|
|
"""The client and server for a basic ping-pong style heartbeat.
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import socket
|
|
|
import sys
|
|
|
from threading import Thread
|
|
|
|
|
|
import zmq
|
|
|
|
|
|
from IPython.utils.localinterfaces import LOCALHOST
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Code
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class Heartbeat(Thread):
|
|
|
"A simple ping-pong style heartbeat that runs in a thread."
|
|
|
|
|
|
def __init__(self, context, addr=(LOCALHOST, 0)):
|
|
|
Thread.__init__(self)
|
|
|
self.context = context
|
|
|
self.ip, self.port = addr
|
|
|
if self.port == 0:
|
|
|
s = socket.socket()
|
|
|
# '*' means all interfaces to 0MQ, which is '' to socket.socket
|
|
|
s.bind(('' if self.ip == '*' else self.ip, 0))
|
|
|
self.port = s.getsockname()[1]
|
|
|
s.close()
|
|
|
self.addr = (self.ip, self.port)
|
|
|
self.daemon = True
|
|
|
|
|
|
def run(self):
|
|
|
self.socket = self.context.socket(zmq.REP)
|
|
|
self.socket.bind('tcp://%s:%i' % self.addr)
|
|
|
zmq.device(zmq.FORWARDER, self.socket, self.socket)
|
|
|
|
|
|
|
