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64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
"""
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A random assortment of utility functions useful on masters and slaves.
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"""
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import logging
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import sys
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import econtext
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import econtext.core
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import econtext.master
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LOG = logging.getLogger('econtext')
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def log_to_file(path=None, io=True, level=logging.DEBUG):
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"""Install a new :py:class:`logging.Handler` writing applications logs to
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the filesystem. Useful when debugging slave IO problems."""
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log = logging.getLogger('')
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if path:
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fp = open(path, 'w', 1)
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econtext.core.set_cloexec(fp.fileno())
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else:
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fp = sys.stderr
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log.setLevel(level)
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if io:
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logging.getLogger('econtext.io').setLevel(level)
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fmt = '%(asctime)s %(levelname).1s %(name)s: %(message)s'
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datefmt = '%H:%M:%S'
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handler = logging.StreamHandler(fp)
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handler.formatter = logging.Formatter(fmt, datefmt)
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log.handlers.insert(0, handler)
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def run_with_broker(func, *args, **kwargs):
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"""Arrange for `func(broker, *args, **kwargs)` to run with a temporary
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:py:class:`econtext.master.Broker`, ensuring the broker is correctly
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shut down during normal or exceptional return."""
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broker = econtext.master.Broker()
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try:
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return func(broker, *args, **kwargs)
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finally:
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broker.shutdown()
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broker.join()
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def with_broker(func):
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"""Decorator version of :py:func:`run_with_broker`. Example:
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.. code-block:: python
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@with_broker
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def do_stuff(broker, arg):
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pass
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do_stuff(blah, 123)
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"""
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def wrapper(*args, **kwargs):
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return run_with_broker(*args, **kwargs)
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wrapper.func_name = func.func_name
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return wrapper
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