Automatic construction of handler class.
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Key: MODPYTHON-208
URL: http://issues.apache.org/jira/browse/MODPYTHON-208
Project: mod_python
Issue Type: Improvement
Components: core
Affects Versions: 3.2.10, 3.3
Reporter: Graham Dumpleton
When defining a mod_python handler, it is possible to supply a dotted path for
the actual handler function to be used. Ie:
PythonHandler module::instance.function
when determing the handler to execute, it will use the dotted path to traverse
any object hierarchy. Thus the above will execute "function()" of the object
instance called "instance" in the module called "module".
If instead one provides:
PythonHandler module::class.function
where 'class' is the name of a class type, then referencing 'function' within
that type will result in an instance of the class automatically being created
just for the current request, with "function()' then being called on that
transient instance of the class.
For an instance of the class to be created in this way, one must access a
member function of the class type. If an instance of the class is callable in
its own right, ie., has a __call__() method, it is not however possible to say:
PythonHandler module::class
To get that to work, you instead have to use:
PythonHandler module::class.__call__
First change should be that if a class is callable through having a __call__()
method, then it should not be necessary to reference the __call__() method
explicitly, instead, referencing the class type itself should be enough. Ie.,
using
PythonHandler module::class
should work.
Note that the code will have to be smart enough to handle both new and old
style classes.
The next issue with this automatic initialisation of a class type is that
although the __call__() method needs to accept the 'req' argument, the
constructor has to as well if it is being created automatically. The code
should allow for the case where the class doesn't want to have to deal with the
'req' object as an argument to the constructor. Ie., it should be optional for
the constructor, although always still required for the actual function of the
class instance being called.
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