code: @Scheduled(initialDelayString = PROP_SCHEDULER_DELAY_PLACEHOLDER, fixedDelayString = PROP_SCHEDULER_DELAY_PLACEHOLDER)
      public void runningRolloutScheduler() {
          LOGGER.debug("rollout schedule checker has been triggered.");
  
          // run this code in system code privileged to have the necessary
          // permission to query and create entities.
          systemSecurityContext.runAsSystem(() -> {
              // workaround eclipselink that is currently not possible to
              // execute a query without multitenancy if MultiTenant
              // annotation is used.
              // https://bugs.eclipse.org/bugs/show_bug.cgi?id=355458. So
              // iterate through all tenants and execute the rollout check for
              // each tenant seperately.
  
              systemManagement.forEachTenant(tenant -> rolloutManagement.handleRollouts());
  
              return null;
          });
      }
docs: Scheduler method called by the spring-async mechanism. Retrieves all
  tenants from the {@link SystemManagement#findTenants()} and runs for each
  tenant the {@link RolloutManagement#handleRollouts()} in the
  {@link SystemSecurityContext}.