code: @GET
    @Path("/db/{authorizerName}/roles")
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    @ResourceFilters(BasicSecurityResourceFilter.class)
    public Response getAllRoles(
        @Context HttpServletRequest req,
        @PathParam("authorizerName") final String authorizerName
    )
    {
      return resourceHandler.getAllRoles(authorizerName);
    }
docs: @param req HTTP request
  
  @return List of all roles