dropwizard: @Context or @Session injection not working in ContainerRequestFilter

Most common mistake is using object instance instead of class.

Instead of registering a object instance like this

environment.jersey().register(new AuthDynamicFeature(new ExampleAuthFilter()));

use the class while registering the filter (so that @Context injection will work as expected),

environment.jersey().register(new AuthDynamicFeature(ExampleAuthFilter.class));

I use dropwizard:1.0.5 and what is actual solution to use:

@Context HttpServletRequest request;

I was trying but request is always null

@abhishek199-dhn here is not the best place to solve Jersey injection problems, so I would recommend to ask directly on jersey’s discussion groups.

That being said, I’m not sure how to fix your problem. One solution would be to register a class and put its dependencies in an hk2 AbstractBinder registered also into jersey… but it’s not very elegant, true.

I made a PR (#1715) to finally close this issue 😃

Actually @psamsotha, it seems that PolymorphicAuthDynamicFeature already works with classes (but not objects), so the needs for passing object may arises, but the probability seems low.

I would have like to make a PR for AuthDynamicFeature but I’m going to be unavailable for a month, and honestly, I decided to stop using the dropwizard-auth package (I preferred to integrate pac4j with dropwizard, if it is successful I will make a bundle of it I think), but if you want to wait that time, I will do it gladly 😃

Hi, I’m back on this:

After some reading (mainly of the documentation of Configurable.register(java.lang.Object component)), actually, there should be support for injection of the @Context annotated members of the ContainerRequestFilter (at least supported by default of course) if it was registered by AuthDynamicFeature as a class and not an instance.

So it would be interesting if AuthDynamicFeature would support passing a class instead of an instance in the constructor (maybe both exclusive cases should be available even).

I tested it and it does work.

What do you think?