def _callable_name():
            # This is pretty ugly and inefficient, but a stack
            # frame doesn't provide any information about the
            # original callable object. We thus need to try and
            # deduce what it is by searching through the stack
            # frame globals. This will still not work in many
            # cases, including lambdas, generator expressions,
            # and decoratored attributes such as properties of
            # classes.

            try:
                if func_name in frame.f_globals:
                    if frame.f_globals[func_name].func_code is co:
                        return callable_name(frame.f_globals[func_name])

            except Exception:
                pass

            for name, obj in six.iteritems(frame.f_globals):
                try:
                    if obj.__dict__[func_name].func_code is co:
                        return callable_name(obj.__dict__[func_name])

                except Exception:
                    pass

def wrap_view_handler(wrapped, priority=3):

    # Ensure we don't wrap the view handler more than once. This
    # looks like it may occur in cases where the resolver is
    # called recursively. We flag that view handler was wrapped
    # using the '_nr_django_view_handler' attribute.

    if hasattr(wrapped, '_nr_django_view_handler'):
        return wrapped

    name = callable_name(wrapped)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        transaction.set_transaction_name(name, priority=priority)

        with FunctionTrace(transaction, name=name):
            try:
                return wrapped(*args, **kwargs)

            except:  # Catch all
                transaction.record_exception(ignore_errors=should_ignore)
                raise

    result = ObjectWrapper(wrapped, None, wrapper)
    result._nr_django_view_handler = True

    return result

    def wrapper(wrapped):
        # The middleware if a class method would already be
        # bound at this point, so is safe to determine the name
        # when it is being wrapped rather than on each
        # invocation.

        name = callable_name(wrapped)

        def wrapper(wrapped, instance, args, kwargs):
            transaction = current_transaction()

            if transaction is None:
                return wrapped(*args, **kwargs)

            before = (transaction.name, transaction.group)

            with FunctionTrace(transaction, name=name):
                try:
                    return wrapped(*args, **kwargs)

                finally:
                    # We want to name the transaction after this
                    # middleware but only if the transaction wasn't
                    # named from within the middleware itself explicity.

                    after = (transaction.name, transaction.group)
                    if before == after:
                        transaction.name_transaction(name, priority=2)

        return ObjectWrapper(wrapped, None, wrapper)

def wrap_handle_uncaught_exception(middleware):

    # Wrapper to be applied to handler called when exceptions
    # propagate up to top level from middleware. Records the
    # time spent in the handler as separate function node. Names
    # the web transaction after the name of the handler if not
    # already named at higher priority and capture further
    # errors in the handler.

    name = callable_name(middleware)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        def _wrapped(request, resolver, exc_info):
            transaction.name_transaction(name, priority=1)
            transaction.record_exception(*exc_info)

            try:
                return wrapped(request, resolver, exc_info)

            except:  # Catch all
                transaction.record_exception(*sys.exc_info())
                raise

        with FunctionTrace(transaction, name=name):
            return _wrapped(*args, **kwargs)

    return ObjectWrapper(middleware, None, wrapper)

    def __init__(self, consumer, source, name, settings, **properties):
        self.consumer = consumer

        self.properties = source(settings)

        self.factory = self.properties['factory']
        self.instance =  None

        self.properties.update(properties)

        self.name = (name or self.properties.get('name') or
                callable_name(source))

        self.group = self.properties.get('group')

        if self.group:
            self.group = self.group.rstrip('/')

        environ = {}

        environ['consumer.name'] = consumer
        environ['consumer.vendor'] = 'New Relic'
        environ['producer.name'] = self.name
        environ['producer.group'] = self.group

        self.environ = environ

        _logger.debug('Initialising data sampler for %r.', self.environ)

    def dynamic_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        if callable(name):
            if instance and inspect.ismethod(wrapped):
                _name = name(instance, *args, **kwargs)
            else:
                _name = name(*args, **kwargs)

        elif name is None:
            _name = callable_name(wrapped)

        else:
            _name = name

        if callable(group):
            if instance and inspect.ismethod(wrapped):
                _group = group(instance, *args, **kwargs)
            else:
                _group = group(*args, **kwargs)

        else:
            _group = group

        transaction.name_transaction(_name, _group, priority)

        return wrapped(*args, **kwargs)

    def on_connection_close_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction:
            return wrapped(*args, **kwargs)

        handler = instance
        request = handler.request

        transaction = getattr(request, '_nr_transaction', None)

        if not transaction:
            return wrapped(*args, **kwargs)

        transaction.save_transaction()

        if request._nr_wait_function_trace:
            request._nr_wait_function_trace.__exit__(None, None, None)

        name = callable_name(wrapped)

        try:
            with FunctionTrace(transaction, name):
                return wrapped(*args, **kwargs)

        except Exception:
            transaction.record_exception(*sys.exc_info())

        finally:
            transaction.__exit__(None, None, None)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if callable(name):
            # Start Hotfix v2.2.1.
            #if instance and inspect.ismethod(wrapped):
            #    _name = name(instance, *args, **kwargs)
            #else:
            #    _name = name(*args, **kwargs)

            if instance is not None:
                _name = name(instance, *args, **kwargs)
            else:
                _name = name(*args, **kwargs)
            # End Hotfix v2.2.1.

