it sounds like a stupid question and maybe I'm just blocked by whatever ... Using the new NIO2 of Java I can perfectly track the occurrance of new files, I can parse them and send the content so somewhere. But I have no glue how I can easily track the update and read the new stuff only ....
As always: any hint appreciated
You track the update by watching the parent directory for ENTRY_MODIFY.
Now for the bad news: Nothing in the Java in API tells you what is new. To learn about the new stuff you can use several methods e.g.
a) keep a copy of interesting files and send the diff
b) use a wrapping filesystem that hooks into writing and sends from there
