How do I access the Throwable in a Quarkus ContainerResponseContext?

[rsshah]

I have a service using Quarkus 2.16.4.Final and resteasy-reactive. Inside of a ContainerResponseFilter, I want to access the Exception that was thrown by my service code. In Jersey 1.x, there used to be a ContainerResponse.getMappedThrowable() which provided this.

From digging in the ContainerResponseContextImpl, the ResteasyReactiveRequestContext does have what I need in its throwable field, accessible from getThrowable(). However, the ContainerResponseContextImpl doesn't expose the ResteasyReactiveRequestContext, so I don't know how to get a reference to the throwable. It's not in the JAXRS API, I'm not sure where that method was moved from 1.x to 2.x.

Is there another way to do this, or is this a feature request?

Sample filter method, for illustration purposes:

    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) {
        MyData data = (MyData) requestContext.getProperty(PROPERTY_KEY);
        ContainerResponseContextImpl impl = (ContainerResponseContextImpl) responseContext;
        if (isFailureException(...)) { // How to get the exception? In Jersey 1.x this was accessed by ContainerResponse.getMappedThrowable().
            data.onFailed();
        }
    }

For now, I'm using reflection to poke into the ContainerResponseContextImpl.context.throwable, but surely there must be a better way 😅