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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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© 2006-2015 Andrew Cooke (site) / post authors (content).

Java Double Checked Locking Fixed

From: "andrew cooke" <andrew@...>

Date: Thu, 10 Nov 2005 16:41:56 -0300 (CLST)

I guess this is old news, but it looks like the Java memory model has been
fixed in 1.5.  This article explains things -
http://www-128.ibm.com/developerworks/java/library/j-jtp03304/ - and
here's the JSR FAQ entry -
http://www.cs.umd.edu/users/pugh/java/memoryModel/jsr-133-faq.html#dcl

Both recommend using the "Initialization On Demand Holder idiom"
incidentally, which is a new one to me.

Depressingly, this came up in the context of a dicussion with a co-worker
whose response to "why is you code messy [description of messiness
elided]?" was "it's in the pattern".  So patterns are no longer something
that help us see think more clearly, but rather excuses to not think...

Ho hum,
Andrew



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