So the feature request sounded "reasonable". From my web based Java module, which is primarily a tag library that reads in and is wholly dependent upon xml files from the local file system (through URLClassLoader), devise a fallback strategy if for some some reason the source xml files should become unavailable or corrupted. My application checks for updates to these files on a configurable interval. If an update is indicated, the file is reread and the cache refreshed.
Hey, I've done this in desktop applications... read in a file... it's good, copy the contents to a "known good" location on the file system. Perform this operation on each subsequent positive read. If for some reason a read goes awry, load in the prior good version, issue a error to the log and continue. Problem is, this isn't as straight forward in a web application environment. By design there is little if any direct file system access from a web module. And for what there is (from what I've been able to determine) there's no guarantee that one approach is portable from one web server to the next. That said, I'm asking the group if there is a "simple" solution to this. While I could go through the overhead of configuring a database in the backend for storing the deltas it seems a bit of an overkill for the task. I want to avoid over-engineering the solution (after all, if the source xml files are broken, this is a serious matter... it really should fail severely so it gets attention). While writing this (sorry for the long winded post) I have come up with a simple solution... if the subsequent read of the source fails issue the error and simply don't refresh the cache... but my question is now more out of curiosity and academic. What reasonably simple approach(es) can be utilized to handle this requirement (again, outside of harnessing a datasource)? thanks, K2 -- You received this message because you are subscribed to the Google Groups "Java EE (J2EE) Programming with Passion!" group. To post to this group, send email to java-ee-j2ee-programming-with-passion@googlegroups.com To unsubscribe from this group, send email to java-ee-j2ee-programming-with-passion+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/java-ee-j2ee-programming-with-passion?hl=en?hl=en
