void FileCollectorImpl::TickProc() {

  file_node_map_t::iterator it_map, end;
  for (it_map = m_mapFileNode.begin(), end = m_mapFileNode.end(); it_map != end; ++it_map) {

    FileNode* pFileNode = it_map->second;
    if (NULL == pFileNode) { continue; }

    pFileNode->TickProc();
  }
}