# -*- coding: utf-8 -*-
from oslo_config import cfg
from oslo_context import context
from oslo_log import log as logging

LOG = logging.getLogger(__name__)
CONF = cfg.CONF
DOMAIN = 'demo'
#在上述miniservice中，在REST的入口处，通过
#context.RequestContext()
#即生成了这样的request_id，之后每次log都会自动带上它。
def prepare():
    #将配置文件中的信息注册到logging
    logging.register_options(CONF)
    #修改配置cfg文件的默认值，如'routes=INFO'
    extra_log_level_defaults = [
        'dogpile=INFO',
        'routes=INFO'
        ]

    logging.set_defaults(
        default_log_levels=logging.get_default_log_levels() +
        extra_log_level_defaults)
    # Required setup based on configuration and domain
    logging.setup(CONF, DOMAIN)

if __name__ == '__main__':
    prepare()
    LOG.info("Welcome to Oslo Logging")
    LOG.error("Without context")
    context.RequestContext(user='ddd',
                           tenant='dddd',
                           domain='a6b9dddd360e')
    LOG.info("With context")