--- Chuck Esterbrook <[EMAIL PROTECTED]> wrote: > I added your paper to: > http://webware.sourceforge.net/Papers/
> > > > http://www.opensky.ca/~jdhildeb/webware/ > > In Jason's paper and elsewhere in the MiddleKit docs there is some advice on avoiding concurrency issues: ''' Concurrency Issues . . . If it is likely that two users will attempt to manipulate the same object, you may want to implement a locking mechanism to prevent problems from occurring. ''' During some stress testing a few days ago I found that if two servlets are updating or inserting different records at the same time using a single store, then a store.saveChanges() from either of the servlets writes all updated records in the store to the database. So for any updates, it is best to either use unique stores or put locks around the update operations. Not doing so may result in bad things happening, the most noticeable in my tests was an abend in ObjectStore.py when an assert caught a positive serial number in an object which was about to be added to the database. Roger __________________________________________________ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/ ------------------------------------------------------- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power & Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en _______________________________________________ Webware-discuss mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/webware-discuss
