|
|
#!/usr/bin/env python
|
|
|
"""The IPython Controller Hub with 0MQ
|
|
|
This is the master object that handles connections from engines and clients,
|
|
|
and monitors traffic through the various queues.
|
|
|
"""
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2010 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
|
|
|
#-----------------------------------------------------------------------------
|
|
|
from __future__ import print_function
|
|
|
|
|
|
import sys
|
|
|
from datetime import datetime
|
|
|
import time
|
|
|
|
|
|
import zmq
|
|
|
from zmq.eventloop import ioloop
|
|
|
|
|
|
# internal:
|
|
|
from IPython.zmq.log import logger # a Logger object
|
|
|
|
|
|
from streamsession import Message, wrap_exception, ISO8601
|
|
|
|
|
|
try:
|
|
|
from pymongo.binary import Binary
|
|
|
except ImportError:
|
|
|
MongoDB=None
|
|
|
else:
|
|
|
from mongodb import MongoDB
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Code
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def _passer(*args, **kwargs):
|
|
|
return
|
|
|
|
|
|
def init_record(msg):
|
|
|
"""return an empty TaskRecord dict, with all keys initialized with None."""
|
|
|
header = msg['header']
|
|
|
return {
|
|
|
'msg_id' : header['msg_id'],
|
|
|
'header' : header,
|
|
|
'content': msg['content'],
|
|
|
'buffers': msg['buffers'],
|
|
|
'submitted': datetime.strptime(header['date'], ISO8601),
|
|
|
'client_uuid' : None,
|
|
|
'engine_uuid' : None,
|
|
|
'started': None,
|
|
|
'completed': None,
|
|
|
'resubmitted': None,
|
|
|
'result_header' : None,
|
|
|
'result_content' : None,
|
|
|
'result_buffers' : None,
|
|
|
'queue' : None
|
|
|
}
|
|
|
|
|
|
|
|
|
class EngineConnector(object):
|
|
|
"""A simple object for accessing the various zmq connections of an object.
|
|
|
Attributes are:
|
|
|
id (int): engine ID
|
|
|
uuid (str): uuid (unused?)
|
|
|
queue (str): identity of queue's XREQ socket
|
|
|
registration (str): identity of registration XREQ socket
|
|
|
heartbeat (str): identity of heartbeat XREQ socket
|
|
|
"""
|
|
|
id=0
|
|
|
queue=None
|
|
|
control=None
|
|
|
registration=None
|
|
|
heartbeat=None
|
|
|
pending=None
|
|
|
|
|
|
def __init__(self, id, queue, registration, control, heartbeat=None):
|
|
|
logger.info("engine::Engine Connected: %i"%id)
|
|
|
self.id = id
|
|
|
self.queue = queue
|
|
|
self.registration = registration
|
|
|
self.control = control
|
|
|
self.heartbeat = heartbeat
|
|
|
|
|
|
class Hub(object):
|
|
|
"""The IPython Controller Hub with 0MQ connections
|
|
|
|
|
|
Parameters
|
|
|
==========
|
|
|
loop: zmq IOLoop instance
|
|
|
session: StreamSession object
|
|
|
<removed> context: zmq context for creating new connections (?)
|
|
|
queue: ZMQStream for monitoring the command queue (SUB)
|
|
|
registrar: ZMQStream for engine registration requests (XREP)
|
|
|
heartbeat: HeartMonitor object checking the pulse of the engines
|
|
|
clientele: ZMQStream for client connections (XREP)
|
|
|
not used for jobs, only query/control commands
|
|
|
notifier: ZMQStream for broadcasting engine registration changes (PUB)
|
|
|
db: connection to db for out of memory logging of commands
|
|
|
NotImplemented
|
|
|
engine_addrs: dict of zmq connection information for engines to connect
|
|
|
to the queues.
|
|
|
client_addrs: dict of zmq connection information for engines to connect
|
|
|
to the queues.
