I have submitted my patch to add a public API for getCallerClass to the JDK mailing list:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-September/020477.html I appreciate anyone who can support it verbally on the list, but of course the most critical test is whether I can get a committer to sponsor my change. Nick On Aug 2, 2013, at 7:59 PM, Paul Benedict wrote: > Wow! I totally forgot about their insane numbering system. All this time, I > thought version 40 was many months in the future. > > On Aug 2, 2013 6:34 PM, "Nick Williams" <nicho...@nicholaswilliams.net> wrote: > I HATE their new numbering system. HATE. > > ABHOR. > > 7u40 comes after 7u25. So, yes, it's the next one. Set to release > mid-September. > > Nick > > On Aug 2, 2013, at 4:59 PM, Gary Gregory wrote: > >> On Thu, Aug 1, 2013 at 10:01 PM, Nick Williams >> <nicho...@nicholaswilliams.net> wrote: >> I can confirm that the JDK team /has/ committed the change to restore >> Reflection.getCallerClass() in Java 7u40: >> >> http://hg.openjdk.java.net/jdk7u/jdk7u40-dev/jdk/rev/244dbaeab45e >> >> So, hurray! Lol. >> >> With Oracle's new demented numbering scheme, how can you tell when this >> version is coming? ;) Is that the next Java 7 or the one after that? >> >> Gary >> >> Nick >> >> On Aug 1, 2013, at 9:48 AM, Remko Popma wrote: >> >>> O(n log n) would not be too bad, but what you're describing sounds more >>> like quadratic time! >>> That's huge, Nick, congrats! That would mean a big speed improvement for >>> the location-based layout patterns in Log4j, they use >>> Thread.currentThread().getStackTrace() under the hood. Nice! >>> >>> -Remko >>> >>> From: Nick Williams <nicho...@nicholaswilliams.net> >>> To: Log4J Developers List <log4j-dev@logging.apache.org> >>> Sent: Thursday, August 1, 2013 10:11 PM >>> Subject: Re: Relfection.getCallerClass >>> >>> Here's something interesting. >>> >>> So the last method I had to write, >>> StackTraceFrame.getStackTrace(Throwable), I finished last night. It's the >>> alternative to Throwable.getStackTrace(). Instead of returning >>> StackTraceElement[] (String for declaring class name), it returns >>> StackTraceFrame[] (Class<?> for declaring class). I expected this to >>> perform about the same or possibly even worse--boy was I wrong. >>> >>> StackTraceFrame.getStackTrace(Throwable) consistently returns in half the >>> time that Throwable.getStackTrace() does. Looking at why that is, I found a >>> HUGE inefficiency in Throwable.getStackTrace(). >>> StackTraceFrame.getStackTrace(Throwable) walks the backtrace 1 time and >>> runs O(n), where n is the number of elements in the stack trace. >>> Throwable.getStackTrace() walks the back trace 1+(n/2) times (first it >>> measures the depth of the back trace in one native method call, then it >>> gets the elements by index in a native method call for each, looping up to >>> that index each time), for an O(nlogn) (I think) running time. Much worse. >>> >>> So ... I improved Throwable.getStackTrace() and cut its running time in >>> half while I was at it. This also resulted in cutting >>> Thread.currentThread().getStackTrace()'s runtime in half. Think they'll >>> appreciate it? :-/ >>> >>> N >>> >>> On Jul 31, 2013, at 4:42 PM, Paul Benedict wrote: >>> >>>> http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-July/019486.html >>>> >>>> >>>> On Wed, Jul 31, 2013 at 4:40 PM, Gary Gregory <garydgreg...@gmail.com> >>>> wrote: >>>> Hm... do you have a URL for this ray of hope? >>>> >>>> Gary >>>> >>>> >>>> On Wed, Jul 31, 2013 at 5:34 PM, Paul Benedict <pbened...@apache.org> >>>> wrote: >>>> Nevermind. I just found it. Lousy browser caching! >>>> >>>> >>>> On Wed, Jul 31, 2013 at 4:33 PM, Paul Benedict <pbened...@apache.org> >>>> wrote: >>>> Did you find this out on the OpenJDK mailing list? I can't find the >>>> information; I may have missed it. >>>> >>>> >>>> On Wed, Jul 31, 2013 at 4:22 PM, Gary Gregory <garydgreg...@gmail.com> >>>> wrote: >>>> KA-POW! Well done, sir. How about we use your mug as the new logo? ;) >>>> >>>> Gary >>>> >>>> >>>> On Wed, Jul 31, 2013 at 4:47 PM, Nick Williams >>>> <nicho...@nicholaswilliams.net> wrote: >>>> A PARTIAL VICTORY! >>>> >>>> They've decide to revert the change to Reflection.getCallerClass for 7u40 >>>> and the rest of 7. Woohoo! >>>> >>>> "What will happen to this method in JDK 8 requires further thought." >>>> >>>> Meanwhile, about 300 lines of Java and 1,000 lines of native code later, >>>> I'm about ready to submit my patch for a public API replacement in Java 8. >>>> >>>> N >>>> >>>> On Jul 29, 2013, at 8:39 AM, Gary Gregory wrote: >>>> >>>>> What a mess :( it seem unlikely new APIs will be added to Java 8 to help >>>>> us, at least based on comments like >>>>> http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-July/019110.html >>>>> >>>>> We might be left with documenting our side with "if you use features x >>>>> and y in this context then the speed will degrade to so and so, here is >>>>> where to ask Oracle to fix it: http:..." >>>>> >>>>> Gary >>>>> >>>>> On Jul 29, 2013, at 9:06, Nick Williams <nicho...@nicholaswilliams.net> >>>>> wrote: >>>>> >>>>>> core-libs-dev >>>> >>>> >>>> >>>> >>>> -- >>>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org >>>> Java Persistence with Hibernate, Second Edition >>>> JUnit in Action, Second Edition >>>> Spring Batch in Action >>>> Blog: http://garygregory.wordpress.com >>>> Home: http://garygregory.com/ >>>> Tweet! http://twitter.com/GaryGregory >>>> >>>> >>>> >>>> -- >>>> Cheers, >>>> Paul >>>> >>>> >>>> >>>> -- >>>> Cheers, >>>> Paul >>>> >>>> >>>> >>>> -- >>>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org >>>> Java Persistence with Hibernate, Second Edition >>>> JUnit in Action, Second Edition >>>> Spring Batch in Action >>>> Blog: http://garygregory.wordpress.com >>>> Home: http://garygregory.com/ >>>> Tweet! http://twitter.com/GaryGregory >>>> >>>> >>>> >>>> -- >>>> Cheers, >>>> Paul >>> >>> >>> >> >> >> >> >> -- >> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org >> Java Persistence with Hibernate, Second Edition >> JUnit in Action, Second Edition >> Spring Batch in Action >> Blog: http://garygregory.wordpress.com >> Home: http://garygregory.com/ >> Tweet! http://twitter.com/GaryGregory >
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