103 lines
2.6 KiB
Python
103 lines
2.6 KiB
Python
"""
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Command-line utility to start a stub service.
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"""
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import sys
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import time
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import logging
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from .comments import StubCommentsService
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from .xqueue import StubXQueueService
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from .youtube import StubYouTubeService
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from .ora import StubOraService
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from .lti import StubLtiService
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USAGE = "USAGE: python -m stubs.start SERVICE_NAME PORT_NUM [CONFIG_KEY=CONFIG_VAL, ...]"
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SERVICES = {
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'xqueue': StubXQueueService,
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'youtube': StubYouTubeService,
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'ora': StubOraService,
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'comments': StubCommentsService,
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'lti': StubLtiService,
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}
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# Log to stdout, including debug messages
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logging.basicConfig(level=logging.DEBUG, format="%(levelname)s %(message)s")
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def get_args():
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"""
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Parse arguments, returning tuple of `(service_name, port_num, config_dict)`.
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Exits with a message if arguments are invalid.
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"""
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if len(sys.argv) < 3:
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print USAGE
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sys.exit(1)
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service_name = sys.argv[1]
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port_num = sys.argv[2]
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config_dict = _parse_config_args(sys.argv[3:])
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if service_name not in SERVICES:
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print "Unrecognized service '{0}'. Valid choices are: {1}".format(
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service_name, ", ".join(SERVICES.keys()))
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sys.exit(1)
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try:
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port_num = int(port_num)
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if port_num < 0:
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raise ValueError
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except ValueError:
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print "Port '{0}' must be a positive integer".format(port_num)
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sys.exit(1)
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return service_name, port_num, config_dict
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def _parse_config_args(args):
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"""
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Parse stub configuration arguments, which are strings of the form "KEY=VAL".
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`args` is a list of arguments from the command line.
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Any argument that does not match the "KEY=VAL" format will be logged and skipped.
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Returns a dictionary with the configuration keys and values.
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"""
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config_dict = dict()
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for config_str in args:
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try:
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components = config_str.split('=')
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if len(components) >= 2:
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config_dict[components[0]] = "=".join(components[1:])
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except:
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print "Warning: could not interpret config value '{0}'".format(config_str)
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pass
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return config_dict
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def main():
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"""
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Start a server; shut down on keyboard interrupt signal.
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"""
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service_name, port_num, config_dict = get_args()
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print "Starting stub service '{0}' on port {1}...".format(service_name, port_num)
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server = SERVICES[service_name](port_num=port_num)
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server.config.update(config_dict)
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try:
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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print "Stopping stub service..."
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finally:
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server.shutdown()
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if __name__ == "__main__":
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main()
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