|
|
|
"""
|
|
|
# internal data structures:
|
|
|
ids=None # engine IDs
|
|
|
keytable=None
|
|
|
engines=None
|
|
|
clients=None
|
|
|
hearts=None
|
|
|
pending=None
|
|
|
results=None
|
|
|
tasks=None
|
|
|
completed=None
|
|
|
mia=None
|
|
|
incoming_registrations=None
|
|
|
registration_timeout=None
|
|
|
|
|
|
#objects from constructor:
|
|
|
loop=None
|
|
|
registrar=None
|
|
|
clientelle=None
|
|
|
queue=None
|
|
|
heartbeat=None
|
|
|
notifier=None
|
|
|
db=None
|
|
|
client_addr=None
|
|
|
engine_addrs=None
|
|
|
|
|
|
|
|
|
def __init__(self, loop, session, queue, registrar, heartbeat, clientele, notifier, db, engine_addrs, client_addrs):
|
|
|
"""
|
|
|
# universal:
|
|
|
loop: IOLoop for creating future connections
|
|
|
session: streamsession for sending serialized data
|
|
|
# engine:
|
|
|
queue: ZMQStream for monitoring queue messages
|
|
|
registrar: ZMQStream for engine registration
|
|
|
heartbeat: HeartMonitor object for tracking engines
|
|
|
# client:
|
|
|
clientele: ZMQStream for client connections
|
|
|
# extra:
|
|
|
db: ZMQStream for db connection (NotImplemented)
|
|
|
engine_addrs: zmq address/protocol dict for engine connections
|
|
|
client_addrs: zmq address/protocol dict for client connections
|
|
|
"""
|
|
|
self.ids = set()
|
|
|
self.keytable={}
|
|
|
self.incoming_registrations={}
|
|
|
self.engines = {}
|
|
|
self.by_ident = {}
|
|
|
self.clients = {}
|
|
|
self.hearts = {}
|
|
|
# self.mia = set()
|
|
|
|
|
|
# self.sockets = {}
|
|
|
self.loop = loop
|
|
|
self.session = session
|
|
|
self.registrar = registrar
|
|
|
self.clientele = clientele
|
|
|
self.queue = queue
|
|
|
self.heartbeat = heartbeat
|
|
|
self.notifier = notifier
|
|
|
self.db = db
|
|
|
|
|
|
# validate connection dicts:
|
|
|
self.client_addrs = client_addrs
|
|
|
assert isinstance(client_addrs['queue'], str)
|
|
|
assert isinstance(client_addrs['control'], str)
|
|
|
# self.hb_addrs = hb_addrs
|
|
|
self.engine_addrs = engine_addrs
|
|
|
assert isinstance(engine_addrs['queue'], str)
|
|
|
assert isinstance(client_addrs['control'], str)
|
|
|
assert len(engine_addrs['heartbeat']) == 2
|
|
|
|
|
|
# register our callbacks
|
|
|
self.registrar.on_recv(self.dispatch_register_request)
|
|
|
self.clientele.on_recv(self.dispatch_client_msg)
|
|
|
self.queue.on_recv(self.dispatch_queue_traffic)
|
|
|
|
|
|
if heartbeat is not None:
|
|
|
heartbeat.add_heart_failure_handler(self.handle_heart_failure)
|
|
|
heartbeat.add_new_heart_handler(self.handle_new_heart)
|
|
|
|
|
|
self.queue_handlers = { 'in' : self.save_queue_request,
|
|
|
'out': self.save_queue_result,
|
|
|
'intask': self.save_task_request,
|
|
|
'outtask': self.save_task_result,
|
|
|
'tracktask': self.save_task_destination,
|
|
|
'incontrol': _passer,
|
|
|
'outcontrol': _passer,
|
|
|
}
|
|
|
|
|
|
self.client_handlers = {'queue_request': self.queue_status,
|
|
|
'result_request': self.get_results,
|
|
|
'purge_request': self.purge_results,
|
|
|
'load_request': self.check_load,
|
|
|
'resubmit_request': self.resubmit_task,
|
|
|
'shutdown_request': self.shutdown_request,
|
|
|
}
|
|
|
|
|
|
self.registrar_handlers = {'registration_request' : self.register_engine,
|
|
|
'unregistration_request' : self.unregister_engine,
|
|
|
'connection_request': self.connection_request,
|
|
|
}
|
|
|
self.registration_timeout = max(5000, 2*self.heartbeat.period)
|
|
|
# this is the stuff that will move to DB:
|
