Hi,
I wanted to mention that we are using YajCache
(http://yajcache.sourceforge.net/) within a map viewer that was just
released on Friday at this location:
http://www.arcwebservices.com/v2006/labs/mvj_lab.do . It's currently
in a beta state, so to get access to it, we ask interested people to
sign-up (you get 90 days free) purely to find out if anyone is
interested. :-)
What we were looking for was a light-weight client-side cache component
that retains data retrieved from HTTP servers on local disk - basically
to be used by a Java Web Start application or applet. Initially, we
were very surprised nothing seemed available for this (possibly small)
application space. Even Java seems to no longer support client-side
caching within browser-based applets. So, we were very happy to stumble
across yajcache - it made sense in terms of sufficient basic cache
features, as well as JAR size - yajcache weighs in at about 70Kb
normally, but can be compressed to 20 Kb using pack200.
Some things that would be really useful to see would be
(1) support for a least-recently-used strategy,
(2) synchronization across multiple processes within the same machine, and
(3) a "cache cleaner" that removes "old" data from disk.
We wrote our own implementation of a cache cleaner, but no guarantees it
works well without a solution for (2). I dunno, maybe we could be smart
and use sockets or something like that. Anyway, for now, we're pretty
happy with what is available.
Feel free to give me feedback on the map viewer as a whole. Thanks,
-- Russell
Software developer, ESRI,
http://www.arcwebservices.com/v2006/
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