event.setTrace(trace);
        event.setArtifact(artifact);
        event.setException(exception);

        repositoryEventDispatcher.dispatch(event.build());
    }

    private int getPolicy(RepositorySystemSession session, Artifact a, ArtifactDescriptorRequest request) {
        ArtifactDescriptorPolicy policy = session.getArtifactDescriptorPolicy();
        if (policy == null) {