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aae1b70a83
mp_benchmarks, mp_newtypes and mp_distribution are still broken but the others are working properly. We should include the examples in our unit test suite ...
67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
#
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# Example where a pool of http servers share a single listening socket
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#
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# On Windows this module depends on the ability to pickle a socket
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# object so that the worker processes can inherit a copy of the server
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# object. (We import `multiprocessing.reduction` to enable this pickling.)
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#
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# Not sure if we should synchronize access to `socket.accept()` method by
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# using a process-shared lock -- does not seem to be necessary.
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#
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import os
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import sys
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from multiprocessing import Process, current_process, freeze_support
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from http.server import HTTPServer
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from http.server import SimpleHTTPRequestHandler
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if sys.platform == 'win32':
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import multiprocessing.reduction # make sockets pickable/inheritable
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def note(format, *args):
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sys.stderr.write('[%s]\t%s\n' % (current_process().name, format%args))
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class RequestHandler(SimpleHTTPRequestHandler):
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# we override log_message() to show which process is handling the request
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def log_message(self, format, *args):
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note(format, *args)
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def serve_forever(server):
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note('starting server')
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try:
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server.serve_forever()
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except KeyboardInterrupt:
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pass
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def runpool(address, number_of_processes):
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# create a single server object -- children will each inherit a copy
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server = HTTPServer(address, RequestHandler)
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# create child processes to act as workers
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for i in range(number_of_processes-1):
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Process(target=serve_forever, args=(server,)).start()
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# main process also acts as a worker
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serve_forever(server)
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def test():
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DIR = os.path.join(os.path.dirname(__file__), '..')
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ADDRESS = ('localhost', 8000)
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NUMBER_OF_PROCESSES = 4
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print('Serving at http://%s:%d using %d worker processes' % \
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(ADDRESS[0], ADDRESS[1], NUMBER_OF_PROCESSES))
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print('To exit press Ctrl-' + ['C', 'Break'][sys.platform=='win32'])
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os.chdir(DIR)
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runpool(ADDRESS, NUMBER_OF_PROCESSES)
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if __name__ == '__main__':
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freeze_support()
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test()
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