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.

> 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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