        elif name is None:
            _name = callable_name(wrapped)

        else:
            _name = name

        # Helper for obtaining the appropriate application object. If
        # has an activate() method assume it is a valid application
        # object. Don't check by type so se can easily mock it for
        # testing if need be.

        def _application():
            if hasattr(application, 'activate'):
                return application
            return application_instance(application)

        # Check to see if we are being called within the context of an
        # existing transaction. If we are, then we will record the call
        # as a function trace node instead. This situation can occur
        # when a function wrapped with Celery task decorator is called
        # explicitly in the context of an existing transaction.

        if transaction:
            with FunctionTrace(transaction, callable_name(wrapped)):
                return wrapped(*args, **kwargs)

        # Otherwise treat it as top level background task.

        with BackgroundTask(_application(), _name, 'Celery'):
            return wrapped(*args, **kwargs)

    def render_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        name = callable_name(wrapped)
        with FunctionTrace(transaction, name=name):
            return wrapped(*args, **kwargs)

def _name_transaction(*args, **kwargs):
    transaction = newrelic.api.transaction.current_transaction()
    if transaction:
        if isinstance(args[1], six.string_types):
            f = args[1]
        else:
            f = callable_name(args[1])
        transaction.name_transaction(f)
    return (args, kwargs)

        def callback_wrapper(wrapped, instance, args, kwargs):

            if current_transaction():
                return wrapped(*args, **kwargs)

            if not hasattr(transaction, '_nr_current_request'):
                return wrapped(*args, **kwargs)

            request = transaction._nr_current_request()

            if not request:
                return wrapped(*args, **kwargs)

            if not hasattr(request, '_nr_wait_function_trace'):
                return wrapped(*args, **kwargs)

            if not request._nr_wait_function_trace:
                return wrapped(*args, **kwargs)

            transaction.save_transaction()

            if request._nr_wait_function_trace:
                request._nr_wait_function_trace.__exit__(None, None, None)

            request._nr_wait_function_trace = None

            try:
                name = callable_name(wrapped)
                with FunctionTrace(transaction, name=name):
                    return wrapped(*args, **kwargs)

            except Exception:
                transaction.record_exception(*sys.exc_info())

                raise

            finally:
                if not request._nr_request_finished:
                    request._nr_wait_function_trace = FunctionTrace(
                            transaction, name='Callback/Wait',
                            group='Python/Tornado')

                    request._nr_wait_function_trace.__enter__()
                    transaction.drop_transaction()

                elif not request.connection.stream.writing():
                    transaction.__exit__(None, None, None)
                    request._nr_transaction = None

                else:
                    request._nr_wait_function_trace = FunctionTrace(
                            transaction, name='Request/Output',
                            group='Python/Tornado')

                    request._nr_wait_function_trace.__enter__()
                    transaction.drop_transaction()

    def literal_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        _name = name or callable_name(wrapped)

        with FunctionTrace(transaction, _name, group, label, params):
            return wrapped(*args, **kwargs)

    def literal_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        _name = name or callable_name(wrapped)

        transaction.name_transaction(_name, group, priority)

        return wrapped(*args, **kwargs)

def wrap_url_resolver(wrapped):

    # Wrap URL resolver. If resolver returns valid result then
    # wrap the view handler returned. The type of the result
    # changes across Django versions so need to check and adapt
    # as necessary. For a 404 then a user supplied 404 handler
    # or the default 404 handler should get later invoked and
    # transaction should be named after that.

    name = callable_name(wrapped)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        if hasattr(transaction, '_nr_django_url_resolver'):
            return wrapped(*args, **kwargs)

        # Tag the transaction so we know when we are in the top
        # level call to the URL resolver as don't want to show
        # the inner ones as would be one for each url pattern.

        transaction._nr_django_url_resolver = True

        def _wrapped(path):
            # XXX This can raise a Resolver404. If this is not dealt
            # with, is this the source of our unnamed 404 requests.

            with FunctionTrace(transaction, name=name, label=path):
                result = wrapped(path)

                if type(result) == type(()):
                    callback, callback_args, callback_kwargs = result
                    result = (wrap_view_handler(callback, priority=3),
                            callback_args, callback_kwargs)
                else:
                    result.func = wrap_view_handler(result.func, priority=3)

                return result

        try:
            return _wrapped(*args, **kwargs)

        finally:
            del transaction._nr_django_url_resolver

    return ObjectWrapper(wrapped, None, wrapper)

def wrap_template_block(wrapped):

    name = callable_name(wrapped)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        with FunctionTrace(transaction, name=instance.name,
                group='Template/Block'):
            return wrapped(*args, **kwargs)

    return ObjectWrapper(wrapped, None, wrapper)

