Hello all,
In addressing bug #6229 [1], it transpired that we needed a bounded hash map using LRU heuristics and identity to compute hashmap and object references for equality. Basically, it would be a HashMap merging the qualities of a LRUMap [2] and those of IdentityHashMap [3, 4, 5].
This HashMap will serve as a cache of previously parsed logging messages of type java.lang.String. String has rather slow equals and hash methods, hence the need for an IdentityMap. We need to keep the memory footprint of the cache limited, hence the requirement for the LRU heuristics.
It's a little 2 or 3 day project. If you are interested, please let me know.
[1] http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16229
[2] http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_1/org/apache/commons/collections/map/LRUMap.html
[3] http://java.sun.com/j2se/1.4.2/docs/api/java/util/IdentityHashMap.html
[4] http://ws.apache.org/axis/java/apiDocs/org/apache/axis/utils/IdentityHashMap.html
[5] http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_1/org/apache/commons/collections/map/IdentityMap.html
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