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Re: advice on module design

Peter Leonov
March 27, 2010 07:42AM
Hi Manilo,

On 27.03.2010, at 0:07, Manlio Perillo <manlio.perillo@gmail.com> wrote:

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>
> Hi.
>
> As I wrote in a previous message, in an effort to improve the WSGI
> module, I have moved Python support to a separate module:
> http://hg.mperillo.ath.cx/nginx/ngx_python_module
>
> When the module is included in Nginx, the Python interpreter will be
> initialized unconditionally.
>
> The new `ngx_http_wsgi module` now use the "module init" callback
> function, to do its own Python specific initialization (in old version
> this was done in the HTTP post configuration callback), since this is
> the only place where we know the `ngx_python_module` has been fully
> initialized.
>
>
> A different solution is to define a custom "python" directive in the
> `ngx_python_module`, and initialize the Python interpreter here only
> if
> directive is specified in configuration file.
>
> The disadvantage is that:
>
> * I can no more use multiple directives for Python configuration
> (not a big deal)
> * The `ngx_http_wsgi_module must` can no more assume the Python
> interpreter is initialized (again, not a big deal)
>
>
> What is the best solution?
In ngx_http_js_module it works like the second variant, which is
copied from ngx_http_perl_module. Some code that knows about blablabla
module calls ngx_blablabla_init_interpreter() at the exact moment it
going to do something blablabla-related ;) In its turn
ngx_blablabla_init_interpreter() does really init interpreter or just
return the already existed and cached in some global/static variable.
All this modules (perl and javascript) use one global interpreter for
all requests.

Am thinking this is not very sexy approach but a simple and reliable
one.

Gest regards,
Peter.

>
>
> Thanks Manlio
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Subject Author Views Posted

advice on module design

Manlio Perillo 2084 March 26, 2010 05:08PM

Re: advice on module design

Peter Leonov 811 March 27, 2010 07:42AM

Re: advice on module design

Manlio Perillo 825 March 27, 2010 03:00PM

Re: advice on module design

Peter Leonov 1123 March 28, 2010 07:14AM



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