62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
import django
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from django.db.backends import util
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from django_statsd.clients import statsd
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from django_statsd.patches.utils import wrap
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def key(db, attr):
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return 'db.%s.%s.%s' % (db.client.executable_name, db.alias, attr)
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def __getattr__(self, attr):
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"""
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The CursorWrapper is a pretty small wrapper around the cursor.
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If you are NOT in debug mode, this is the wrapper that's used.
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Sadly if it's in debug mode, we get a different wrapper.
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"""
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if django.VERSION < (1, 6) and self.db.is_managed():
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# In Django 1.6 you can't put a connection in managed mode
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self.db.set_dirty()
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if attr in self.__dict__:
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return self.__dict__[attr]
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else:
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if attr in ['execute', 'executemany']:
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return wrap(getattr(self.cursor, attr), key(self.db, attr))
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return getattr(self.cursor, attr)
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def wrap_class(base, super_class=None):
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"""Returns a sub-class of the argument 'base'
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The sub class has its execute and executemany methods will record query timings.
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If the execute and executemany methods you're overriding makes super()
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calls, the argument super_class can be provided to not break things.
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"""
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class Wrapper(base):
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def execute(self, *args, **kwargs):
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with statsd.timer(key(self.db, 'execute')):
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return super(super_class, self).execute(*args, **kwargs)
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def executemany(self, *args, **kwargs):
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with statsd.timer(key(self.db, 'executemany')):
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return super(super_class, self).execute(*args, **kwargs)
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super_class = super_class or Wrapper
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return Wrapper
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def patch():
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"""
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The CursorWrapper is a pretty small wrapper around the cursor.
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If you are NOT in debug mode, this is the wrapper that's used.
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Sadly if it's in debug mode, we get a different wrapper for version earlier than 1.6.
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"""
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if django.VERSION > (1, 6):
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util.CursorDebugWrapper = wrap_class(util.CursorDebugWrapper,
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super_class=util.CursorDebugWrapper)
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util.CursorWrapper = wrap_class(util.CursorWrapper)
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else:
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util.CursorDebugWrapper = wrap_class(util.CursorDebugWrapper)
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util.CursorWrapper.__getattr__ = __getattr__
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