postHandle怎样实现

场景：实现了一个hivewriter插件，想要统计下同步到hive的数据量，通过实现JobContainer的postHandle方法怎样实现？现在是同步完数据之后在JobContainer中做的，感觉不太好，因为只是hivewriter有这个需求，所以想要在插件里面做,要怎么配置？

The issue names JobContainer.postHandle and a hivewriter plugin, but no file or test. Start by locating those entry points and tracing when postHandle runs relative to synchronization; then inspect how plugin configuration is passed. Done means a documented, plugin-local way to count rows synced to Hive without changing JobContainer.

Written by the indexing model from the issue text.