[jboss-dev-forums] [JBoss Microcontainer Development POJO Server] - Re: VFSClassLoaderPolicy backed jboss-cl performance issue

[mstruk]

"jaikiran" wrote : A bit more on a higher level - Assuming we have a ZipEntryContext/Handler, does it know of the entries within that zip? I see a ZipEntryContext.entries Map in the code, but haven't yet figured out whether looking directly into this would indicate the presence/absence of a resource within the zip.
  | 
  | So if a getChild(String path) is invoked, maybe looking into this "entries" would tell us whether it's present or not?
  | 

Yes, ZipEntryContext.entries contains relative path of the entry within a zip as the key and EntryInfo representing the entry as the value.
It reflects the state of a zip archive in a specific point in time.

Since entries is initialized in a lazy manner you need to make sure it was initialized first - before relying on direct entries.get(path). 

ensureEntries() is the method that does that and it is called from checkIfModified(). 

But you can call ensureEntries() directly of course - without going through checkIfModified().

There is initStatus field you can use to check that entries have been initialized:


  | if (initStatus == InitializationStatus.INITIALIZED) {
  |    EntryInfo entry = entries.get(path);
  | }
  | 

But again, if you want to detect changes in the underlying zip file, you have to call checkIfModified which does the reinit of entries for you if it detects a change.

- marko

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