Re: twisted

On Wed, 30 Mar 2005, Steven Armstrong wrote:
> On 03/29/05 21:27, will guaraldi wrote:
>>
>> Well, what do you mean by "well known interfaces" between the different 
>> parts of the system?  Can you give any examples?
>
> I found it difficult to write my nevow-renderer in a generically working 
> way cause the plugin system is so flexible that you can do just about 
> anything at any time from within a plugin. That ment that their could be 
> special cases depending on what plugins are loaded. The result is that I 
> can use the nevow-renderer but it's unlikely that anybody else, with 
> only a slitely different setup, could run it.
>
> For example the comments plugin directly accesses the renderer's 
> outputTemplate methods. It also changes the loaded templates on the fly. 
> As I wanted to use a nevow-template and renderer, which work totally 
> different than the standard engine, this made things difficult. There's 
> no way I could have implemented this without hacking the comments 
> plugin.
>
> It would have been much easier if plugins would not change or access the 
> internals in such a way, and instead tell the core system to do that for 
> them.
>
> If I have to hack plugins to work with changes made to the underlying 
> system that's IMHO a sign that "well known interfaces" are missing. On 
> the other hand, maybe I was just trying to do something that's totally 
> incompatible with Pyblosxoms design.
>
> I don't know if this is a good example or if I was able to explains my 
> thoughts well enough.

Yeah--that explains it pretty well.  I'm not sure what to say here other 
than I don't think PyBlosxom is really fleshed out enough to provide 
all the well-known interfaces we're probably going to need.  We've always 
kind of figured things out as we went along.

I'll speak to the comments issue in a separate email.

/will


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