java - Apache :Camel Request body gets lost after using log component

Question

每当我使用.log()时在我的 route ，下一条路线收到一个空的主体。添加 .streamCaching()一开始这个问题已经解决了，但这就是我永远必须使用的方式。也会streamCaching对其他组件还有其他影响吗？调用我正在使用的路线 ProducerTemplates.asyncSendBody()

Answer 1

来自Camel's official documentation :

While stream types (like StreamSource, InputStream and Reader) are commonly used in messaging for performance reasons, they also have an important drawback: they can only be read once. In order to be able to work with message content multiple times, the stream needs to be cached.

因此，您的问题在于对 .log() 的调用实际上会读取流，如果未缓存该流，则后续读取将导致不返回任何数据。