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#!/usr/bin/env python
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"""The IPython Controller Hub with 0MQ
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This is the master object that handles connections from engines and clients,
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and monitors traffic through the various queues.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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import sys
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import time
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from datetime import datetime
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import zmq
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from zmq.eventloop import ioloop
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from zmq.eventloop.zmqstream import ZMQStream
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# internal:
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from IPython.utils.importstring import import_item
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from IPython.utils.traitlets import HasTraits, Instance, Int, CStr, Str, Dict, Set, List, Bool
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from .entry_point import select_random_ports
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from .factory import RegistrationFactory, LoggingFactory
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from . import error
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from .heartmonitor import HeartMonitor
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from .util import validate_url_container, ISO8601
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#-----------------------------------------------------------------------------
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# Code
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#-----------------------------------------------------------------------------
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def _passer(*args, **kwargs):
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return
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def _printer(*args, **kwargs):
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print (args)
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print (kwargs)
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def init_record(msg):
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"""Initialize a TaskRecord based on a request."""
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header = msg['header']
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return {
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'msg_id' : header['msg_id'],
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'header' : header,
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'content': msg['content'],
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'buffers': msg['buffers'],
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'submitted': datetime.strptime(header['date'], ISO8601),
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'client_uuid' : None,
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'engine_uuid' : None,
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'started': None,
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'completed': None,
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'resubmitted': None,
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'result_header' : None,
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'result_content' : None,
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'result_buffers' : None,
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'queue' : None,
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'pyin' : None,
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'pyout': None,
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'pyerr': None,
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'stdout': '',
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'stderr': '',
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}
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class EngineConnector(HasTraits):
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"""A simple object for accessing the various zmq connections of an object.
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Attributes are:
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id (int): engine ID
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uuid (str): uuid (unused?)
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queue (str): identity of queue's XREQ socket
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registration (str): identity of registration XREQ socket
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heartbeat (str): identity of heartbeat XREQ socket
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"""
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id=Int(0)
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queue=Str()
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control=Str()
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registration=Str()
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heartbeat=Str()
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pending=Set()
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class HubFactory(RegistrationFactory):
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"""The Configurable for setting up a Hub."""
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# name of a scheduler scheme
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scheme = Str('leastload', config=True)
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# port-pairs for monitoredqueues:
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hb = Instance(list, config=True)
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def _hb_default(self):
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return select_random_ports(2)
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mux = Instance(list, config=True)
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def _mux_default(self):
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return select_random_ports(2)
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task = Instance(list, config=True)
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def _task_default(self):
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return select_random_ports(2)
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control = Instance(list, config=True)
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def _control_default(self):
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return select_random_ports(2)
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iopub = Instance(list, config=True)
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def _iopub_default(self):
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return select_random_ports(2)
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# single ports:
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mon_port = Instance(int, config=True)
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def _mon_port_default(self):
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return select_random_ports(1)[0]
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notifier_port = Instance(int, config=True)
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def _notifier_port_default(self):
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return select_random_ports(1)[0]
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ping = Int(1000, config=True) # ping frequency
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engine_ip = CStr('127.0.0.1', config=True)
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engine_transport = CStr('tcp', config=True)
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client_ip = CStr('127.0.0.1', config=True)
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client_transport = CStr('tcp', config=True)
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monitor_ip = CStr('127.0.0.1', config=True)
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monitor_transport = CStr('tcp', config=True)
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monitor_url = CStr('')
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db_class = CStr('IPython.zmq.parallel.dictdb.DictDB', config=True)
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# not configurable
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db = Instance('IPython.zmq.parallel.dictdb.BaseDB')
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heartmonitor = Instance('IPython.zmq.parallel.heartmonitor.HeartMonitor')
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subconstructors = List()
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_constructed = Bool(False)
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def _ip_changed(self, name, old, new):
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self.engine_ip = new
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self.client_ip = new
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self.monitor_ip = new
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self._update_monitor_url()
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def _update_monitor_url(self):
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self.monitor_url = "%s://%s:%i"%(self.monitor_transport, self.monitor_ip, self.mon_port)
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def _transport_changed(self, name, old, new):
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self.engine_transport = new
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self.client_transport = new
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self.monitor_transport = new
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self._update_monitor_url()
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def __init__(self, **kwargs):
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super(HubFactory, self).__init__(**kwargs)
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self._update_monitor_url()
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# self.on_trait_change(self._sync_ips, 'ip')
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# self.on_trait_change(self._sync_transports, 'transport')
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self.subconstructors.append(self.construct_hub)
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def construct(self):
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assert not self._constructed, "already constructed!"
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for subc in self.subconstructors:
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subc()
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self._constructed = True
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def start(self):
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assert self._constructed, "must be constructed by self.construct() first!"
