This document is for Kombu's development version, which can be significantly different from previous releases. Get the stable docs here: 5.0.

Source code for kombu.utils.debug

"""Debugging support."""

import logging

from vine.utils import wraps

from kombu.log import get_logger

__all__ = ('setup_logging', 'Logwrapped')


def setup_logging(loglevel=logging.DEBUG, loggers=None):
    """Setup logging to stdout."""
    loggers = ['kombu.connection', 'kombu.channel'] if not loggers else loggers
    for logger_name in loggers:
        logger = get_logger(logger_name)
        logger.addHandler(logging.StreamHandler())
        logger.setLevel(loglevel)


class Logwrapped:
    """Wrap all object methods, to log on call."""

    __ignore = ('__enter__', '__exit__')

    def __init__(self, instance, logger=None, ident=None):
        self.instance = instance
        self.logger = get_logger(logger)
        self.ident = ident

    def __getattr__(self, key):
        meth = getattr(self.instance, key)

        if not callable(meth) or key in self.__ignore:
            return meth

        @wraps(meth)
        def __wrapped(*args, **kwargs):
            info = ''
            if self.ident:
                info += self.ident.format(self.instance)
            info += f'{meth.__name__}('
            if args:
                info += ', '.join(map(repr, args))
            if kwargs:
                if args:
                    info += ', '
                info += ', '.join(f'{key}={value!r}'
                                  for key, value in kwargs.items())
            info += ')'
            self.logger.debug(info)
            return meth(*args, **kwargs)

        return __wrapped

    def __repr__(self):
        return repr(self.instance)

    def __dir__(self):
        return dir(self.instance)