1 import hotshot, time, os

     2 from django.core.handlers.modpython import ModPythonHandler

     3 

     4 PROFILE_DATA_DIR = "/var/log/cmsprofile"

     5 

     6 def handler(req):

     7     '''

     8     Handler that uses hotshot to store profile data.

     9 

    10     Stores profile data in PROFILE_DATA_DIR.  Since hotshot has no way (that I

    11     know of) to append profile data to a single file, each request gets its own

    12     profile.  The file names are in the format <url>.<n>.prof where <url> is

    13     the request path with "/" replaced by ".", and <n> is a timestamp with

    14     microseconds to prevent overwriting files.

    15 

    16     Use the gather_profile_stats.py script to gather these individual request

    17     profiles into aggregated profiles by request path.

    18     '''

    19     profname = "%s.%.3f.prof" % (req.uri.strip("/").replace('/', '.'), time.time())

    20     profname = os.path.join(PROFILE_DATA_DIR, profname)

    21     prof = hotshot.Profile(profname)

    22     return prof.runcall(ModPythonHandler(), req)