[MYFACES-4225] [perf] Negative-Cache whether a file exists in ExternalContextResourceLoader

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.11
• Fix Version/s: 2.3-next-M5
• Assignee: Thomas Andraschko
• Reporter: Christian Beikov
• Created: 13/Apr/18 16:01
• Updated: 10/Feb/21 20:18
• Resolved: 06/Oct/20 14:25

Description

I'm seeing many sun.nio.fs.UnixException being thrown in the underlying code because ExternalContextResourceLoader.libraryExists calls ExternalContext.getResource which in the end checks if a file exists on the FS. I'd suggest when the project stage is PRODUCTION, this should be cached. Maybe this could be done by installing an ExternalContextWrapper that caches all resource lookups? I just see that parsing a XHTML causes many exceptions to be thrown internally which negatively affects performance.