[Zope] Re: Zeo and conflict resolution (was "suddenly confused")

[Tres Seaver]

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Ricardo Newbery wrote:
> Okay, then assuming you've installed ZEO from Zope software,  
> if your third-party product includes conflict resolution by  
> instantiating a class defined in the Zope product directory, then is  
> it also safe to assume that this product resolution is still  
> available to the ZEO server?  For example, if I have the following in  
> MyProduct:
> 
> from BTrees import Length
> 
> class MyClass(...):
>      _count = None
> 
>      def incrementCount(self):
>          if self._count is None:
>              self._count = Length.Length()
>          self._count.change(1)
> 
>      def getCount(self):
>          return self._count()
> 
> Then do I have to make MyProduct.MyClass available to ZEO or is it  
> enough that BTrees.Length is available?

That is enough:  the Length class derives from Persistent, which means
that handle their own conflict resolution:  as long as your product doss
no conflict resolution of its own, it doesn't need to be imported by the
storage server.


Tres.
- --
===================================================================
Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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