91 lines
3.0 KiB
Python
91 lines
3.0 KiB
Python
"""shutdown function"""
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import os
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import queue as Queue
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import threading
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import time
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import shared
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import state
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from debug import logger
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from helper_sql import sqlQuery, sqlStoredProcedure
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from inventory import Inventory
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from knownnodes import saveKnownNodes
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from network import StoppableThread
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from queues import (
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addressGeneratorQueue, objectProcessorQueue, UISignalQueue, workerQueue)
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def doCleanShutdown():
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"""
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Used to tell all the treads to finish work and exit.
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"""
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state.shutdown = 1
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objectProcessorQueue.put(('checkShutdownVariable', 'no data'))
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for thread in threading.enumerate():
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if thread.isAlive() and isinstance(thread, StoppableThread):
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thread.stopThread()
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UISignalQueue.put((
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'updateStatusBar',
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'Saving the knownNodes list of peers to disk...'))
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logger.info('Saving knownNodes list of peers to disk')
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saveKnownNodes()
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logger.info('Done saving knownNodes list of peers to disk')
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UISignalQueue.put((
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'updateStatusBar',
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'Done saving the knownNodes list of peers to disk.'))
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logger.info('Flushing inventory in memory out to disk...')
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UISignalQueue.put((
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'updateStatusBar',
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'Flushing inventory in memory out to disk.'
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' This should normally only take a second...'))
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Inventory().flush()
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# Verify that the objectProcessor has finished exiting. It should have
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# incremented the shutdown variable from 1 to 2. This must finish before
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# we command the sqlThread to exit.
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while state.shutdown == 1:
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time.sleep(.1)
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# Wait long enough to guarantee that any running proof of work worker
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# threads will check the shutdown variable and exit. If the main thread
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# closes before they do then they won't stop.
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time.sleep(.25)
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for thread in threading.enumerate():
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if (
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thread is not threading.currentThread()
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and isinstance(thread, StoppableThread)
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and thread.name != 'SQL'
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):
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logger.debug("Waiting for thread %s", thread.name)
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thread.join()
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# This one last useless query will guarantee that the previous flush
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# committed and that the
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# objectProcessorThread committed before we close the program.
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sqlQuery('SELECT address FROM subscriptions')
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logger.info('Finished flushing inventory.')
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sqlStoredProcedure('exit')
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# flush queues
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for queue in (
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workerQueue, UISignalQueue, addressGeneratorQueue,
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objectProcessorQueue):
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while True:
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try:
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queue.get(False)
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queue.task_done()
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except Queue.Empty:
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break
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if shared.thisapp.daemon or not state.enableGUI: # ..fixme:: redundant?
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logger.info('Clean shutdown complete.')
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shared.thisapp.cleanup()
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os._exit(0) # pylint: disable=protected-access
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else:
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logger.info('Core shutdown complete.')
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for thread in threading.enumerate():
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logger.debug('Thread %s still running', thread.name)
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