红帽全球峰会104.8. 交换属性，仅限文件消费者
由于文件消费者实施 BatchConsumer，它支持对它轮询的文件进行批处理。通过批处理，我们意味着 Camel 会将以下额外属性添加到交换中，因此您知道轮询的文件数量、当前索引以及批处理是否已完成。
| 属性 | 描述 |
|---|---|
|
| 此批处理中轮询的文件总数。 |
|
| 批处理的当前索引。从 0 开始。 |
|
|
指示批处理中最后一个交换的 |
这样，您可以让实例知道此批处理中存在多少个文件，而实例则让 Aggregator2 聚合了这个文件数。
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