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self.heartmonitor.start()
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self.log.info("Heartmonitor started")
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def construct_hub(self):
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"""construct"""
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client_iface = "%s://%s:"%(self.client_transport, self.client_ip) + "%i"
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engine_iface = "%s://%s:"%(self.engine_transport, self.engine_ip) + "%i"
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ctx = self.context
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loop = self.loop
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# Registrar socket
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q = ZMQStream(ctx.socket(zmq.XREP), loop)
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q.bind(client_iface % self.regport)
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self.log.info("Hub listening on %s for registration."%(client_iface%self.regport))
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if self.client_ip != self.engine_ip:
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q.bind(engine_iface % self.regport)
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self.log.info("Hub listening on %s for registration."%(engine_iface%self.regport))
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### Engine connections ###
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# heartbeat
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hpub = ctx.socket(zmq.PUB)
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hpub.bind(engine_iface % self.hb[0])
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hrep = ctx.socket(zmq.XREP)
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hrep.bind(engine_iface % self.hb[1])
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self.heartmonitor = HeartMonitor(loop=loop, pingstream=ZMQStream(hpub,loop), pongstream=ZMQStream(hrep,loop),
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period=self.ping, logname=self.log.name)
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### Client connections ###
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# Notifier socket
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n = ZMQStream(ctx.socket(zmq.PUB), loop)
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n.bind(client_iface%self.notifier_port)
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### build and launch the queues ###
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# monitor socket
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sub = ctx.socket(zmq.SUB)
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sub.setsockopt(zmq.SUBSCRIBE, "")
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sub.bind(self.monitor_url)
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sub.bind('inproc://monitor')
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sub = ZMQStream(sub, loop)
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# connect the db
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self.log.info('Hub using DB backend: %r'%(self.db_class.split()[-1]))
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# cdir = self.config.Global.cluster_dir
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self.db = import_item(self.db_class)(session=self.session.session, config=self.config)
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time.sleep(.25)
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# build connection dicts
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self.engine_info = {
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'control' : engine_iface%self.control[1],
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'mux': engine_iface%self.mux[1],
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'heartbeat': (engine_iface%self.hb[0], engine_iface%self.hb[1]),
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'task' : engine_iface%self.task[1],
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'iopub' : engine_iface%self.iopub[1],
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# 'monitor' : engine_iface%self.mon_port,
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}
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self.client_info = {
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'control' : client_iface%self.control[0],
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'mux': client_iface%self.mux[0],
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'task' : (self.scheme, client_iface%self.task[0]),
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'iopub' : client_iface%self.iopub[0],
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'notification': client_iface%self.notifier_port
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}
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self.log.debug("Hub engine addrs: %s"%self.engine_info)
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self.log.debug("Hub client addrs: %s"%self.client_info)
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self.hub = Hub(loop=loop, session=self.session, monitor=sub, heartmonitor=self.heartmonitor,
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query=q, notifier=n, db=self.db,
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engine_info=self.engine_info, client_info=self.client_info,
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logname=self.log.name)
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class Hub(LoggingFactory):
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"""The IPython Controller Hub with 0MQ connections
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Parameters
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==========
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loop: zmq IOLoop instance
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session: StreamSession object
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<removed> context: zmq context for creating new connections (?)
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queue: ZMQStream for monitoring the command queue (SUB)
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query: ZMQStream for engine registration and client queries requests (XREP)
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heartbeat: HeartMonitor object checking the pulse of the engines
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notifier: ZMQStream for broadcasting engine registration changes (PUB)
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db: connection to db for out of memory logging of commands
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NotImplemented
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engine_info: dict of zmq connection information for engines to connect
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to the queues.
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client_info: dict of zmq connection information for engines to connect
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to the queues.
