[Zope] Re: suddenly confused

[Chris McDonough]

On Jan 19, 2008, at 1:39 PM, Dieter Maurer wrote:

> Tres Seaver wrote at 2008-1-18 21:06 -0500:
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>> David Bear wrote:
>>> I'm doing my first zeo setup, and suddenly I'm not sure about my
>>> products directory. Do I put all products in a products directory of
>>> the zeo server or in each zope instance?
>>
>> Normally the ZEO server doesn't need to have access to the products,
>> which are "application code".  The only exception is for products  
>> which
>> define classes having application-level conflict resolution:  in such
>> cases, the ZEO server must be able to import the product (or else the
>> conflict resolution code is not consulted).
>
> As an additional note:
>
>  Zope uses Python import magic to make packages available
>  in "INSTANCE_HOME/Products" as additional products in
>  the "Products" package.
>
>  If some of these products need application specific conflict
>  resolution, the ZEO server needs to activate this
>  import magic -- by importing Zope's "App.FindHomes".

An patch to runzeo that allows INSTANCE_HOME Products to be put on the  
path (but does not require Zope's App.FindHomes is here):

https://bugs.launchpad.net/zope2/+bug/143770

Using this patch, you can create a Products directory in your ZEO's  
instance home and put products in there to service conflict resolution  
while still keeping SOFTWARE_HOME products on the path.  Importing  
App.FindHomes might be a better way to do this.

- C