[infinispan-dev] About size()

[Radim Vansa]

Hi,

recently we had a discussion about what size() returns, but I've 
realized there are more things that users would like to know. My 
question is whether you think that they would really appreciate it, or 
whether it's just my QA point of view where I sometimes compute the 
'checksums' of cache to see if I didn't lost anything.

There are those sizes:
A) number of owned entries
B) number of entries stored locally in memory
C) number of entries stored in each local cache store
D) number of entries stored in each shared cache store
E) total number of entries in cache

So far, we can get
B via withFlags(SKIP_CACHE_LOAD).size()
(passivation ? B : 0) + firstNonZero(C, D) via size()
E via distributed iterators / MR
A via data container iteration + distribution manager query, but only 
without cache store
C or D through 
getComponentRegistry().getLocalComponent(PersistenceManager.class).getStores()

I think that it would go along with users' expectations if size() 
returned E and for the rest we should have special methods on 
AdvancedCache. That would of course change the meaning of size(), but 
I'd say that finally to something that has firm meaning.

WDYT?

Radim

-- 
Radim Vansa <rvansa at redhat.com>
JBoss DataGrid QA