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"""
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# internal data structures:
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ids=Set() # engine IDs
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keytable=Dict()
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by_ident=Dict()
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engines=Dict()
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clients=Dict()
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hearts=Dict()
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pending=Set()
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queues=Dict() # pending msg_ids keyed by engine_id
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tasks=Dict() # pending msg_ids submitted as tasks, keyed by client_id
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completed=Dict() # completed msg_ids keyed by engine_id
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all_completed=Set() # completed msg_ids keyed by engine_id
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# mia=None
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incoming_registrations=Dict()
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registration_timeout=Int()
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_idcounter=Int(0)
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# objects from constructor:
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loop=Instance(ioloop.IOLoop)
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query=Instance(ZMQStream)
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monitor=Instance(ZMQStream)
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heartmonitor=Instance(HeartMonitor)
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notifier=Instance(ZMQStream)
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db=Instance(object)
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client_info=Dict()
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engine_info=Dict()
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def __init__(self, **kwargs):
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"""
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# universal:
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loop: IOLoop for creating future connections
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session: streamsession for sending serialized data
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# engine:
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queue: ZMQStream for monitoring queue messages
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query: ZMQStream for engine+client registration and client requests
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heartbeat: HeartMonitor object for tracking engines
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# extra:
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db: ZMQStream for db connection (NotImplemented)
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engine_info: zmq address/protocol dict for engine connections
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client_info: zmq address/protocol dict for client connections
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"""
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super(Hub, self).__init__(**kwargs)
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self.registration_timeout = max(5000, 2*self.heartmonitor.period)
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# validate connection dicts:
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for k,v in self.client_info.iteritems():
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if k == 'task':
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validate_url_container(v[1])
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else:
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validate_url_container(v)
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# validate_url_container(self.client_info)
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validate_url_container(self.engine_info)
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# register our callbacks
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self.query.on_recv(self.dispatch_query)
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self.monitor.on_recv(self.dispatch_monitor_traffic)
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self.heartmonitor.add_heart_failure_handler(self.handle_heart_failure)
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self.heartmonitor.add_new_heart_handler(self.handle_new_heart)
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self.monitor_handlers = { 'in' : self.save_queue_request,
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'out': self.save_queue_result,
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'intask': self.save_task_request,
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'outtask': self.save_task_result,
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'tracktask': self.save_task_destination,
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'incontrol': _passer,
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'outcontrol': _passer,
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'iopub': self.save_iopub_message,
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}
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self.query_handlers = {'queue_request': self.queue_status,
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'result_request': self.get_results,
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'purge_request': self.purge_results,
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'load_request': self.check_load,
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'resubmit_request': self.resubmit_task,
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'shutdown_request': self.shutdown_request,
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'registration_request' : self.register_engine,
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'unregistration_request' : self.unregister_engine,
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'connection_request': self.connection_request,
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}
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self.log.info("hub::created hub")
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@property
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def _next_id(self):
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"""gemerate a new ID.
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No longer reuse old ids, just count from 0."""
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newid = self._idcounter
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self._idcounter += 1
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return newid
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# newid = 0
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# incoming = [id[0] for id in self.incoming_registrations.itervalues()]
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# # print newid, self.ids, self.incoming_registrations
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# while newid in self.ids or newid in incoming:
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# newid += 1
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# return newid
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#-----------------------------------------------------------------------------
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# message validation
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#-----------------------------------------------------------------------------
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def _validate_targets(self, targets):
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"""turn any valid targets argument into a list of integer ids"""
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if targets is None:
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# default to all
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targets = self.ids
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if isinstance(targets, (int,str,unicode)):
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# only one target specified
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targets = [targets]
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_targets = []
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for t in targets:
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# map raw identities to ids
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if isinstance(t, (str,unicode)):
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t = self.by_ident.get(t, t)
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_targets.append(t)
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targets = _targets
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bad_targets = [ t for t in targets if t not in self.ids ]
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if bad_targets:
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raise IndexError("No Such Engine: %r"%bad_targets)
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if not targets:
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raise IndexError("No Engines Registered")
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return targets
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#-----------------------------------------------------------------------------
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# dispatch methods (1 per stream)
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#-----------------------------------------------------------------------------
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# def dispatch_registration_request(self, msg):
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# """"""
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# self.log.debug("registration::dispatch_register_request(%s)"%msg)
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# idents,msg = self.session.feed_identities(msg)
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# if not idents:
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# self.log.error("Bad Query Message: %s"%msg, exc_info=True)
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# return
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# try:
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# msg = self.session.unpack_message(msg,content=True)
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# except:
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# self.log.error("registration::got bad registration message: %s"%msg, exc_info=True)
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# return
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#
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# msg_type = msg['msg_type']
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# content = msg['content']
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#
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# handler = self.query_handlers.get(msg_type, None)
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# if handler is None:
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# self.log.error("registration::got bad registration message: %s"%msg)
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# else:
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# handler(idents, msg)
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def dispatch_monitor_traffic(self, msg):
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"""all ME and Task queue messages come through here, as well as
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IOPub traffic."""
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self.log.debug("monitor traffic: %s"%msg[:2])
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switch = msg[0]
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|
idents, msg = self.session.feed_identities(msg[1:])
|
|
|
if not idents:
|
|
|
self.log.error("Bad Monitor Message: %s"%msg)
|
|
|
return
|
|
|
handler = self.monitor_handlers.get(switch, None)
|
|
|
if handler is not None:
|
|
|
handler(idents, msg)
|
|
|
else:
|
|
|
self.log.error("Invalid monitor topic: %s"%switch)
|
|
|
|
|
|
|
|
|
def dispatch_query(self, msg):
|
|
|
"""Route registration requests and queries from clients."""
