Tim, Thank you so much for your reply. There are two requirements for this cache: first, the files shall be cached to the disk; second Also, that a whole file content shall be cached instead of just a filename. I am not using java much, and have not been using that for a long time. Can you point me to what object I should rebuild the input stream, which I think can be serialized for use in JCS?
do appreciate any input on this. fox1964 Tim Cronin-2 wrote: > > If you're only using the memory cache you should be able to cache those > input streams, but you can't serialize them to disk as they have native > file handles tied to them. > > You would need to wrap them and basically rebuild the input stream > completely. > > It might just be simpler to cache the file name and build the input > stream. > > If you're concerned about performance I think the reading will be the > biggest issue and not the creation of the input stream itself. > > > -----Original Message----- > From: fox1964 [mailto:hucho...@yahoo.com] > Sent: Tuesday, October 06, 2009 10:17 PM > To: jcs-users@jakarta.apache.org > Subject: How to Cache A Physical File > > > I have a large physical file downloaded to my server. I'd like to > cache the > file so that my program can read faster. I've configured JCS properly. > I > can see the "mycache.key" and "mycache.data" files are updated every > time I > use a string for both a key/value pair. But how can I put a physical > file > into cache? Right now, I use an "FileInputStream" object to read the > file, > and put into the cache. > > FileInputStream input = new FileInputStream(file); > cache.put(input); > > This seems to go thru without prompting any error message. But when I > tried to retrieve it, I got a message "java.lang.NullPointerException" > when > cache.get(key); > > I can see the mycache.key file updated, but can NOT see any updates in > mycache.data file by looking at the timestamp. > > Any guru can show me what I may do wrong? Or do you have any sample > code > to do this? Thanks a lot in advance. > > > -- > View this message in context: > http://www.nabble.com/How-to-Cache-A-Physical-File-tp25779933p25779933.h > tml > Sent from the JCS - Users mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org > For additional commands, e-mail: jcs-users-h...@jakarta.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org > For additional commands, e-mail: jcs-users-h...@jakarta.apache.org > > > -- View this message in context: http://www.nabble.com/How-to-Cache-A-Physical-File-tp25779933p25796503.html Sent from the JCS - Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org For additional commands, e-mail: jcs-users-h...@jakarta.apache.org
