Hi Jo,

What you want sounds simple enough to do by hand and basic file-io.
Maybe just a single file with three values per line?
Just some CSV-like structure will do.
ID,PATH,BINARYDUMP<newline>

If you make sure your binarydump is encoded some safe way (in this case: no
raw comma's and no newlines) you are ready to go.

Just make a few routines for lookup for ID (SELECT-functionality) and
Insertion of a new record (INSERT-functionality) and DELETE.
The only thing you need is basic file-io to delete a line, or lookup a line.

It will not have great performance, but you have just one simple file.

I guess in most situations I would just prefer a normal database though, but
I don't know your requirements.

Hope this helps,
Regards,
Erwin

Hello,

Have you looked at Servertec Persistent Object Store, www.servertec.com

Manny

"J. Passing" <johannes.passing@gmx.net> wrote in news:bv80cl$r4t$1
@zeppelin.rz.uni-potsdam.de:

You want a cache, a hashmap that swaps to disk or a standard jcache
implementation?

Anyway, you should probably do this:

-write a serializable record class
-write a diskelement class that hold the "long" diskpointer.
-write a diskstore that appends/deletes/manages diskblocks in a file.

All that in a week max.

Or just search for "EHCache".