|
|
|
idents, msg = self.session.feed_identities(msg)
|
|
|
if not idents:
|
|
|
self.log.error("Bad Query Message: %s"%msg)
|
|
|
return
|
|
|
client_id = idents[0]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=True)
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
self.log.error("Bad Query Message: %s"%msg, exc_info=True)
|
|
|
self.session.send(self.query, "hub_error", ident=client_id,
|
|
|
content=content)
|
|
|
return
|
|
|
|
|
|
# print client_id, header, parent, content
|
|
|
#switch on message type:
|
|
|
msg_type = msg['msg_type']
|
|
|
self.log.info("client::client %s requested %s"%(client_id, msg_type))
|
|
|
handler = self.query_handlers.get(msg_type, None)
|
|
|
try:
|
|
|
assert handler is not None, "Bad Message Type: %s"%msg_type
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
self.log.error("Bad Message Type: %s"%msg_type, exc_info=True)
|
|
|
self.session.send(self.query, "hub_error", ident=client_id,
|
|
|
content=content)
|
|
|
return
|
|
|
else:
|
|
|
handler(idents, msg)
|
|
|
|
|
|
def dispatch_db(self, msg):
|
|
|
""""""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# handler methods (1 per event)
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
#----------------------- Heartbeat --------------------------------------
|
|
|
|
|
|
def handle_new_heart(self, heart):
|
|
|
"""handler to attach to heartbeater.
|
|
|
Called when a new heart starts to beat.
|
|
|
Triggers completion of registration."""
|
|
|
self.log.debug("heartbeat::handle_new_heart(%r)"%heart)
|
|
|
if heart not in self.incoming_registrations:
|
|
|
self.log.info("heartbeat::ignoring new heart: %r"%heart)
|
|
|
else:
|
|
|
self.finish_registration(heart)
|
|
|
|
|
|
|
|
|
def handle_heart_failure(self, heart):
|
|
|
"""handler to attach to heartbeater.
|
|
|
called when a previously registered heart fails to respond to beat request.
|
|
|
triggers unregistration"""
|
|
|
self.log.debug("heartbeat::handle_heart_failure(%r)"%heart)
|
|
|
eid = self.hearts.get(heart, None)
|
|
|
queue = self.engines[eid].queue
|
|
|
if eid is None:
|
|
|
self.log.info("heartbeat::ignoring heart failure %r"%heart)
|
|
|
else:
|
|
|
self.unregister_engine(heart, dict(content=dict(id=eid, queue=queue)))
|
|
|
|
|
|
#----------------------- MUX Queue Traffic ------------------------------
|
|
|
|
|
|
def save_queue_request(self, idents, msg):
|
|
|
if len(idents) < 2:
|
|
|
self.log.error("invalid identity prefix: %s"%idents)
|
|
|
return
|
|
|
queue_id, client_id = idents[:2]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
self.log.error("queue::client %r sent invalid message to %r: %s"%(client_id, queue_id, msg), exc_info=True)
|
|
|
return
|
|
|
|
|
|
eid = self.by_ident.get(queue_id, None)
|
|
|
if eid is None:
|
|
|
self.log.error("queue::target %r not registered"%queue_id)
|
|
|
self.log.debug("queue:: valid are: %s"%(self.by_ident.keys()))
|
|
|
return
|
|
|
|
|
|
header = msg['header']
|
|
|
msg_id = header['msg_id']
|
|
|
record = init_record(msg)
|
|
|
record['engine_uuid'] = queue_id
|
|
|
record['client_uuid'] = client_id
|
|
|
record['queue'] = 'mux'
|
|
|
|
|
|
self.pending.add(msg_id)
|
|
|
self.queues[eid].append(msg_id)
|
|
|
self.db.add_record(msg_id, record)
|
|
|
|
|
|
def save_queue_result(self, idents, msg):
|
|
|
if len(idents) < 2:
|
|
|
self.log.error("invalid identity prefix: %s"%idents)
|
|
|
return
|
|
|
|
|
|
client_id, queue_id = idents[:2]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
self.log.error("queue::engine %r sent invalid message to %r: %s"%(
|
|
|
queue_id,client_id, msg), exc_info=True)
|
|
|
return
|
|
|
|
|
|
eid = self.by_ident.get(queue_id, None)
|
|
|
if eid is None:
|
|
|
self.log.error("queue::unknown engine %r is sending a reply: "%queue_id)
|
|
|
self.log.debug("queue:: %s"%msg[2:])
|
|
|
return
|
|
|
|
|
|
parent = msg['parent_header']
|
|
|
if not parent:
|
|
|
return
|
|
|
msg_id = parent['msg_id']
|
|
|
if msg_id in self.pending:
|
|
|
self.pending.remove(msg_id)
|
|
|
self.all_completed.add(msg_id)
|
|
|
self.queues[eid].remove(msg_id)
|
|
|
self.completed[eid].append(msg_id)
|
|
|
elif msg_id not in self.all_completed:
|
|
|
# it could be a result from a dead engine that died before delivering the
|
|
|
# result
|
|
|
self.log.warn("queue:: unknown msg finished %s"%msg_id)
|
|
|
return
|
|
|
# update record anyway, because the unregistration could have been premature
|
|
|
rheader = msg['header']
|
|
|
completed = datetime.strptime(rheader['date'], ISO8601)
|
|
|
started = rheader.get('started', None)
|
|
|
if started is not None:
|
|
|
started = datetime.strptime(started, ISO8601)
|
|
|
result = {
|
|
|
'result_header' : rheader,
|
|
|
'result_content': msg['content'],
|
|
|
'started' : started,
|
|
|
'completed' : completed
|
|
|
}
|
|
|
|
|
|
result['result_buffers'] = msg['buffers']
|
|
|
self.db.update_record(msg_id, result)
|
|
|
|
|
|
|
|
|
#--------------------- Task Queue Traffic ------------------------------
|
|
|
|
|
|
def save_task_request(self, idents, msg):
|
|
|
"""Save the submission of a task."""
