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Viewing changes to loggerhead/middleware/profile.py

  • Committer: Matt Nordhoff
  • Date: 2009-11-27 18:06:53 UTC
  • mto: This revision was merged to the branch mainline in revision 397.
  • Revision ID: mnordhoff@mattnordhoff.com-20091127180653-l31gw2hfwyzoekao
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loggerhead/middleware/profile.py
 
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"""Profiling middleware for Paste."""
 
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import threading
 
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from bzrlib.lsprof import profile
 
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class LSProfMiddleware(object):
 
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    """Paste middleware for profiling with lsprof."""
 
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    def __init__(self, app, global_conf=None):
 
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        self.app = app
 
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        self.lock = threading.Lock()
 
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        self.__count = 0
 
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    def __run_app(self, environ, start_response):
 
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        app_iter = self.app(environ, start_response)
 
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        try:
 
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            return list(app_iter)
 
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        finally:
 
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            if getattr(app_iter, 'close', None):
 
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                app_iter.close()
 
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    def __call__(self, environ, start_response):
 
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        """Run a request."""
 
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        self.lock.acquire()
 
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        try:
 
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            ret, stats = profile(self.__run_app, environ, start_response)
 
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            self.__count += 1
 
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            stats.save("%d-stats.callgrind" % (self.__count,), format="callgrind")
 
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            return ret
 
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        finally:
 
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            self.lock.release()