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Groups > comp.lang.java.programmer > #7091
| From | "vbhavsar@gmail.com" <vbhavsar@gmail.com> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Singleton Pattern |
| Date | 2011-08-13 13:56 -0700 |
| Organization | http://groups.google.com |
| Message-ID | <3be6e6cf-fa32-4503-9457-b0a1caef8f29@w11g2000vbp.googlegroups.com> (permalink) |
People have been coming up with creative solutions to lazily implement
the singleton pattern in a thread-safe way. We have seen things like
double-checked locking and creating instance via a single-elemnt enum
type.
I have thought of yet another way to implement this in a lazy and
thread-safe way. I haven't seen this proposed anywhere and it seems to
work unless I am missing something. Here it goes:
public class Singleton {
private static Singleton _instance;
private Singleton(){}
private synchronized static void createInstance(){
_instance = new Singleton();
}
public static Singleton getInstance(){
if (_instance == null){
createInstance();
}
return _instance;
}
}
The synchronized createInstance() method would eliminate the need to
do double-checked locking and the synchronization would happen only
when multiple threads call getInstance() before _instance has been
instantiated.
Anyone see any issues with this?
Back to comp.lang.java.programmer | Previous | Next — Next in thread | Find similar
Singleton Pattern "vbhavsar@gmail.com" <vbhavsar@gmail.com> - 2011-08-13 13:56 -0700
Re: Singleton Pattern markspace <-@.> - 2011-08-13 14:41 -0700
Re: Singleton Pattern Patricia Shanahan <pats@acm.org> - 2011-08-13 14:48 -0700
Re: Singleton Pattern Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-08-13 16:43 -0700
Re: Singleton Pattern Ian <m4r35n357@gmail.com> - 2011-08-15 15:00 +0100
Re: Singleton Pattern Lew <lewbloch@gmail.com> - 2011-08-15 07:56 -0700
Re: Singleton Pattern Patricia Shanahan <pats@acm.org> - 2011-08-15 22:07 -0700
Re: Singleton Pattern Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-08-16 00:09 -0700
Re: Singleton Pattern Patricia Shanahan <pats@acm.org> - 2011-08-16 06:15 -0700
Re: Singleton Pattern Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-08-16 06:57 -0700
Re: Singleton Pattern Patricia Shanahan <pats@acm.org> - 2011-08-16 09:25 -0700
Re: Singleton Pattern Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-08-16 18:10 -0700
Re: Singleton Pattern Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-08-13 20:56 -0400
Re: Singleton Pattern Lew <lewbloch@gmail.com> - 2011-08-13 21:12 -0700
Re: Singleton Pattern Rajeev <rajeev.nospam@gmail.com> - 2011-08-14 06:37 -0700
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