#!/usr/bin/env python """A simple engine that talks to a controller over 0MQ. it handles registration, etc. and launches a kernel connected to the Controller's Schedulers. Authors: * Min RK """ #----------------------------------------------------------------------------- # Copyright (C) 2010-2011 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. #----------------------------------------------------------------------------- from __future__ import print_function import sys import time import zmq from zmq.eventloop import ioloop, zmqstream # internal from IPython.utils.traitlets import Instance, Dict, Int, Type, CFloat, Unicode # from IPython.utils.localinterfaces import LOCALHOST from IPython.parallel.controller.heartmonitor import Heart from IPython.parallel.factory import RegistrationFactory from IPython.parallel.util import disambiguate_url from IPython.zmq.session import Message from .streamkernel import Kernel class EngineFactory(RegistrationFactory): """IPython engine""" # configurables: out_stream_factory=Type('IPython.zmq.iostream.OutStream', config=True, help="""The OutStream for handling stdout/err. Typically 'IPython.zmq.iostream.OutStream'""") display_hook_factory=Type('IPython.zmq.displayhook.DisplayHook', config=True, help="""The class for handling displayhook. Typically 'IPython.zmq.displayhook.DisplayHook'""") location=Unicode(config=True, help="""The location (an IP address) of the controller. This is used for disambiguating URLs, to determine whether loopback should be used to connect or the public address.""") timeout=CFloat(2,config=True, help="""The time (in seconds) to wait for the Controller to respond to registration requests before giving up.""") # not configurable: user_ns=Dict() id=Int(allow_none=True) registrar=Instance('zmq.eventloop.zmqstream.ZMQStream') kernel=Instance(Kernel) def __init__(self, **kwargs): super(EngineFactory, self).__init__(**kwargs) self.ident = self.session.session ctx = self.context reg = ctx.socket(zmq.XREQ) reg.setsockopt(zmq.IDENTITY, self.ident) reg.connect(self.url) self.registrar = zmqstream.ZMQStream(reg, self.loop) def register(self): """send the registration_request""" self.log.info("registering") content = dict(queue=self.ident, heartbeat=self.ident, control=self.ident) self.registrar.on_recv(self.complete_registration) # print (self.session.key) self.session.send(self.registrar, "registration_request",content=content) def complete_registration(self, msg): # print msg self._abort_dc.stop() ctx = self.context loop = self.loop identity = self.ident idents,msg = self.session.feed_identities(msg) msg = Message(self.session.unpack_message(msg)) if msg.content.status == 'ok': self.id = int(msg.content.id) # create Shell Streams (MUX, Task, etc.): queue_addr = msg.content.mux shell_addrs = [ str(queue_addr) ] task_addr = msg.content.task if task_addr: shell_addrs.append(str(task_addr)) # Uncomment this to go back to two-socket model # shell_streams = [] # for addr in shell_addrs: # stream = zmqstream.ZMQStream(ctx.socket(zmq.XREP), loop) # stream.setsockopt(zmq.IDENTITY, identity) # stream.connect(disambiguate_url(addr, self.location)) # shell_streams.append(stream) # Now use only one shell stream for mux and tasks stream = zmqstream.ZMQStream(ctx.socket(zmq.XREP), loop) stream.setsockopt(zmq.IDENTITY, identity) shell_streams = [stream] for addr in shell_addrs: stream.connect(disambiguate_url(addr, self.location)) # end single stream-socket # control stream: control_addr = str(msg.content.control) control_stream = zmqstream.ZMQStream(ctx.socket(zmq.XREP), loop) control_stream.setsockopt(zmq.IDENTITY, identity) control_stream.connect(disambiguate_url(control_addr, self.location)) # create iopub stream: iopub_addr = msg.content.iopub iopub_stream = zmqstream.ZMQStream(ctx.socket(zmq.PUB), loop) iopub_stream.setsockopt(zmq.IDENTITY, identity) iopub_stream.connect(disambiguate_url(iopub_addr, self.location)) # launch heartbeat hb_addrs = msg.content.heartbeat # print (hb_addrs) # # Redirect input streams and set a display hook. if self.out_stream_factory: sys.stdout = self.out_stream_factory(self.session, iopub_stream, u'stdout') sys.stdout.topic = 'engine.%i.stdout'%self.id sys.stderr = self.out_stream_factory(self.session, iopub_stream, u'stderr') sys.stderr.topic = 'engine.%i.stderr'%self.id if self.display_hook_factory: sys.displayhook = self.display_hook_factory(self.session, iopub_stream) sys.displayhook.topic = 'engine.%i.pyout'%self.id self.kernel = Kernel(config=self.config, int_id=self.id, ident=self.ident, session=self.session, control_stream=control_stream, shell_streams=shell_streams, iopub_stream=iopub_stream, loop=loop, user_ns = self.user_ns, log=self.log) self.kernel.start() hb_addrs = [ disambiguate_url(addr, self.location) for addr in hb_addrs ] heart = Heart(*map(str, hb_addrs), heart_id=identity) heart.start() else: self.log.fatal("Registration Failed: %s"%msg) raise Exception("Registration Failed: %s"%msg) self.log.info("Completed registration with id %i"%self.id) def abort(self): self.log.fatal("Registration timed out after %.1f seconds"%self.timeout) self.session.send(self.registrar, "unregistration_request", content=dict(id=self.id)) time.sleep(1) sys.exit(255) def start(self): dc = ioloop.DelayedCallback(self.register, 0, self.loop) dc.start() self._abort_dc = ioloop.DelayedCallback(self.abort, self.timeout*1000, self.loop) self._abort_dc.start()