63 lines
1.4 KiB
Python
63 lines
1.4 KiB
Python
"""Module to provider util functions in all compass code
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.. moduleauthor:: Xiaodong Wang <xiaodongwang@huawei.com>
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"""
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import daemon
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import logging
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import sys
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import signal
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import time
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from compass.utils import flags
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flags.add_bool('daemonize',
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help='run as daemon',
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default=False)
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BUSY = False
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KILLED = False
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def handle_term(signum, frame):
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"""Handle sig term."""
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global KILLED
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logging.info('Caught signal %s in %s', signum, frame)
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KILLED = True
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if not BUSY:
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sys.exit(0)
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def _daemon(callback, run_interval):
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"""help function to run callback in daemon"""
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global BUSY
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signal.signal(signal.SIGTERM, handle_term)
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signal.signal(signal.SIGHUP, handle_term)
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while True:
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BUSY = True
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callback()
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BUSY = False
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if KILLED:
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logging.info('exit loop')
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break
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if run_interval > 0:
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logging.info('will rerun after %s seconds',
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flags.OPTIONS.run_interval)
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time.sleep(flags.OPTIONS.run_interval)
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else:
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logging.info('finish loop')
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break
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def daemonize(callback, run_interval, **kwargs):
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"""daemonize callback and run every run_interval seconds."""
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if flags.OPTIONS.daemonize:
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with daemon.DaemonContext(**kwargs):
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logging.info('run as daemon')
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_daemon(callback, run_interval)
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else:
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_daemon(callback, run_interval)
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