Cache.isEmpty() returns wrong result

[tolusha]

I have simple test with not understandable cache behavior. After putting value with 2s lifespan I guess that cache should be empty, but it is not right. With using CachLoader I see that DB not empty and stores value.

But if before cache.isEmpty() call cache.containsKey("key") then cache.isEmpty() returns correct result.

public void testCacheLoader() throws Exception
{

// Create cache manager
GlobalConfiguration myGlobalConfig = new GlobalConfiguration();
EmbeddedCacheManager manager = new DefaultCacheManager();

// Create a cache
Cache cache = manager.getCache();

cache.put("key", "value", 2, TimeUnit.SECONDS);
assertTrue(cache.containsKey("key"));
Thread.sleep(10000 + 500);
assertFalse(cache.isEmpty());
}

[galder.zamarreno]

See Manik's reply in http://community.jboss.org/message/551231#551231

If expiration is used with eviction, removal will happen on next cache operation. Hence data is only deleted when you call containsKey.

[galder.zamarreno]

For future reference, see "Expiration does not work, what is the problem?" in the Infinispan Technical FAQs