[rules-users] Help with MatchesEvaluatorsDefinition that caches compiled regular expression patterns
I need some help placing a cache of compiled regular expressions using the
MatchesEvaluatorsDefinition as a starting point.
Just for a test I placed a static map in the class:
static Map<String,Pattern> uglyHack = new HashMap<String,Pattern>();
Then in each of the evaluators I have different versions of:
Pattern p = uglyHack.get(value2);
if (p == null ) {
p = Pattern.compile(value2);
uglyHack.put(value2, p);
}
Matcher m = p.matcher(value1);
return m.matches();
instead of
return value1.matches( value2 );
The time elapsed to inserting objects into the workspace has been cut in half.
.4 seconds -> .2
Has someone already done this "optimization?" Where should the cache be stored?