|
|
|
client_id = idents[0]
|
|
|
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
self.log.error("task::client %r sent invalid task message: %s"%(
|
|
|
client_id, msg), exc_info=True)
|
|
|
return
|
|
|
record = init_record(msg)
|
|
|
|
|
|
record['client_uuid'] = client_id
|
|
|
record['queue'] = 'task'
|
|
|
header = msg['header']
|
|
|
msg_id = header['msg_id']
|
|
|
self.pending.add(msg_id)
|
|
|
self.db.add_record(msg_id, record)
|
|
|
|
|
|
def save_task_result(self, idents, msg):
|
|
|
"""save the result of a completed task."""
|
|
|
client_id = idents[0]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
self.log.error("task::invalid task result message send to %r: %s"%(
|
|
|
client_id, msg), exc_info=True)
|
|
|
raise
|
|
|
return
|
|
|
|
|
|
parent = msg['parent_header']
|
|
|
if not parent:
|
|
|
# print msg
|
|
|
self.log.warn("Task %r had no parent!"%msg)
|
|
|
return
|
|
|
msg_id = parent['msg_id']
|
|
|
|
|
|
header = msg['header']
|
|
|
engine_uuid = header.get('engine', None)
|
|
|
eid = self.by_ident.get(engine_uuid, None)
|
|
|
|
|
|
if msg_id in self.pending:
|
|
|
self.pending.remove(msg_id)
|
|
|
self.all_completed.add(msg_id)
|
|
|
if eid is not None:
|
|
|
self.completed[eid].append(msg_id)
|
|
|
if msg_id in self.tasks[eid]:
|
|
|
self.tasks[eid].remove(msg_id)
|
|
|
completed = datetime.strptime(header['date'], ISO8601)
|
|
|
started = header.get('started', None)
|
|
|
if started is not None:
|
|
|
started = datetime.strptime(started, ISO8601)
|
|
|
result = {
|
|
|
'result_header' : header,
|
|
|
'result_content': msg['content'],
|
|
|
'started' : started,
|
|
|
'completed' : completed,
|
|
|
'engine_uuid': engine_uuid
|
|
|
}
|
|
|
|
|
|
result['result_buffers'] = msg['buffers']
|
|
|
self.db.update_record(msg_id, result)
|
|
|
|
|
|
else:
|
|
|
self.log.debug("task::unknown task %s finished"%msg_id)
|
|
|
|
|
|
def save_task_destination(self, idents, msg):
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=True)
|
|
|
except:
|
|
|
self.log.error("task::invalid task tracking message", exc_info=True)
|
|
|
return
|
|
|
content = msg['content']
|
|
|
# print (content)
|
|
|
msg_id = content['msg_id']
|
|
|
engine_uuid = content['engine_id']
|
|
|
eid = self.by_ident[engine_uuid]
|
|
|
|
|
|
self.log.info("task::task %s arrived on %s"%(msg_id, eid))
|
|
|
# if msg_id in self.mia:
|
|
|
# self.mia.remove(msg_id)
|
|
|
# else:
|
|
|
# self.log.debug("task::task %s not listed as MIA?!"%(msg_id))
|
|
|
|
|
|
self.tasks[eid].append(msg_id)
|
|
|
# self.pending[msg_id][1].update(received=datetime.now(),engine=(eid,engine_uuid))
|
|
|
self.db.update_record(msg_id, dict(engine_uuid=engine_uuid))
|
|
|
|
|
|
def mia_task_request(self, idents, msg):
|
|
|
raise NotImplementedError
|
|
|
client_id = idents[0]
|
|
|
# content = dict(mia=self.mia,status='ok')
|
|
|
# self.session.send('mia_reply', content=content, idents=client_id)
|
|
|
|
|
|
|
|
|
#--------------------- IOPub Traffic ------------------------------
|
|
|
|
|
|
def save_iopub_message(self, topics, msg):
|
|
|
"""save an iopub message into the db"""
|
|
|
# print (topics)
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=True)
|
|
|
except:
|
|
|
self.log.error("iopub::invalid IOPub message", exc_info=True)
|
|
|
return
|
|
|
|
|
|
parent = msg['parent_header']
|
|
|
if not parent:
|
|
|
self.log.error("iopub::invalid IOPub message: %s"%msg)
|
|
|
return
|
|
|
msg_id = parent['msg_id']
|
|
|
msg_type = msg['msg_type']
|
|
|
content = msg['content']
|
|
|
|
|
|
# ensure msg_id is in db
|
|
|
try:
|
|
|
rec = self.db.get_record(msg_id)
|
|
|
except:
|
|
|
self.log.error("iopub::IOPub message has invalid parent", exc_info=True)
|
|
|
return
|
|
|
# stream
|
|
|
d = {}
|
|
|
if msg_type == 'stream':
|
|
|
name = content['name']
|
|
|
s = rec[name] or ''
|
|
|
d[name] = s + content['data']
|
|
|
|
|
|
elif msg_type == 'pyerr':
|
|
|
d['pyerr'] = content
|
|
|
else:
|
|
|
d[msg_type] = content['data']
|
|
|
|
|
|
self.db.update_record(msg_id, d)
|
|
|
|
|
|
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Registration requests
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def connection_request(self, client_id, msg):
|
|
|
"""Reply with connection addresses for clients."""
