CODEWITHSUNDEEP
javaindexingfilesystems
André C. Andersen
André C. Andersen

Reputation: 9375

Using java to represent a file structure in memory?

I'm trying to index a file structure (not actual data) relative to a specific path on my local disk. Initially I load the file structure to memory then listen for real changes in the directory. If one occurs then I update the relevant indexed files in internal memory. Not unlike what dropbox seems to do?

Does there exist any java-library which can do this? I don't really want to implement this from scratch.

Upvotes: 0

Views: 435

Answers (2)

Grooveek
Grooveek

Reputation: 10094

To listen for changes on a file, you can have a look at apache commons io which has a FileAlterationMonitor.

Upvotes: 3

dogbane
dogbane

Reputation: 274612

Java 7, as part of NIO.2, has the WatchService API.

The WatchService API is designed for applications that need to be notified about file change events.

Upvotes: 2

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