apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/controller/ReleaseController.java/ReleaseController/findActiveReleases
class ReleaseController:  @GetMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/releases/active")
  public List<ReleaseDTO> findActiveReleases(@PathVariable String appId,
                                             @PathVariable String env,
                                             @PathVariable String clusterName,
                                             @PathVariable String namespaceName,
                                             @Valid @PositiveOrZero(message = "page should be positive or 0") @RequestParam(defaultValue = "0") int page,
                                             @Valid @Positive(message = "size should be positive number") @RequestParam(defaultValue = "5") int size) {

    if (permissionValidator.shouldHideConfigToCurrentUser(appId, env, namespaceName)) {
      return Collections.emptyList();
    }

    return releaseService.findActiveReleases(appId, Env.valueOf(env), clusterName, namespaceName, page, size);
  }