I was meant to post this earlier but got side-tracked by something else.

On Mar 17, 2011, at 11:43 AM, Manik Surtani wrote:

> 
> On 17 Mar 2011, at 08:30, Galder Zamarreño wrote:
> 
>>> 
>>> Is it to do with classloader leaks?  If so, a weak map could be used for 
>>> this table... 
>> 
>> You misunderstood what I meant. By annotation scanning I meant that we won't 
>> be scanning the entire classpath for user classes that have @Marshaller, 
>> right? I mean, we don't do like an EJB container that goes through 
>> deployments checking for all @EJB classes, cos that would be very expensive 
>> and it's not our business. So, back to my question, the users will still 
>> need to give us the list of user defined externalizers. Sure, we can do 
>> annotation scanning on that specific list of classes. 
> 
> Ah I see what you mean.  Initially I thought you'd only need to register the 
> externaliser when you first encounter a new type (i.e., when a user defined 
> type is first encountered with a put()), but this may not be the case since 
> on the remote node it may see the a new magic number which may not be 
> registered, and then you have a problem.

Yeah and it's interesting that you raise this cos it kinda links with a comment 
Eduardo made a few weeks ago, see 
http://lists.jboss.org/pipermail/infinispan-dev/2011-February/007414.html

We're currently forced to know the Externalizers in advance, so they need to be 
given to us at startup. This causes problem to Eduardo & co.

> 
>> My point is that it might look nice that users can use annotations to define 
>> some externalizer properties (id and typeClasses) but they're not getting as 
>> much out of it as they'd with @EJBs in an EJB container cos they have to 
>> list the externalizers somehow. Again, unless you wanna get into classpath 
>> annotation search...
> 
> Yeah CP scanning does suck, but it is something to think about.  Maybe follow 
> a SEAM-like approach and only scan jars that have a certain file present in 
> its META-INF?  WDYT?
> 
> Cheers
> Manik
> 
> --
> Manik Surtani
> [email protected]
> twitter.com/maniksurtani
> 
> Lead, Infinispan
> http://www.infinispan.org
> 
> 
> 
> 
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--
Galder Zamarreño
Sr. Software Engineer
Infinispan, JBoss Cache


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