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From "Graham Dumpleton (JIRA)" <j...@apache.org>
Subject [jira] Closed: (MODPYTHON-10) Continual reloading of modules
Date Sun, 05 Mar 2006 04:36:44 GMT
     [ http://issues.apache.org/jira/browse/MODPYTHON-10?page=all ]
     
Graham Dumpleton closed MODPYTHON-10:
-------------------------------------


> Continual reloading of modules
> ------------------------------
>
>          Key: MODPYTHON-10
>          URL: http://issues.apache.org/jira/browse/MODPYTHON-10
>      Project: mod_python
>         Type: Bug
>     Versions: 3.1.3
>     Reporter: Graham Dumpleton
>     Priority: Minor
>      Fix For: 3.2.7

>
> From mailing list post.
> Continual reloading of modules
> ------------------------------
> Create a subdirectory called "publisher". In that directory create a
> ".htaccess" file containing:
>   SetHandler python-program
>   PythonHandler mod_python.publisher
>   PythonDebug On
> Now create two subdirectories "subdir-1" and "subdir-1". In both of these
> subdirectories create an "index.py" file which contains:
>   import os
>   def index():
>     return os.getpid(),__file__
> Restart Apache to clear any cached modules and then cycle between the URLs
> corresponding to the two subdirectories. In my case this is:
>   /~grahamd/publisher/subdir-1
>   /~grahamd/publisher/subdir-2
>   /~grahamd/publisher/subdir-1
>   /~grahamd/publisher/subdir-2
>   ...
> The output for each page was in turn:
>   (462, '/Users/grahamd/Sites/publisher/subdir-1/index.py')
>   (462, '/Users/grahamd/Sites/publisher/subdir-2/index.py')
>   (462, '/Users/grahamd/Sites/publisher/subdir-1/index.pyc')
>   (462, '/Users/grahamd/Sites/publisher/subdir-2/index.pyc')
>   ...
> If you look at the Apache error log file you will see something like:
>   [Tue Jan 25 09:03:45 2005] [notice] mod_python: Creating 32 session mutexes
>   based on 4 max processes and 25 max threads.
>   [Tue Jan 25 09:03:45 2005] [notice] Apache/2.0.51 (Unix) mod_python/3.1.3
>   Python/2.3 configured -- resuming normal operations
>   [Tue Jan 25 09:04:02 2005] [notice] mod_python: (Re)importing module
>   'mod_python.publisher'
>   [Tue Jan 25 09:04:02 2005] [notice] mod_python: (Re)importing module 'index'
>   with path set to '['/Users/grahamd/Sites/publisher/subdir-1']'
>   [Tue Jan 25 09:04:16 2005] [notice] mod_python: (Re)importing module 'index'
>   with path set to '['/Users/grahamd/Sites/publisher/subdir-2']'
>   [Tue Jan 25 09:04:26 2005] [notice] mod_python: (Re)importing module 'index'
>   with path set to '['/Users/grahamd/Sites/publisher/subdir-1']'
>   [Tue Jan 25 09:04:40 2005] [notice] mod_python: (Re)importing module 'index'
>   with path set to '['/Users/grahamd/Sites/publisher/subdir-2']'
> You will see how as one cycles between the two URLs corresponding to the
> modules, that the modules are reimported everytime.
> Note that I ensured that only one Apache server process was initially
> started so that all requests served by same process. One can also see this
> is the response, which includes the process ID of the server process.
> Overall what is returned is correct, but it isn't efficient because each
> request is triggering a module import.

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