Obtain cache hit and miss statistics

Question

Hi,
     I have a cache developed in-house, which implements the HashMap functionalities of get(key), put(key, object) etc, and in addition, maintains hit and miss counts. I'm trying to replace this cache with Coherence because eventually I wish to migrate to a distributed cache. It's essential, therefore, that I fit Coherence into my application in such a way that though I would currently be using Coherence's local cache functionality, later I should be able to use the distributed cache functionality without any changes to my code. Hence, I'm using CacheFactory to obtain a cache whose config I define in the coherence-config.xml file. Here's my problem: I notice that CacheFactory.getCache() returns an object that implements NamedCache. This interface does NOT support the maintenance of cache hit and miss counts. I need this functionality! How do I work around this?
     Thanks,
     Lakshmi.

Answer 1

Hi Lakshmi,
     It would look something like this:
     // This example uses the default
         // coherence-cache-config.xml which maps all cache
         // names starting with 'local-' to a 'local-scheme'
         String sCacheName = "local-test";
         NamedCache cache = CacheFactory.getCache(sCacheName);
         CacheService service = cache.getCacheService();
         Map mapLocal = ((DefaultConfigurableCacheFactory.Manager) service.getBackingMapManager()).getBackingMap(sCacheName);
         if (mapLocal instanceof LocalCache)
              LocalCache cacheLocal = (LocalCache) mapLocal;
              out("Misses: " + cacheLocal.getCacheMisses());
              }Hope this helps.
     Later,
     Rob Misek
     Tangosol, Inc.
     Message was edited by: rmisek