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From "Graham Dumpleton (JIRA)" <j...@apache.org>
Subject [jira] Work stopped: (MODPYTHON-117) PythonImport that works for any interpreter.
Date Fri, 17 Mar 2006 04:19:01 GMT
     [ http://issues.apache.org/jira/browse/MODPYTHON-117?page=all ]

Work on MODPYTHON-117 stopped by Graham Dumpleton

> PythonImport that works for any interpreter.
> --------------------------------------------
>
>          Key: MODPYTHON-117
>          URL: http://issues.apache.org/jira/browse/MODPYTHON-117
>      Project: mod_python
>         Type: Wish
>   Components: core
>     Versions: 3.2.7
>     Reporter: Graham Dumpleton
>     Assignee: Graham Dumpleton

>
> Currently PythonImport requires that the name of the interpreter be explicitly named.
If running lots of virtual hosts, where each is dynamically assigned their own interpreter
name automatically, it is a lot of work to have to specify PythonImport directives for all
virtual host interpreters where a particular module needs to be loaded in all interpreters.
> Syntactically, it isn't hard to allow something like:
>   PythonImport moduleforallinterpreters
> or:
>   PythonImport moduleforallinterpreters *
> however the current location where such Python imports are done in mod_python will not
allow this.
> This is because such Python imports are done in the PythonChildInitHandler() function
right after the child process is initialised. The code iterates through the list of imports
and creates interpreters for the named interpreters and loads the modules. Where we want a
module loaded into all modules, we will not actually know the names of all potential modules
in advance at that point so can't do it.
> The logical spot is to to load a module common to all modules in get_interpreter() when
a request is first made for the interpreter. Thus, it may be possible to move the module imports
from PythonChildInitHandler() into get_interpreter().
> One issue that needs to be considered is that currently, having a PythonImport directive
means that any named interpreter is always created at child initialisation, even if a request
never arrives that is processed within the context of that interpreter. It might also be worthwhile
adding syntax which allows one to specify whether a PythonImport should be performed at the
point of child initialisation, or only when a request comes in that requires that specific
interpreter. To keep backward compatability, the default would be at child initialisation
time.
> Not sure what would be a good syntax. The options would be 'child intialisation' and
'interpreter initialisation'. How to express that????

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