|
|
|
self.log.info("client::client %s connected"%client_id)
|
|
|
content = dict(status='ok')
|
|
|
content.update(self.client_info)
|
|
|
jsonable = {}
|
|
|
for k,v in self.keytable.iteritems():
|
|
|
jsonable[str(k)] = v
|
|
|
content['engines'] = jsonable
|
|
|
self.session.send(self.query, 'connection_reply', content, parent=msg, ident=client_id)
|
|
|
|
|
|
def register_engine(self, reg, msg):
|
|
|
"""Register a new engine."""
|
|
|
content = msg['content']
|
|
|
try:
|
|
|
queue = content['queue']
|
|
|
except KeyError:
|
|
|
self.log.error("registration::queue not specified", exc_info=True)
|
|
|
return
|
|
|
heart = content.get('heartbeat', None)
|
|
|
"""register a new engine, and create the socket(s) necessary"""
|
|
|
eid = self._next_id
|
|
|
# print (eid, queue, reg, heart)
|
|
|
|
|
|
self.log.debug("registration::register_engine(%i, %r, %r, %r)"%(eid, queue, reg, heart))
|
|
|
|
|
|
content = dict(id=eid,status='ok')
|
|
|
content.update(self.engine_info)
|
|
|
# check if requesting available IDs:
|
|
|
if queue in self.by_ident:
|
|
|
try:
|
|
|
raise KeyError("queue_id %r in use"%queue)
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
self.log.error("queue_id %r in use"%queue, exc_info=True)
|
|
|
elif heart in self.hearts: # need to check unique hearts?
|
|
|
try:
|
|
|
raise KeyError("heart_id %r in use"%heart)
|
|
|
except:
|
|
|
self.log.error("heart_id %r in use"%heart, exc_info=True)
|
|
|
content = error.wrap_exception()
|
|
|
else:
|
|
|
for h, pack in self.incoming_registrations.iteritems():
|
|
|
if heart == h:
|
|
|
try:
|
|
|
raise KeyError("heart_id %r in use"%heart)
|
|
|
except:
|
|
|
self.log.error("heart_id %r in use"%heart, exc_info=True)
|
|
|
content = error.wrap_exception()
|
|
|
break
|
|
|
elif queue == pack[1]:
|
|
|
try:
|
|
|
raise KeyError("queue_id %r in use"%queue)
|
|
|
except:
|
|
|
self.log.error("queue_id %r in use"%queue, exc_info=True)
|
|
|
content = error.wrap_exception()
|
|
|
break
|
|
|
|
|
|
msg = self.session.send(self.query, "registration_reply",
|
|
|
content=content,
|
|
|
ident=reg)
|
|
|
|
|
|
if content['status'] == 'ok':
|
|
|
if heart in self.heartmonitor.hearts:
|
|
|
# already beating
|
|
|
self.incoming_registrations[heart] = (eid,queue,reg[0],None)
|
|
|
self.finish_registration(heart)
|
|
|
else:
|
|
|
purge = lambda : self._purge_stalled_registration(heart)
|
|
|
dc = ioloop.DelayedCallback(purge, self.registration_timeout, self.loop)
|
|
|
dc.start()
|
|
|
self.incoming_registrations[heart] = (eid,queue,reg[0],dc)
|
|
|
else:
|
|
|
self.log.error("registration::registration %i failed: %s"%(eid, content['evalue']))
|
|
|
return eid
|
|
|
|
|
|
def unregister_engine(self, ident, msg):
|
|
|
"""Unregister an engine that explicitly requested to leave."""
