Jody Garnett ha scritto: > Thanks for the background Andrea - I was able to sort things out. It > involved messing with uDig start up sequence a fair bit; you will find I > added a method to your factory in order to perform a quick check; and > based on the feedback manage to open a dialog letting the user know what > is going it. Your code review/feedback would of course be welcome.
The method you added is "isUnpacked", right? It seems to me it has a long window of time in which it won't work properly. The method just checks the directory has been created, which happens right before starting to create the database. So for all the time it takes to populate the db (15-30 seconds) that method will return an invalid response, the db is not really unpacked until everything is done. A better solution would be to add a marker file when the database has been fully created and turned read-only. Checking the existence of that file would be a better way to check if the database has been unpacked. That file could also be used as part of the solution that detects a database that has not been completely unpacked and is left on the disk incomplete, think for example a user killing the process while it's unpacking the database. However there is something I'm not sure how to handle: two processes trying to create the same database in parallel. I guess another file marking the start of the creation could be used as a lock file, along with this recipe: http://www.exampledepot.com/egs/java.nio/SetFileLock.html If we bundle that with the idea of using a pre-made database that has been stored as a resource we should get a epsg database that unpacks quick and safely. Cheers Andrea -- Andrea Aime OpenGeo - http://opengeo.org Expert service straight from the developers. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
