apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/aop/NamespaceAcquireLockAspect.java/NamespaceAcquireLockAspect/requireLockAdvice
class NamespaceAcquireLockAspect:  @Before("@annotation(PreAcquireNamespaceLock) && args(appId, clusterName, namespaceName, item, ..)")
  public void requireLockAdvice(String appId, String clusterName, String namespaceName,
                                ItemDTO item) {
    acquireLock(appId, clusterName, namespaceName, item.getDataChangeLastModifiedBy());
  }