diff options
Diffstat (limited to 'debug_toolbar/utils/tracking')
| -rw-r--r-- | debug_toolbar/utils/tracking/__init__.py | 90 | ||||
| -rw-r--r-- | debug_toolbar/utils/tracking/db.py | 85 |
2 files changed, 175 insertions, 0 deletions
diff --git a/debug_toolbar/utils/tracking/__init__.py b/debug_toolbar/utils/tracking/__init__.py new file mode 100644 index 0000000..db8ff18 --- /dev/null +++ b/debug_toolbar/utils/tracking/__init__.py @@ -0,0 +1,90 @@ +import logging +import time +import types + +def post_dispatch(func): + def wrapped(callback): + register_hook(func, 'after', callback) + return callback + return wrapped + +def pre_dispatch(func): + def wrapped(callback): + register_hook(func, 'before', callback) + return callback + return wrapped + +def replace_call(func): + def inner(callback): + def wrapped(*args, **kwargs): + return callback(func, *args, **kwargs) + + actual = getattr(func, '__wrapped__', func) + wrapped.__wrapped__ = actual + wrapped.__doc__ = getattr(actual, '__doc__', None) + wrapped.__name__ = actual.__name__ + + _replace_function(func, wrapped) + return wrapped + return inner + +def fire_hook(hook, sender, **kwargs): + try: + for callback in callbacks[hook].get(id(sender), []): + callback(sender=sender, **kwargs) + except Exception, e: + # Log the exception, dont mess w/ the underlying function + logging.exception(e) + +def _replace_function(func, wrapped): + if isinstance(func, types.FunctionType): + if func.__module__ == '__builtin__': + # oh shit + __builtins__[func] = wrapped + else: + module = __import__(func.__module__, {}, {}, [func.__module__], 0) + setattr(module, func.__name__, wrapped) + elif getattr(func, 'im_self', None): + # TODO: classmethods + raise NotImplementedError + elif hasattr(func, 'im_class'): + # for unbound methods + setattr(func.im_class, func.__name__, wrapped) + else: + raise NotImplementedError + +callbacks = { + 'before': {}, + 'after': {}, +} + +def register_hook(func, hook, callback): + """ + def myhook(sender, args, kwargs): + print func, "executed + print "args:", args + print "kwargs:", kwargs + register_hook(BaseDatabaseWrapper.cursor, 'before', myhook) + """ + + assert hook in ('before', 'after') + + def wrapped(*args, **kwargs): + start = time.time() + fire_hook('before', sender=wrapped.__wrapped__, args=args, kwargs=kwargs, + start=start) + result = wrapped.__wrapped__(*args, **kwargs) + stop = time.time() + fire_hook('after', sender=wrapped.__wrapped__, args=args, kwargs=kwargs, + result=result, start=start, stop=stop) + actual = getattr(func, '__wrapped__', func) + wrapped.__wrapped__ = actual + wrapped.__doc__ = getattr(actual, '__doc__', None) + wrapped.__name__ = actual.__name__ + + id_ = id(actual) + if id_ not in callbacks[hook]: + callbacks[hook][id_] = [] + callbacks[hook][id_].append(callback) + + _replace_function(func, wrapped)
\ No newline at end of file diff --git a/debug_toolbar/utils/tracking/db.py b/debug_toolbar/utils/tracking/db.py new file mode 100644 index 0000000..4c9ee53 --- /dev/null +++ b/debug_toolbar/utils/tracking/db.py @@ -0,0 +1,85 @@ +import sys +import traceback + +from datetime import datetime + +from django.conf import settings +from django.template import Node +from django.utils import simplejson +from django.utils.encoding import force_unicode +from django.utils.hashcompat import sha_constructor + +from debug_toolbar.utils import ms_from_timedelta, tidy_stacktrace, get_template_info + +# TODO:This should be set in the toolbar loader as a default and panels should +# get a copy of the toolbar object with access to its config dictionary +SQL_WARNING_THRESHOLD = getattr(settings, 'DEBUG_TOOLBAR_CONFIG', {}) \ + .get('SQL_WARNING_THRESHOLD', 500) + +class CursorWrapper(object): + """ + Wraps a cursor and logs queries. + """ + + def __init__(self, cursor, db, logger): + self.cursor = cursor + # Instance of a BaseDatabaseWrapper subclass + self.db = db + # logger must implement a ``record`` method + self.logger = logger + + def execute(self, sql, params=()): + start = datetime.now() + try: + return self.cursor.execute(sql, params) + finally: + stop = datetime.now() + duration = ms_from_timedelta(stop - start) + stacktrace = tidy_stacktrace(traceback.extract_stack()) + _params = '' + try: + _params = simplejson.dumps([force_unicode(x, strings_only=True) for x in params]) + except TypeError: + pass # object not JSON serializable + + template_info = None + cur_frame = sys._getframe().f_back + try: + while cur_frame is not None: + if cur_frame.f_code.co_name == 'render': + node = cur_frame.f_locals['self'] + if isinstance(node, Node): + template_info = get_template_info(node.source) + break + cur_frame = cur_frame.f_back + except: + pass + del cur_frame + + # We keep `sql` to maintain backwards compatibility + self.logger.record(**{ + 'alias': getattr(self, 'alias', 'default'), + 'sql': self.db.ops.last_executed_query(self.cursor, sql, params), + 'duration': duration, + 'raw_sql': sql, + 'params': _params, + 'hash': sha_constructor(settings.SECRET_KEY + sql + _params).hexdigest(), + 'stacktrace': stacktrace, + 'start_time': start, + 'stop_time': stop, + 'is_slow': (duration > SQL_WARNING_THRESHOLD), + 'is_select': sql.lower().strip().startswith('select'), + 'template_info': template_info, + }) + + def executemany(self, sql, param_list): + return self.cursor.executemany(sql, param_list) + + def __getattr__(self, attr): + if attr in self.__dict__: + return self.__dict__[attr] + else: + return getattr(self.cursor, attr) + + def __iter__(self): + return iter(self.cursor)
\ No newline at end of file |