[infinispan-dev] JBoss Libra

[Sanne Grinovero]

On 6 February 2012 14:44, Mircea Markus <mmarkus at redhat.com> wrote:
>
>
> ----- Original Message -----
>> From: "Sanne Grinovero" <sanne at infinispan.org>
>> To: "infinispan -Dev List" <infinispan-dev at lists.jboss.org>
>> Sent: Saturday, February 4, 2012 10:08:16 PM
>> Subject: Re: [infinispan-dev] JBoss Libra
>>
>> On 4 February 2012 14:57, Manik Surtani <manik at jboss.org> wrote:
>> > This is very similar to storeAsBinary.  If this is set to true,
>> > then keys and values are serialized and stored as a
>> > MarshalledValue which contains the resulting byte[].  So rather
>> > than restrict to just byte[] types, we could restrict to:
>> >
>> >  * byte[] or any other primitive, primitive array or String
>> >  * OR, if storeAsBinary is set to true.
>>
>> +1, the family of known sizes can be extended. We could even do a
>> recursive calculation and ask the registered Externalizer for the
>> specific type; it's unlikely we can have this information returned by
>> all externalizers but many could be able to handle a fairly accurate
>> estimate.
> I'm not sure I get the "family of known sizes" bit. If you have storeAsBinary set to true you know exactly the size the size that given object has in memory. Or are you refering at the situation whre storeAsBinary is set to false?

Yes, with storeAsBinary=false. I didn't think about the details, just
suggesting that there are many more cases in which the size can be
well known even if it's not a byte[].

For example, the Externalizer interface could provide this information
in many cases. Maybe we could even use JBoss Libra at build time to
"weight" all internal and some other common types and fold this
information in the provided externalizers, so to take advantage of its
capabilities but not require the annotation processor to be used by
Infinispan users.

--Sanne