|
|
|
try:
|
|
|
eid = msg['content']['id']
|
|
|
except:
|
|
|
self.log.error("registration::bad engine id for unregistration: %s"%ident, exc_info=True)
|
|
|
return
|
|
|
self.log.info("registration::unregister_engine(%s)"%eid)
|
|
|
# print (eid)
|
|
|
content=dict(id=eid, queue=self.engines[eid].queue)
|
|
|
self.ids.remove(eid)
|
|
|
uuid = self.keytable.pop(eid)
|
|
|
ec = self.engines.pop(eid)
|
|
|
self.hearts.pop(ec.heartbeat)
|
|
|
self.by_ident.pop(ec.queue)
|
|
|
self.completed.pop(eid)
|
|
|
self._handle_stranded_msgs(eid, uuid)
|
|
|
############## TODO: HANDLE IT ################
|
|
|
|
|
|
if self.notifier:
|
|
|
self.session.send(self.notifier, "unregistration_notification", content=content)
|
|
|
|
|
|
def _handle_stranded_msgs(self, eid, uuid):
|
|
|
"""Handle messages known to be on an engine when the engine unregisters.
|
|
|
|
|
|
It is possible that this will fire prematurely - that is, an engine will
|
|
|
go down after completing a result, and the client will be notified
|
|
|
that the result failed and later receive the actual result.
|
|
|
"""
|
|
|
|
|
|
outstanding = self.queues.pop(eid)
|
|
|
|
|
|
for msg_id in outstanding:
|
|
|
self.pending.remove(msg_id)
|
|
|
self.all_completed.add(msg_id)
|
|
|
try:
|
|
|
raise error.EngineError("Engine %r died while running task %r"%(eid, msg_id))
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
# build a fake header:
|
|
|
header = {}
|
|
|
header['engine'] = uuid
|
|
|
header['date'] = datetime.now().strftime(ISO8601)
|
|
|
rec = dict(result_content=content, result_header=header, result_buffers=[])
|
|
|
rec['completed'] = header['date']
|
|
|
rec['engine_uuid'] = uuid
|
|
|
self.db.update_record(msg_id, rec)
|
|
|
|
|
|
def finish_registration(self, heart):
|
|
|
"""Second half of engine registration, called after our HeartMonitor
|
|
|
has received a beat from the Engine's Heart."""
|
|
|
try:
|
|
|
(eid,queue,reg,purge) = self.incoming_registrations.pop(heart)
|
|
|
except KeyError:
|
|
|
self.log.error("registration::tried to finish nonexistant registration", exc_info=True)
|
|
|
return
|
|
|
self.log.info("registration::finished registering engine %i:%r"%(eid,queue))
|
|
|
if purge is not None:
|
|
|
purge.stop()
|
|
|
control = queue
|
|
|
self.ids.add(eid)
|
|
|
self.keytable[eid] = queue
|
|
|
self.engines[eid] = EngineConnector(id=eid, queue=queue, registration=reg,
|
|
|
control=control, heartbeat=heart)
|
|
|
self.by_ident[queue] = eid
|
|
|
self.queues[eid] = list()
|
|
|
self.tasks[eid] = list()
|
|
|
self.completed[eid] = list()
|
|
|
self.hearts[heart] = eid
|
|
|
content = dict(id=eid, queue=self.engines[eid].queue)
|
|
|
if self.notifier:
|
|
|
self.session.send(self.notifier, "registration_notification", content=content)
|
|
|
self.log.info("engine::Engine Connected: %i"%eid)
|
|
|
|
|
|
def _purge_stalled_registration(self, heart):
|
|
|
if heart in self.incoming_registrations:
|
|
|
eid = self.incoming_registrations.pop(heart)[0]
|
|
|
self.log.info("registration::purging stalled registration: %i"%eid)
|
|
|
else:
|
|
|
pass
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Client Requests
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def shutdown_request(self, client_id, msg):
|
|
|
"""handle shutdown request."""
|
|
|
# s = self.context.socket(zmq.XREQ)
|
|
|
# s.connect(self.client_connections['mux'])
|
|
|
# time.sleep(0.1)
|
|
|
# for eid,ec in self.engines.iteritems():
|
|
|
# self.session.send(s, 'shutdown_request', content=dict(restart=False), ident=ec.queue)
|
|
|
# time.sleep(1)
|
|
|
self.session.send(self.query, 'shutdown_reply', content={'status': 'ok'}, ident=client_id)
|
|
|
dc = ioloop.DelayedCallback(lambda : self._shutdown(), 1000, self.loop)
|
|
|
dc.start()
|
|
|
|
|
|
def _shutdown(self):
|
|
|
self.log.info("hub::hub shutting down.")
|
|
|
time.sleep(0.1)
|
|
|
sys.exit(0)
|
|
|
|
|
|
|
|
|
def check_load(self, client_id, msg):
|
|
|
content = msg['content']
|
|
|
try:
|
|
|
targets = content['targets']
|
|
|
targets = self._validate_targets(targets)
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
self.session.send(self.query, "hub_error",
|
|
|
content=content, ident=client_id)
|
|
|
return
|
|
|
|
|
|
content = dict(status='ok')
|
|
|
# loads = {}
|
|
|
for t in targets:
|
|
|
content[bytes(t)] = len(self.queues[t])+len(self.tasks[t])
|
|
|
self.session.send(self.query, "load_reply", content=content, ident=client_id)
|
|
|
|
|
|
|
|
|
def queue_status(self, client_id, msg):
|
|
|
"""Return the Queue status of one or more targets.
