|
Graham Dumpleton
graham.dumpleton at gmail.com
Mon Jul 28 07:00:09 EDT 2008
2008/7/28 bharath venkatesh <bharathv6.project at gmail.com>: > > Hi all, > I am using mod python and publisher handler for handling request .. > I want to load to some configuration so that this configuration is used for > all the request ... > so i placed the all the configuration in a .py file and imported it .. and > also i am doing some initialization in this file .. so i want it to be > imported only once .. > but apache reimports when a request occurs after a gap of certain time .. > it doesn't reimport if the request occurs continuously .. this is > toleratable if i am only l loading configuration but i am doing > initialization also .. so if want to write into a file using > open("filename","w") .. if i place this line in the file i am importing > then... the file gets truncated each time the the file is imported ... this > is not desirable .. > i tried even setting PythonAutoReload off but still apache was reimporting > the module > i tried using PythonImport directive .. (eg PythonImport > /home/bharath/config.py /usr/bin/python2.5 ) couldn't figure out how to get > it work .. if i place the config.py file in a different directive than the > directive in which the handler is placed(assuming that apache will import > this module during start up as it does for library modules ) .. i am > getting a import error and also if i place the config.py in the same > directory that of the handler and if import it .. apache reimports it as > usuall ... > > how to let apache import a module only once as it does for python library > modules but apache should reimport it the when changes are made in the file > that is imported ... You misunderstand how Apache works. Apache is a multiprocess web server, it also recycles processes and/or creates new ones as necessary. Thus, a code file although it may be loaded only once by a process, can be getting loading by other processes created by Apache as well. The lifetime of these processes can all overlap with each over and not sequential. Read: http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading This is from mod_wsgi documentation, but most also applies to mod_python. Only bit that doesn't is mod_wsgi daemon mode as no equivalent in mod_python. Graham
|