|
|
# self.results = {} # completed results
|
|
|
self.pending = set() # pending messages, keyed by msg_id
|
|
|
self.queues = {} # pending msg_ids keyed by engine_id
|
|
|
self.tasks = {} # pending msg_ids submitted as tasks, keyed by client_id
|
|
|
self.completed = {} # completed msg_ids keyed by engine_id
|
|
|
self.all_completed = set()
|
|
|
|
|
|
logger.info("controller::created controller")
|
|
|
|
|
|
def _new_id(self):
|
|
|
"""gemerate a new ID"""
|
|
|
newid = 0
|
|
|
incoming = [id[0] for id in self.incoming_registrations.itervalues()]
|
|
|
# print newid, self.ids, self.incoming_registrations
|
|
|
while newid in self.ids or newid in incoming:
|
|
|
newid += 1
|
|
|
return newid
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# message validation
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def _validate_targets(self, targets):
|
|
|
"""turn any valid targets argument into a list of integer ids"""
|
|
|
if targets is None:
|
|
|
# default to all
|
|
|
targets = self.ids
|
|
|
|
|
|
if isinstance(targets, (int,str,unicode)):
|
|
|
# only one target specified
|
|
|
targets = [targets]
|
|
|
_targets = []
|
|
|
for t in targets:
|
|
|
# map raw identities to ids
|
|
|
if isinstance(t, (str,unicode)):
|
|
|
t = self.by_ident.get(t, t)
|
|
|
_targets.append(t)
|
|
|
targets = _targets
|
|
|
bad_targets = [ t for t in targets if t not in self.ids ]
|
|
|
if bad_targets:
|
|
|
raise IndexError("No Such Engine: %r"%bad_targets)
|
|
|
if not targets:
|
|
|
raise IndexError("No Engines Registered")
|
|
|
return targets
|
|
|
|
|
|
def _validate_client_msg(self, msg):
|
|
|
"""validates and unpacks headers of a message. Returns False if invalid,
|
|
|
(ident, header, parent, content)"""
|
|
|
client_id = msg[0]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg[1:], content=True)
|
|
|
except:
|
|
|
logger.error("client::Invalid Message %s"%msg)
|
|
|
return False
|
|
|
|
|
|
msg_type = msg.get('msg_type', None)
|
|
|
if msg_type is None:
|
|
|
return False
|
|
|
header = msg.get('header')
|
|
|
# session doesn't handle split content for now:
|
|
|
return client_id, msg
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# dispatch methods (1 per stream)
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def dispatch_register_request(self, msg):
|
|
|
""""""
|
|
|
logger.debug("registration::dispatch_register_request(%s)"%msg)
|
|
|
idents,msg = self.session.feed_identities(msg)
|
|
|
if not idents:
|
|
|
logger.error("Bad Queue Message: %s"%msg, exc_info=True)
|
|
|
return
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg,content=True)
|
|
|
except:
|
|
|
logger.error("registration::got bad registration message: %s"%msg, exc_info=True)
|
|
|
return
|
|
|
|
|
|
msg_type = msg['msg_type']
|
|
|
content = msg['content']
|
|
|
|
|
|
handler = self.registrar_handlers.get(msg_type, None)
|
|
|
if handler is None:
|
|
|
logger.error("registration::got bad registration message: %s"%msg)
|
|
|
else:
|
|
|
handler(idents, msg)
|
|
|
|
|
|
def dispatch_queue_traffic(self, msg):
|
|
|
"""all ME and Task queue messages come through here"""
|
|
|
logger.debug("queue traffic: %s"%msg[:2])
|
|
|
switch = msg[0]
|
|
|
idents, msg = self.session.feed_identities(msg[1:])
|
|
|
if not idents:
|
|
|
logger.error("Bad Queue Message: %s"%msg)
|
|
|
return
|
|
|
handler = self.queue_handlers.get(switch, None)
|
|
|
if handler is not None:
|
|
|
handler(idents, msg)