|
|
|
if verbose: return the msg_ids
|
|
|
else: return len of each type.
|
|
|
keys: queue (pending MUX jobs)
|
|
|
tasks (pending Task jobs)
|
|
|
completed (finished jobs from both queues)"""
|
|
|
content = msg['content']
|
|
|
targets = content['targets']
|
|
|
try:
|
|
|
targets = self._validate_targets(targets)
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
self.session.send(self.query, "hub_error",
|
|
|
content=content, ident=client_id)
|
|
|
return
|
|
|
verbose = content.get('verbose', False)
|
|
|
content = dict(status='ok')
|
|
|
for t in targets:
|
|
|
queue = self.queues[t]
|
|
|
completed = self.completed[t]
|
|
|
tasks = self.tasks[t]
|
|
|
if not verbose:
|
|
|
queue = len(queue)
|
|
|
completed = len(completed)
|
|
|
tasks = len(tasks)
|
|
|
content[bytes(t)] = {'queue': queue, 'completed': completed , 'tasks': tasks}
|
|
|
# pending
|
|
|
self.session.send(self.query, "queue_reply", content=content, ident=client_id)
|
|
|
|
|
|
def purge_results(self, client_id, msg):
|
|
|
"""Purge results from memory. This method is more valuable before we move
|
|
|
to a DB based message storage mechanism."""
|
|
|
content = msg['content']
|
|
|
msg_ids = content.get('msg_ids', [])
|
|
|
reply = dict(status='ok')
|
|
|
if msg_ids == 'all':
|
|
|
self.db.drop_matching_records(dict(completed={'$ne':None}))
|
|
|
else:
|
|
|
for msg_id in msg_ids:
|
|
|
if msg_id in self.all_completed:
|
|
|
self.db.drop_record(msg_id)
|
|
|
else:
|
|
|
if msg_id in self.pending:
|
|
|
try:
|
|
|
raise IndexError("msg pending: %r"%msg_id)
|
|
|
except:
|
|
|
reply = error.wrap_exception()
|
|
|
else:
|
|
|
try:
|
|
|
raise IndexError("No such msg: %r"%msg_id)
|
|
|
except:
|
|
|
reply = error.wrap_exception()
|
|
|
break
|
|
|
eids = content.get('engine_ids', [])
|
|
|
for eid in eids:
|
|
|
if eid not in self.engines:
|
|
|
try:
|
|
|
raise IndexError("No such engine: %i"%eid)
|
|
|
except:
|
|
|
reply = error.wrap_exception()
|
|
|
break
|
|
|
msg_ids = self.completed.pop(eid)
|
|
|
uid = self.engines[eid].queue
|
|
|
self.db.drop_matching_records(dict(engine_uuid=uid, completed={'$ne':None}))
|
|
|
|
|
|
self.session.send(self.query, 'purge_reply', content=reply, ident=client_id)
|
|
|
|
|
|
def resubmit_task(self, client_id, msg, buffers):
|
|
|
"""Resubmit a task."""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
def get_results(self, client_id, msg):
|
|
|
"""Get the result of 1 or more messages."""
|
|
|
content = msg['content']
|
|
|
msg_ids = sorted(set(content['msg_ids']))
|
|
|
statusonly = content.get('status_only', False)
|
|
|
pending = []
|
|
|
completed = []
|
|
|
content = dict(status='ok')
|
|
|
content['pending'] = pending
|
|
|
content['completed'] = completed
|
|
|
buffers = []
|
|
|
if not statusonly:
|
|
|
content['results'] = {}
|
|
|
records = self.db.find_records(dict(msg_id={'$in':msg_ids}))
|
|
|
for msg_id in msg_ids:
|
|
|
if msg_id in self.pending:
|
|
|
pending.append(msg_id)
|
|
|
elif msg_id in self.all_completed:
|
|
|
completed.append(msg_id)
|
|
|
if not statusonly:
|
|
|
rec = records[msg_id]
|
|
|
io_dict = {}
|
|
|
for key in 'pyin pyout pyerr stdout stderr'.split():
|
|
|
io_dict[key] = rec[key]
|
|
|
content[msg_id] = { 'result_content': rec['result_content'],
|
|
|
'header': rec['header'],
|
|
|
'result_header' : rec['result_header'],
|
|
|
'io' : io_dict,
|
|
|
}
|
|
|
if rec['result_buffers']:
|
|
|
buffers.extend(map(str, rec['result_buffers']))
|
|
|
else:
|
|
|
try:
|
|
|
raise KeyError('No such message: '+msg_id)
|
|
|
except:
|
|
|
content = error.wrap_exception()
|
|
|
break
|
|
|
self.session.send(self.query, "result_reply", content=content,
|
|
|
parent=msg, ident=client_id,
|
|
|
buffers=buffers)
|
|
|
|
|
|
|
