Question

Is it possible to configure Apache Camel File component to use Java 7 WatchService rather than scan input directory periodically?

If no, is it possible to achieve the same goal (i.e. avoid file system scans when nothing changed) with Camel “easily”?

Answer 1

Updated to remove wrong info

You can write such a component, maybe by extending the File component.

Or even simpler, build something very simple with the ´WatchService´ that fires of a trigger message to the File component when there is a file to pick up. Then you just have to worry about the file logic, which works rather well with Camel.

Something like:

from("mywatchcomponent:/var/files/")
 .to("direct:pickUp")

from("direct:pickUp")
 .pollEnrich("file:/var/files/")
 .bean(whatever)..