code: private void updateSecurityReadyState() {
          if (!activated) {
              return;
          }
  
          String unavailableServices = getUnavailableServices();
          if (unavailableServices == null) {
              Tr.info(tc, "SECURITY_SERVICE_READY");
              securityReady = true;
  
              Dictionary<String, Object> props = new Hashtable<String, Object>();
              props.put("service.vendor", "IBM");
              reg = cc.getBundleContext().registerService(SecurityReadyService.class, this, props);
          } else {
              if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                  Tr.event(tc, "The following required security services are not available: " + unavailableServices);
              }
              securityReady = false;
              if (reg != null) {
                  reg.unregister();
                  reg = null;
              }
          }
      }
docs: Security is ready when all of these required services have been registered.