code: public static RequestContext get() {
          if (CURRENT_CONTEXT.get() == null) {
              synchronized (RequestContext.class) {
                  if (CURRENT_CONTEXT.get() == null) {
                      createContext();
                  }
              }
          }
  
          // ensure that RequestContextV1 is also initialized for this request
          RequestContextV1.get();
  
          return CURRENT_CONTEXT.get();
      }
docs: createContext called for every request in the filter