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""" Defines helper functions for creating kernel entry points and process
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launchers.
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"""
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# Standard library imports.
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import logging
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import atexit
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import os
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import socket
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from subprocess import Popen, PIPE
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import sys
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# System library imports.
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import zmq
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from zmq.log import handlers
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# Local imports.
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from IPython.core.ultratb import FormattedTB
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from IPython.external.argparse import ArgumentParser
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from IPython.zmq.log import logger
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def split_ports(s, n):
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"""Parser helper for multiport strings"""
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if not s:
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return tuple([0]*n)
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ports = map(int, s.split(','))
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if len(ports) != n:
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raise ValueError
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return ports
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def select_random_ports(n):
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"""Selects and return n random ports that are open."""
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ports = []
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for i in xrange(n):
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sock = socket.socket()
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sock.bind(('', 0))
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ports.append(sock)
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for i, sock in enumerate(ports):
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port = sock.getsockname()[1]
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sock.close()
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ports[i] = port
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return ports
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def make_argument_parser():
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""" Creates an ArgumentParser for the generic arguments supported by all
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ipcluster entry points.
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"""
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parser = ArgumentParser()
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parser.add_argument('--ip', type=str, default='127.0.0.1',
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help='set the controller\'s IP address [default: local]')
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parser.add_argument('--transport', type=str, default='tcp',
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help='set the transport to use [default: tcp]')
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parser.add_argument('--regport', type=int, metavar='PORT', default=10101,
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help='set the XREP port for registration [default: 10101]')
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parser.add_argument('--logport', type=int, metavar='PORT', default=20202,
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help='set the PUB port for logging [default: 10201]')
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parser.add_argument('--loglevel', type=int, metavar='LEVEL', default=logging.DEBUG,
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help='set the log level [default: DEBUG]')
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parser.add_argument('--ident', type=str,
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help='set the ZMQ identity [default: random]')
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parser.add_argument('--url', type=str,
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help='set transport,ip,regport in one arg, e.g. tcp://127.0.0.1:10101')
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return parser
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def connect_logger(context, iface, root="ip", loglevel=logging.DEBUG):
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lsock = context.socket(zmq.PUB)
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lsock.connect(iface)
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handler = handlers.PUBHandler(lsock)
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handler.setLevel(loglevel)
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handler.root_topic = root
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logger.addHandler(handler)
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