This case involves using the Loader package ETL programs as the previous use case.

这个案例包含了Loader包里的ETL程序，这在上一个使用案例中也被使用了。

youdao

This serialization is commonly the case when custom payload types are packaged in the portlet WAR file because each Web module is deployed in its own class loader.

当在Portlet WAR文件中对自定义有效负载类型打包时，通常就会出现这种序列化情况，因为每个Web模块是在各自的类加载器中进行部署的。

youdao

In the case where this does not exist, then the result might be a loader being invoked, which will load the value from a back-end datastore (4).

如果它不存在，那么结果可能会是一个正被调用的加载程序，它会从一个后端数据存储(4)加载值。

youdao