey client request. Something like:
```
public class AuthenticationContextInjectionFilter implements
ClientRequestFilter {
public static final String OUTBOUND_HEADER_NAME = "Some-Thing";
@Inject // Or is it @Context?
private Provider<MyPrincipalClass> principal; // Have also tried
Provider<Principal>
@Override
public void filter(ClientRequestContext requestContext) throws
IOException {
final MyPrincipalClass principalVal = this.principal.get();
requestContext.getHeaders().add(OUTBOUND_HEADER_NAME,
principalVal.getHeader());
}
}
// and in my Application
environment.jersey().register(AuthenticationContextInjectionFilter.class);
```
However, it's basically always null so however jersey's injection works is
clearly not the way I think it works.
Is it possible to achieve what I'm trying to do here? I can probably biff
the value into a ThreadLocal to work around this, but that feels a little
like i'm surrendering. Is there some introductory documentation I could
read on this stuff?
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