[Zope3-dev] Twisted Publisher and Zope 2

[Jim Fulton]

Martijn Faassen wrote:
> Chris Withers wrote:
> 
>> Jim Fulton wrote:
>>
>>> The most important project here, IMO, is to rewire Zope 2
>>> to use the Zope 3 publisher.  And, of course, to update the
>>> Zope 3 publisher with features from the Zope 2 publisher that
>>> are missing from the Zope 3 publisher (e.g. streaming).
>>
>>
>> +10
>>
>> Please don't anyone write a "new zope 2" publisher, lets just get the 
>> Zope 3 one to replace the Zope 2 one and keep bringing the two 
>> branches closer and closer together :-)
> 
> 
> I support any scenario where we can replace bits of Zope 2 with Zope 3. :)
> 
> I think we'll see a scenario where old new will coexist for a while. The 
> Zope 2 publisher has all kinds of wonderful cruft in it, and each bit of 
> cruft is likely to be doing something useful for someone somewhere. For 
> backwards compatibility reasons, we'll need to continue to support it 
> for some time.
> 
> That's a problem for WSGI, I guess, though, if the Zope 3 publisher is 
> needed for WSGI support... Perhaps we can do something like "from this 
> point in my publication process, dive into the Zope 2 publisher, and 
> forget about Zope 3 for now". Applications that rely on Zope 2 publisher 
> features can have this toggled on.
> 
> Then again, my understanding of the publisher model in both Zopes is 
> definitely incomplete. What's your thinking concerning backward 
> compatibility, Jim?

We need it.  We also need a single publisher.  We are (almost) at the beginning
of a new development cycle.  We should be ambitios and try to make it
possible to use the Zope 3 puublisher in Zope 2 *and* provide backward
compatibility.  I'm not positive that it is possible, but I am extremely
hopeful that it is and think it's worth a try.  We need to start soon
though and not wait until a month before the feature freeze.

Jim

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