    def dynamic_wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        if callable(name):
            if instance and inspect.ismethod(wrapped):
                _name = name(instance, *args, **kwargs)
            else:
                _name = name(*args, **kwargs)

        elif name is None:
            _name = callable_name(wrapped)

        else:
            _name = name

        if callable(group):
            if instance and inspect.ismethod(wrapped):
                _group = group(instance, *args, **kwargs)
            else:
                _group = group(*args, **kwargs)

        else:
            _group = group

        if callable(label):
            if instance and inspect.ismethod(wrapped):
                _label = label(instance, *args, **kwargs)
            else:
                _label = label(*args, **kwargs)

        else:
            _label = label

        if callable(params):
            if instance and inspect.ismethod(wrapped):
                _params = params(instance, *args, **kwargs)
            else:
                _params = params(*args, **kwargs)

        else:
            _params = params

        with FunctionTrace(transaction, _name, _group, _label, _params):
            return wrapped(*args, **kwargs)

def wrap_url_resolver_nnn(wrapped, priority=1):

    # Wrapper to be applied to the URL resolver for errors.

    name = callable_name(wrapped)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        with FunctionTrace(transaction, name=name):
            callback, param_dict = wrapped(*args, **kwargs)
            return (wrap_view_handler(callback, priority=priority),
                    param_dict)

    return ObjectWrapper(wrapped, None, wrapper)

def outer_fn_wrapper(outer_fn, instance, args, kwargs):
    view_name = args[0]

    meta = getattr(instance, "_meta", None)

    if meta is None:
        group = 'Python/TastyPie/Api'
        name = instance.api_name
        callback = getattr(instance, 'top_level', None)
    elif meta.api_name is not None:
        group = 'Python/TastyPie/Api'
        name = '%s/%s/%s' % (meta.api_name, meta.resource_name, view_name)
        callback = getattr(instance, view_name, None)
    else:
        group = 'Python/TastyPie/Resource'
        name = '%s/%s' % (meta.resource_name, view_name)
        callback = getattr(instance, view_name, None)

    # Give preference to naming web transaction and trace node after
    # target callback, but fall back to abstract path if for some reason
    # we don't get a valid target callback.

    if callback is not None:
        name = callable_name(callback)
        group = None

    def inner_fn_wrapper(inner_fn, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None or name is None:
            return inner_fn(*args, **kwargs)

        transaction.name_transaction(name, group, priority=4)

        with FunctionTrace(transaction, name, group):
            try:
                return inner_fn(*args, **kwargs)
            except:  # Catch all
                transaction.record_exception(*sys.exc_info())
                raise

    result = outer_fn(*args, **kwargs)

    return ObjectWrapper(result, None, inner_fn_wrapper)

def wrap_view_handler(wrapped, priority=3):

    # Ensure we don't wrap the view handler more than once. This
    # looks like it may occur in cases where the resolver is
    # called recursively. We flag that view handler was wrapped
    # using the '_nr_django_view_handler' attribute.

    if hasattr(wrapped, '_nr_django_view_handler'):
        return wrapped

    name = callable_name(wrapped)

    def wrapper(wrapped, instance, args, kwargs):
        transaction = current_transaction()

        if transaction is None:
            return wrapped(*args, **kwargs)

        transaction.name_transaction(name, priority=priority)

        with FunctionTrace(transaction, name=name):
            try:
                return wrapped(*args, **kwargs)

            except:  # Catch all
                # Python 2.5 doesn't allow *args before keywords.
                # See http://bugs.python.org/issue3473.
                exc_info = sys.exc_info()
                transaction.record_exception(exc_info[0], exc_info[1],
                        exc_info[2], ignore_errors=['django.http:Http404',
                        'django.http.response:Http404'])
                raise

            finally:
                exc_info = None

    result = ObjectWrapper(wrapped, None, wrapper)
    result._nr_django_view_handler = True

    return result

    def wrapper(wrapped):
        # The middleware if a class method would already be
        # bound at this point, so is safe to determine the name
        # when it is being wrapped rather than on each
        # invocation.

        name = callable_name(wrapped)

        def wrapper(wrapped, instance, args, kwargs):
            transaction = current_transaction()

            def _wrapped(request, view_func, view_args, view_kwargs):
                # This strips the view handler wrapper before call.

                if hasattr(view_func, '_nr_last_object'):
                    view_func = view_func._nr_last_object

                return wrapped(request, view_func, view_args, view_kwargs)

            if transaction is None:
                return _wrapped(*args, **kwargs)

            before = (transaction.name, transaction.group)

            with FunctionTrace(transaction, name=name):
                try:
                    return _wrapped(*args, **kwargs)

                finally:
                    # We want to name the transaction after this
                    # middleware but only if the transaction wasn't
                    # named from within the middleware itself explicity.

                    after = (transaction.name, transaction.group)
                    if before == after:
                        transaction.set_transaction_name(name, priority=2)

        return ObjectWrapper(wrapped, None, wrapper)