To support the pull mechanism, a business component must implement the Sensor interface.
要支持pull机制，一个业务组件必须实现Sensor接口。
As you can see in Listing 18, the document library returns only its size through the Sensor interface implementation.
正如您在清单18中所看到的，文档库通过Sensor接口实现返回的只是它的大小。
As you can see in Listing 18, the document library returns only its size through the Sensor interface implementation.
正如您在清单18中所看到的，文档库通过Sensor接口实现返回的只是它的大小。
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