|
|
|
else:
|
|
|
logger.error("Invalid message topic: %s"%switch)
|
|
|
|
|
|
|
|
|
def dispatch_client_msg(self, msg):
|
|
|
"""Route messages from clients"""
|
|
|
idents, msg = self.session.feed_identities(msg)
|
|
|
if not idents:
|
|
|
logger.error("Bad Client Message: %s"%msg)
|
|
|
return
|
|
|
client_id = idents[0]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=True)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
logger.error("Bad Client Message: %s"%msg, exc_info=True)
|
|
|
self.session.send(self.clientele, "controller_error", ident=client_id,
|
|
|
content=content)
|
|
|
return
|
|
|
|
|
|
# print client_id, header, parent, content
|
|
|
#switch on message type:
|
|
|
msg_type = msg['msg_type']
|
|
|
logger.info("client:: client %s requested %s"%(client_id, msg_type))
|
|
|
handler = self.client_handlers.get(msg_type, None)
|
|
|
try:
|
|
|
assert handler is not None, "Bad Message Type: %s"%msg_type
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
logger.error("Bad Message Type: %s"%msg_type, exc_info=True)
|
|
|
self.session.send(self.clientele, "controller_error", ident=client_id,
|
|
|
content=content)
|
|
|
return
|
|
|
else:
|
|
|
handler(client_id, 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."""
|
|
|
logger.debug("heartbeat::handle_new_heart(%r)"%heart)
|
|
|
if heart not in self.incoming_registrations:
|
|
|
logger.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"""
|
|
|
logger.debug("heartbeat::handle_heart_failure(%r)"%heart)
|
|
|
eid = self.hearts.get(heart, None)
|
|
|
queue = self.engines[eid].queue
|
|
|
if eid is None:
|
|
|
logger.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:
|
|
|
logger.error("invalid identity prefix: %s"%idents)
|
|
|
return
|
|
|
queue_id, client_id = idents[:2]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
logger.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:
|
|
|
logger.error("queue::target %r not registered"%queue_id)
|
|
|
logger.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'
|
|
|
if MongoDB is not None and isinstance(self.db, MongoDB):
|
|
|
record['buffers'] = map(Binary, record['buffers'])
|
|
|
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:
|
|
|
logger.error("invalid identity prefix: %s"%idents)
|
|
|
return
|
|
|
|
|
|
client_id, queue_id = idents[:2]
|
|
|
try:
|
|
|
msg = self.session.unpack_message(msg, content=False)
|
|
|
except:
|
|
|
logger.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:
|
|
|
logger.error("queue::unknown engine %r is sending a reply: "%queue_id)
|
|
|
logger.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)
|
|
|
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
|
|
|
}
|
|
|
if MongoDB is not None and isinstance(self.db, MongoDB):
|
|
|
result['result_buffers'] = map(Binary, msg['buffers'])
|
|
|
else:
|
|
|
result['result_buffers'] = msg['buffers']
|
|
|
self.db.update_record(msg_id, result)
|
|
|
else:
|
|
|
logger.debug("queue:: unknown msg finished %s"%msg_id)
|
|
|
|
|
|
#--------------------- 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:
|
|
|
logger.error("task::client %r sent invalid task message: %s"%(
|
|
|
client_id, msg), exc_info=True)
|
|
|
return
|
|
|
record = init_record(msg)
|
|
|
if MongoDB is not None and isinstance(self.db, MongoDB):
|
|
|
record['buffers'] = map(Binary, record['buffers'])
|
|
|
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:
