def register_handlers(client):
    from django.core.signals import got_request_exception, request_started, request_finished
    from elasticapm.contrib.django.handlers import exception_handler

    # Connect to Django's internal signal handlers
    got_request_exception.disconnect(dispatch_uid=ERROR_DISPATCH_UID)
    got_request_exception.connect(partial(exception_handler, client), dispatch_uid=ERROR_DISPATCH_UID, weak=False)

    request_started.disconnect(dispatch_uid=REQUEST_START_DISPATCH_UID)
    request_started.connect(
        partial(_request_started_handler, client), dispatch_uid=REQUEST_START_DISPATCH_UID, weak=False
    )

    request_finished.disconnect(dispatch_uid=REQUEST_FINISH_DISPATCH_UID)
    request_finished.connect(
        lambda sender, **kwargs: client.end_transaction() if _should_start_transaction(client) else None,
        dispatch_uid=REQUEST_FINISH_DISPATCH_UID,
        weak=False,
    )

    # If we can import celery, register ourselves as exception handler
    try:
        import celery  # noqa F401
        from elasticapm.contrib.celery import register_exception_tracking

        try:
            register_exception_tracking(client)
        except Exception as e:
            client.logger.exception("Failed installing django-celery hook: %s" % e)
    except ImportError:
        client.logger.debug("Not instrumenting Celery, couldn't import") 

def tearDown(self):
        request_started.connect(close_old_connections) 

def setUp(self):
        self.signals = []
        self.signaled_environ = None
        request_started.connect(self.register_started)
        request_finished.connect(self.register_finished) 

def tearDown(self):
        request_finished.connect(close_old_connections) 

def tearDown(self):
        request_started.connect(close_old_connections) 

def setUp(self):
        self.signals = []
        self.signaled_environ = None
        request_started.connect(self.register_started)
        request_finished.connect(self.register_finished) 

def inotify_code_changed():
    """
    Checks for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code 

def inotify_code_changed():
    """
    Check for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code 

def inotify_code_changed():
    """
    Check for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code 

def inotify_code_changed():
    """
    Checks for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code 

def inotify_code_changed():
    """
    Checks for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code 

def inotify_code_changed():
    """
    Checks for changed code using inotify. After being called
    it blocks until a change event has been fired.
    """
    class EventHandler(pyinotify.ProcessEvent):
        modified_code = None

        def process_default(self, event):
            if event.path.endswith('.mo'):
                EventHandler.modified_code = I18N_MODIFIED
            else:
                EventHandler.modified_code = FILE_MODIFIED

    wm = pyinotify.WatchManager()
    notifier = pyinotify.Notifier(wm, EventHandler())

    def update_watch(sender=None, **kwargs):
        if sender and getattr(sender, 'handles_files', False):
            # No need to update watches when request serves files.
            # (sender is supposed to be a django.core.handlers.BaseHandler subclass)
            return
        mask = (
            pyinotify.IN_MODIFY |
            pyinotify.IN_DELETE |
            pyinotify.IN_ATTRIB |
            pyinotify.IN_MOVED_FROM |
            pyinotify.IN_MOVED_TO |
            pyinotify.IN_CREATE |
            pyinotify.IN_DELETE_SELF |
            pyinotify.IN_MOVE_SELF
        )
        for path in gen_filenames(only_new=True):
            wm.add_watch(path, mask)

    # New modules may get imported when a request is processed.
    request_finished.connect(update_watch)

    # Block until an event happens.
    update_watch()
    notifier.check_events(timeout=None)
    notifier.read_events()
    notifier.process_events()
    notifier.stop()

    # If we are here the code must have changed.
    return EventHandler.modified_code