assertNotNull("Cache is null.", cache);
// Note: because these tests are normally executed without a server, the interceptor
// MBeans are usually not available for use in the tests. Consequently it's necessary
// to obtain references to the interceptors and work with them directly.
CacheLoaderInterceptor loader = TestingUtil.findInterceptor(cache, CacheLoaderInterceptor.class);
assertNotNull("CacheLoaderInterceptor not found.", loader);
CacheStoreInterceptor store = TestingUtil.findInterceptor(cache, CacheStoreInterceptor.class);
assertNotNull("CacheStoreInterceptor not found.", store);
// verify cache loader statistics for entries loaded into cache
int miss = 0;
int load = 0;
int stores = 5;
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// now try retrieving a valid attribute and an invalid attribute
assertNotNull("Retrieval error: expected to retrieve " + CAPITAL + " for " + AUSTRIA, cache.get(AUSTRIA, CAPITAL));
assertNull("Retrieval error: did not expect to retrieve " + AREA + " for " + AUSTRIA, cache.get(AUSTRIA, AREA));
load++; // since we did a get on a non-existent key which triggered a load
// verify statistics after retrieving entries - misses should still be same since nodes were already loaded
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// now try retrieving an attribute for an invalid node
assertNull("Retrieval error: did not expect to retrieve " + CAPITAL + " for " + POLAND, cache.get(POLAND, CAPITAL));
// verify statistics for after retrieving entries - misses should now be +1 after attempt to load Poland
miss++;
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// now evict Austria and confirm that it's no longer in cache
cache.evict(AUSTRIA, false);
assertNull("Retrieval error: did not expect to find node " + AUSTRIA + " in cache", cache.peek(AUSTRIA, false));
// now try retrieving its attributes again - first retrieval should trigger a cache load
assertNotNull("Retrieval error: expected to retrieve " + CAPITAL + " for " + AUSTRIA, cache.get(AUSTRIA, CAPITAL));
assertNotNull("Retrieval error: expected to retrieve " + CURRENCY + " for " + AUSTRIA, cache.get(AUSTRIA, CURRENCY));
// verify statistics after retrieving evicted entry - loads should now be +1
load++;
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// now remove Austria and confirm that it's not in cache or loader
cache.removeNode(AUSTRIA);
assertNull("Retrieval error: did not expect to find node " + AUSTRIA + " in cache", cache.peek(AUSTRIA, false));
assertFalse("Retrieval error: did not expect to find node " + AUSTRIA + " in loader", cl.exists(AUSTRIA));
// verify statistics after removing entry - should be unchanged
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// now try retrieving attributes again - each attempt should fail and cause a miss since node is now removed
assertNull("Retrieval error: did not expect to retrieve " + CAPITAL + " for " + AUSTRIA, cache.get(AUSTRIA, CAPITAL));
assertNull("Retrieval error: did not expect to retrieve " + CURRENCY + " for " + AUSTRIA, cache.get(AUSTRIA, CURRENCY));
// verify statistics after trying to retrieve removed node's attributes - should be two more misses
miss += 2;
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// add a new node - this should cause a store
stores++;
cache.put(POLAND, new HashMap<String, Object>());
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// add two attributes - this should cause two stores
// plus one load as we're doing put(k, v)
stores += 2;
load++;
cache.put(POLAND, CAPITAL, "Warsaw");
cache.put(POLAND, CURRENCY, "Zloty");
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// evict Poland and then try to retrieve an invalid attribute - this will cause a load as the node is restored
load++;
cache.evict(POLAND, false);
assertNull("Retrieval error: did not expect to retrieve " + AREA + " for " + POLAND, cache.get(POLAND, AREA));
assertEquals("CacheLoaderLoads count error: ", load, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error: ", miss, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error: ", stores, store.getCacheLoaderStores());
// reset statistics
loader.resetStatistics();
store.resetStatistics();
// check the statistics again
assertEquals("CacheLoaderLoads count error after reset: ", 0, loader.getCacheLoaderLoads());
assertEquals("CacheLoaderMisses count error after reset: ", 0, loader.getCacheLoaderMisses());
assertEquals("CacheLoaderStores count error after reset: ", 0, store.getCacheLoaderStores());
}