问题
I am using camel 2.10.7 with great success from servicemix to feed files from the local file system to my application.
The files shall remain on the file system, hence I use a configuration like this one.
from uri="file:../ange-data/vessels?noop=true&idempotentKey=${file:name}-${file:modified}"
This works great if I touch/update a file on the file system.
Only issue remains: how can I then in my Java code detect that a file has been removed from the file system by some other person or process?
Could not find any hint by studying the manual pages http://camel.apache.org/file-language.html or http://camel.apache.org/file2.html - but I believe it should be possible to get a message on file deletion?
回答1:
You would need to use Java 7 nio2 which has a file watcher api where you can get notifications when files are added/removed etc.
Search the web / SO for details on this api, for example
- http://docs.oracle.com/javase/tutorial/essential/io/notification.html
来源：https://stackoverflow.com/questions/25484212/apache-camel-2-10-7-monitor-deletion-of-files-from-file-system