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# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is Python XPCOM language bindings.
#
# The Initial Developer of the Original Code is
# ActiveState Tool Corp.
# Portions created by the Initial Developer are Copyright (C) 2000, 2001
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Mark Hammond <mhammond@skippinet.com.au> (original author)
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
# This is a demo is how to use the xpcom.server "tracer" facility.
#
# This demo installs a tracer that uses the Python profiler. It then
# creates the Python test component, and references some methods
# and properties. It then dumps the profile statistics.
# This same technique could also be used for debugging, for example.
import profile
p = profile.Profile()
getters = {}
setters = {}
# A wrapper around a function - looks like a function,
# but actually profiles the delegate.
class TracerDelegate:
def __init__(self, callme):
self.callme = callme
def __call__(self, *args):
return p.runcall(self.callme, *args)
# A wrapper around each of our XPCOM objects. All PyXPCOM calls
# in are made on this object, which creates a TracerDelagate around
# every function. As the function is called, it collects profile info.
class Tracer:
def __init__(self, ob):
self.__dict__['_ob'] = ob
def __repr__(self):
return "<Tracer around %r>" % (self._ob,)
def __str__(self):
return "<Tracer around %r>" % (self._ob,)
def __getattr__(self, attr):
ret = getattr(self._ob, attr) # Attribute error just goes up
if callable(ret):
return TracerDelegate(ret)
else:
if not attr.startswith("_com_") and not attr.startswith("_reg_"):
getters[attr] = getters.setdefault(attr,0) + 1
return ret
def __setattr__(self, attr, val):
if self.__dict__.has_key(attr):
self.__dict__[attr] = val
return
setters[attr] = setters.setdefault(attr,0) + 1
setattr(self._ob, attr, val)
# Installed as a global XPCOM function that if exists, will be called
# to wrap each XPCOM object created.
def MakeTracer(ob):
# In some cases we may be asked to wrap ourself, so handle that.
if isinstance(ob, Tracer):
return ob
return Tracer(ob)
def test():
import xpcom.server, xpcom.components
xpcom.server.tracer = MakeTracer
contractid = "Python.TestComponent"
for i in range(100):
c = xpcom.components.classes[contractid].createInstance().queryInterface(xpcom.components.interfaces.nsIPythonTestInterface)
c.boolean_value = 0
a = c.boolean_value
c.do_boolean(0,1)
print "Finshed"
p.print_stats()
print "%-30s%s" % ("Attribute Gets", "Number")
print "-" * 36
for name, num in getters.items():
print "%-30s%d" % (name, num)
print "%-30s%s" % ("Attribute Sets", "Number")
print "-" * 36
for name, num in setters.items():
print "%-30s%d" % (name, num)
test()
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