Review request: 8011380: FX dependency on PlatformLogger broken

[Peter Levart]

Hi Mandy, Laurent,

What do you think of this variation (changed just PlatformLogger, other 
files exactly equal to your webrev):

http://dl.dropbox.com/u/101777488/jdk8-tl/PlatformLogger/webrev.enumapi.02/index.html

Moved the nearest >= intValue search to 
PlatformLogger.Level.valueOf(int) since it is used also by deprecated 
API. With this change the same logic is used for mapping from 
j.u.l.Level to PlatformLogger.Level in all cases.

I wonder if PlatformLogger.Level.intValue() should be exposed as public 
API. Currently it is used by the test (which is not in the same 
package). But this could be circumvented with reflection. I only see the 
use of it if we also make the PlatformLogger.Level.valueOf(int) public 
with anticipation of enabling PlatformLogger to use custom 
PlatformLogger.Level(s) like j.u.logging. This extension could be 
performed compatibly by transforming Level enum into a plain class like 
j.u.l.Level. But until then, I don't see the use of Level.intValue() as 
a public API. What do you think?

Regards, Peter

On 04/04/2013 06:52 AM, Mandy Chung wrote:
> Peter, Laurent,
>
> History and details are described below.
>
> Webrev at:
> http://cr.openjdk.java.net/~mchung/jdk8/webrevs/8011380/webrev.00/
>
> I add back the getLevel(int), setLevel(int) and isLoggable(int) 
> methods but marked deprecated and also revert the static final 
> variables to resolve the regression. They can be removed when JavaFX 
> transitions to use the Level enums (I'll file one issue for FX to use 
> PlatformLogger.Level and one for core-libs to remove the deprecated 
> methods).  The performance overhead is likely small since it's direct 
> mapping from int to the Level enum that was used in one of your 
> previous performance measurement.
>
> Laurent - you have a patch to add isLoggable calls in the awt/swing 
> code. Can you check if there is any noticeable performance difference?
>
> I also take the opportunity to reconsider what 
> JavaLoggerProxy.getLevel() should return when it's a custom Level. Use 
> of logging is expected not to cause any fatal error to the running 
> application.  The previous patch throwing IAE needs to be fixed.  I 
> propose to return the first Level.intValue() >= the custom level value 
> since the level value is used to evaluate if it's loggable.
>
> History and details:
> JavaFX 8 has converted to use sun.util.logging.PlatformLogger 
> (https://javafx-jira.kenai.com/browse/RT-24458). I was involved in the 
> early discussion but wasn't aware of the decision made. Thanks to Alan 
> for catching this regression out before it's integrated to jdk8.  
> jfxrt.jar is cobundled with jdk8 during the installer build step.  My 
> build doesn't build installer and thus we didn't see this regression.
>
> I ran jdeps on jdk8/lib/ext/jfxrt.jar (windows-i586) that shows 112 
> references to PlatformLogger and on jdk7/lib/jfxrt.jar that shows no 
> reference to sun.util.logging.
>
> I have a method finder tool (planning to include it in jdk8) to search 
> for use of PlatformLogger.getLevel and it did find 2 references from 
> jdk8/lib/ext/jfxrt.jar.
>
> JavaFX 8 is going to upgrade to use JDK 8 for JavaFX build 
> (https://javafx-jira.kenai.com/browse/RT-27794) soon (currently it's 
> built with JDK 7).  As soon as JavaFX code are changed to reference 
> PlatformLogger.Level enum instead, we can remove the deprecated 
> methods and change the PlatformLogger constants.
>
> JavaFX 2.2.x doesn't use sun.util.logging and so this has no impact to 
> it.  In any case, JavaFX 2.2.x only runs either bundled with a 
> corresponding JDK 7u release, or as a standalone library for JDK 6 only.
>
> Thanks
> Mandy
>