[infinispan-dev] ISPN-78 and Large Object Support/Streaming API

[Manik Surtani]

On 20 May 2010, at 16:14, Galder Zamarreno wrote:

> The following ties in a bit with my comment yesterday about return values:
> 
> If these two methods would always return null, you'd never be able to find out whether a remove/replace worked on its own. Returning previous value would indeed not work, but you could still return a marker different to null.

The problem with markers is typing.  Returning a boolean, for example, would make a lot of sense.  But returning anything else would in effect be used *as a boolean*.  Using any other return type for this would be abuse of the type system.


> 
> V remove(K key); // except that this will always return a null
> V replace(K key, V value); // except that this will always return a null
> 
> So, if remove worked cos the key was present, a marker value would be returned, otherwise if the key was not present, null would be returned.
> 
> Cheers,
> 
> ----- "Manik Surtani" <manik at jboss.org> wrote:
> 
>> I have put together a brief design for ISPN-78.  Please take a look,
>> it is on the wiki:
>> 
>> 	https://community.jboss.org/wiki/LargeObjectSupport
>> 
>> I have also deferred ISPN-78 to 5.0.0 rather than 4.1.0 as I'd rather
>> not hold up 4.1.0 for new features at this stage.  
>> 
>> Please have a look at the designs and let me know what you think - or
>> comment on the wiki page.
>> 
>> Cheers
>> Manik
>> --
>> Manik Surtani
>> manik at jboss.org
>> Lead, Infinispan
>> Lead, JBoss Cache
>> http://www.infinispan.org
>> http://www.jbosscache.org
>> 
>> 
>> 
>> 
>> 
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--
Manik Surtani
manik at jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
http://www.jbosscache.org