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DEV: Allow a list of log handlers.

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This commit is contained in:
Scott Sanderson
2015-02-23 09:51:28 -05:00
parent 17e4f2f2d1
commit 2a39fbe00a
1 changed files with 15 additions and 20 deletions
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35
jupyterhub/app.py
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@@ -369,37 +369,32 @@ class JupyterHub(Application):
extra_log_file = Unicode( extra_log_file = Unicode(
"", "",
config=True, config=True,
help="""Set a FileHandler on this file. help="Set a logging.FileHandler on this file."
Ignored if extra_log_handler is explicitly set in config file.
"""
) )
extra_log_handler = Instance( extra_log_handlers = List(
klass=logging.Handler, Instance(logging.Handler),
allow_none=True,
config=True, config=True,
help="Extra handler to set on JupyterHub logger.", help="Extra log handlers to set on JupyterHub logger",
) )
def _extra_log_handler_default(self):
if self.extra_log_file:
return logging.FileHandler(self.extra_log_file)
return None
def init_logging(self): def init_logging(self):
# This prevents double log messages because tornado use a root logger that # This prevents double log messages because tornado use a root logger that
# self.log is a child of. The logging module dipatches log messages to a log # self.log is a child of. The logging module dipatches log messages to a log
# and all of its ancenstors until propagate is set to False. # and all of its ancenstors until propagate is set to False.
self.log.propagate = False self.log.propagate = False
if self.extra_log_handler: if self.extra_log_file:
self.extra_log_handler.setFormatter( self.extra_log_handlers.append(
self._log_formatter_cls( logging.FileHandler(self.extra_log_file)
fmt=self.log_format,
datefmt=self.log_datefmt,
),
) )
self.log.addHandler(self.extra_log_handler)
_formatter = self._log_formatter_cls(
fmt=self.log_format,
datefmt=self.log_datefmt,
)
for handler in self.extra_log_handlers:
handler.setFormatter(_formatter)
self.log.addHandler(handler)
# hook up tornado 3's loggers to our app handlers # hook up tornado 3's loggers to our app handlers
for log in (app_log, access_log, gen_log): for log in (app_log, access_log, gen_log):