[infinispan-dev] Dropping AtomicMap/FineGrainedAtomicMap

[Galder Zamarreño]

On 27 Jan 2014, at 11:27, Dan Berindei <dan.berindei at gmail.com> wrote:

> I think it's way too early to discuss removing FineGrainedAtomicMap and AtomicMap, as long as we don't have a concrete alternative with similar properties.

You have a point there, but we can’t ignore the feedback that says that atomic maps are not being used because they are buggy, and instead they are using grouping.

Deeply, I think we have two ways of doing the same thing, which is confusing from my POV, and one of them is not being used enough, or we’re not fixing the stuff there. 

Regardless of whether it’s too early or not, this email is trying to spark a consolidation of the two technologies into a single solution that works for everyone and we maintained it actively :)

> Cache.getGroup(groupName) is just a method name at this point, we don't have any idea how it will compare to AtomicMap/FineGrainedAtomicMap from a transaction isolation or performance perspective. BTW, do we really need the group name to be a String?
> 
> A good way to prove that the grouping API is a proper replacement for the atomic maps would be to replace the usage of atomic maps in the Tree module with the grouping API. Unless we plan to drop the Tree module completely…

Tree was only ever meant as a bridge for JBC users to move to Infinispan. Paul F et al tried to build HTTP sessions on top of that, it didn’t work. Then they tried to do it on top of Atomic Maps, and it didn’t work either, and finally they’re using grouping and seems to work?

Cheers,

> 
> Cheers
> Dan
> 
> 
> 
> On Wed, Jan 22, 2014 at 2:45 PM, Mircea Markus <mmarkus at redhat.com> wrote:
> 
> On Jan 21, 2014, at 8:42 PM, Vladimir Blagojevic <vblagoje at redhat.com> wrote:
> 
> > I agree with Erik here. Deltas are used in M/R and I've never detected
> > any problems so far.
> > On 1/21/2014, 1:39 PM, Erik Salter wrote:
> >> Please don't remove the Delta stuff.  That's quite useful, especially for
> >> large collections.
> 
> +1 to keep DeltaAware. Thanks for the feedbak
> 
> >>
> >> Erik
> >>
> >
> > _______________________________________________
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> > infinispan-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/infinispan-dev
> 
> Cheers,
> --
> Mircea Markus
> Infinispan lead (www.infinispan.org)
> 
> 
> 
> 
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--
Galder Zamarreño
galder at redhat.com
twitter.com/galderz

Project Lead, Escalante
http://escalante.io

Engineer, Infinispan
http://infinispan.org