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Groups > comp.lang.java.programmer > #18562

Re: Wormholes

From markspace <-@.>
Newsgroups comp.lang.java.programmer
Subject Re: Wormholes
Date 2012-09-05 17:34 -0700
Organization A noiseless patient Spider
Message-ID <k28r3m$reg$1@dont-email.me> (permalink)
References <0ska4895k2mp2j5fb5p4qnue7lsbdpoeoo@4ax.com> <85zk56mgi1.fsf@teletu.it.nospam.invalid> <edoc481db6k0uqlqlvs0bs3kjj0tj64cn4@4ax.com>

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On 9/4/2012 1:20 PM, Roedy Green wrote:
> On Tue, 04 Sep 2012 08:47:18 +0200, Zermelo
> <zermelo@teletu.it.nospam.invalid> wrote, quoted or indirectly quoted
> someone who said :
>
>> Add a static variable to x accessible to y.
>
> it would have to have default scope.  I hoping there was a technique


I don't think default scope would work.  Consider the case where 
multiple threads call the method in question.  If the second thread 
over-writes the first thread's value before it gets used, you'll have 
serious errors.

Something like a ThreadLocal is required here.  Something that simulates 
the call stack frame.


> that would behave like that, but which would not expose the variable
> to the entire package, when really only one method should use that
> variable.
>
> The techniques that I can think of  are default scope variable or pass
> value down call chain to where it is used.   Are there any others?


Is there any way you can show us the code?  I'm curious as to why it's 
so hard to refactor.


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Thread

Wormholes Roedy Green <see_website@mindprod.com.invalid> - 2012-09-03 18:12 -0700
  Re: Wormholes eric@invalid.com (EricF) - 2012-09-04 02:06 +0000
    Re: Wormholes Roedy Green <see_website@mindprod.com.invalid> - 2012-09-04 10:08 -0700
    Re: Wormholes Wanja Gayk <brixomatic@yahoo.com> - 2012-09-09 13:55 +0200
  Re: Wormholes Arne Vajhøj <arne@vajhoej.dk> - 2012-09-03 22:34 -0400
    Re: Wormholes Stuart <DerTopper@web.de> - 2012-09-04 12:15 +0200
  Re: Wormholes markspace <-@.> - 2012-09-03 21:00 -0700
    Re: Wormholes Robert Klemme <shortcutter@googlemail.com> - 2012-09-04 07:08 +0200
  Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-04 08:47 +0200
    Re: Wormholes Lew <noone@lewscanon.com> - 2012-09-04 03:10 -0700
      Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-04 16:09 +0200
        Re: Wormholes Gene Wirchenko <genew@ocis.net> - 2012-09-04 08:34 -0700
          Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-04 17:46 +0200
            Re: Wormholes Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-09-04 09:31 -0700
        Re: Wormholes Lew <lewbloch@gmail.com> - 2012-09-04 11:14 -0700
        Re: Wormholes Arne Vajhøj <arne@vajhoej.dk> - 2012-09-04 19:59 -0400
    Re: Wormholes Roedy Green <see_website@mindprod.com.invalid> - 2012-09-04 13:20 -0700
      Re: Wormholes Arne Vajhøj <arne@vajhoej.dk> - 2012-09-04 20:00 -0400
      Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-05 09:01 +0200
      Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-05 09:02 +0200
      Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-05 09:02 +0200
        Re: Wormholes Zermelo <zermelo@teletu.it.nospam.invalid> - 2012-09-05 09:03 +0200
      Re: Wormholes markspace <-@.> - 2012-09-05 17:34 -0700
  Re: Wormholes Steven Simpson <ss@domain.invalid> - 2012-09-04 14:18 +0100
    Re: Wormholes Robert Klemme <shortcutter@googlemail.com> - 2012-09-05 21:51 +0200
      Re: Wormholes Steven Simpson <ss@domain.invalid> - 2012-09-05 23:26 +0100
        Re: Wormholes Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-09-06 09:32 +0000
          Re: Wormholes Steven Simpson <ss@domain.invalid> - 2012-09-06 11:47 +0100
            Re: Wormholes Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-09-06 15:10 +0000
              Re: Wormholes Steven Simpson <ss@domain.invalid> - 2012-09-06 20:12 +0100
                Re: Wormholes Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-09-06 21:08 +0000
  Re: Wormholes Nigel Wade <nmw@ion.le.ac.uk> - 2012-09-04 17:26 +0100
  Re: Wormholes Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-09-04 09:28 -0700
  Re: Wormholes David Lamb <dalamb@cs.queensu.ca> - 2012-09-04 16:54 -0400

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