PythonImport that works for any interpreter.
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Key: MODPYTHON-117
URL: http://issues.apache.org/jira/browse/MODPYTHON-117
Project: mod_python
Type: Wish
Components: core
Versions: 3.2
Reporter: 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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