I'm looking at fixes for
http://nagoya.apache.org/bugzilla/show_bug.cgi?id=21091
1. Synchronize the entire RequestUtils.getModulePrefixes() method.
OR
2. The first thing the method does is checks for prefixes in the context
String[] prefixes = (String[]) context.getAttribute(PREFIXES_KEY);
if (prefixes != null) {
return prefixes;
}
What if the rest of the code below that was inside a
synchronized(RequestUtils.class) {} block and the first thing that block
does is perform the check again?
Is this considered double checked locking? It's slightly different than
the examples I've seen because we would be looking up the value in the
context instead of testing a member variable for null.
I think solution 2 will work but I want to make sure.
Thanks,
David
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