apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/aop/NamespaceAcquireLockAspect.java/NamespaceAcquireLockAspect/tryLock
class NamespaceAcquireLockAspect:  private void tryLock(long namespaceId, String user) {
    NamespaceLock lock = new NamespaceLock();
    lock.setNamespaceId(namespaceId);
    lock.setDataChangeCreatedBy(user);
    lock.setDataChangeLastModifiedBy(user);
    namespaceLockService.tryLock(lock);
  }