apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/controller/ReleaseController.java/ReleaseController/findActiveReleases
class ReleaseController:  @GetMapping("/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/releases/active")
  public List<ReleaseDTO> findActiveReleases(@PathVariable("appId") String appId,
                                             @PathVariable("clusterName") String clusterName,
                                             @PathVariable("namespaceName") String namespaceName,
                                             Pageable page) {
    List<Release> releases = releaseService.findActiveReleases(appId, clusterName, namespaceName, page);
    return BeanUtils.batchTransform(ReleaseDTO.class, releases);
  }