|
|
|
logger.error("task::invalid task result message send to %r: %s"%(
|
|
|
client_id, msg))
|
|
|
raise
|
|
|
return
|
|
|
|
|
|
parent = msg['parent_header']
|
|
|
if not parent:
|
|
|
# print msg
|
|
|
logger.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
|
|
|
}
|
|
|
if MongoDB is not None and isinstance(self.db, MongoDB):
|
|
|
result['result_buffers'] = map(Binary, msg['buffers'])
|
|
|
else:
|
|
|
result['result_buffers'] = msg['buffers']
|
|
|
self.db.update_record(msg_id, result)
|
|
|
|
|
|
else:
|
|
|
logger.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:
|
|
|
logger.error("task::invalid task tracking message")
|
|
|
return
|
|
|
content = msg['content']
|
|
|
print (content)
|
|
|
msg_id = content['msg_id']
|
|
|
engine_uuid = content['engine_id']
|
|
|
eid = self.by_ident[engine_uuid]
|
|
|
|
|
|
logger.info("task::task %s arrived on %s"%(msg_id, eid))
|
|
|
# if msg_id in self.mia:
|
|
|
# self.mia.remove(msg_id)
|
|
|
# else:
|
|
|
# logger.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)
|
|
|
|
|
|
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Registration requests
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def connection_request(self, client_id, msg):
|
|
|
"""Reply with connection addresses for clients."""
|
|
|
logger.info("client::client %s connected"%client_id)
|
|
|
content = dict(status='ok')
|
|
|
content.update(self.client_addrs)
|
|
|
jsonable = {}
|
|
|
for k,v in self.keytable.iteritems():
|
|
|
jsonable[str(k)] = v
|
|
|
content['engines'] = jsonable
|
|
|
self.session.send(self.registrar, '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:
|
|
|
logger.error("registration::queue not specified")
|
|
|
return
|
|
|
heart = content.get('heartbeat', None)
|
|
|
"""register a new engine, and create the socket(s) necessary"""
|
|
|
eid = self._new_id()
|
|
|
# print (eid, queue, reg, heart)
|
|
|
|
|
|
logger.debug("registration::register_engine(%i, %r, %r, %r)"%(eid, queue, reg, heart))
|
|
|
|
|
|
content = dict(id=eid,status='ok')
|
|
|
content.update(self.engine_addrs)
|
|
|
# check if requesting available IDs:
|
|
|
if queue in self.by_ident:
|
|
|
try:
|
|
|
raise KeyError("queue_id %r in use"%queue)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
elif heart in self.hearts: # need to check unique hearts?
|
|
|
try:
|
|
|
raise KeyError("heart_id %r in use"%heart)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
else:
|
|
|
for h, pack in self.incoming_registrations.iteritems():
|
|
|
if heart == h:
|
|
|
try:
|
|
|
raise KeyError("heart_id %r in use"%heart)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
break
|
|
|
elif queue == pack[1]:
|
|
|
try:
|
|
|
raise KeyError("queue_id %r in use"%queue)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
break
|
|
|
|
|
|
msg = self.session.send(self.registrar, "registration_reply",
|
|
|
content=content,
|
|
|
ident=reg)
|
|
|
|
|
|
if content['status'] == 'ok':
|
|
|
if heart in self.heartbeat.hearts:
|
|
|
# already beating
|
|
|
self.incoming_registrations[heart] = (eid,queue,reg,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,dc)
|
|
|
else:
|
|
|
logger.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:
|
|
|
logger.error("registration::bad engine id for unregistration: %s"%ident)
|
|
|
return
|
|
|
logger.info("registration::unregister_engine(%s)"%eid)
|
|
|
content=dict(id=eid, queue=self.engines[eid].queue)
|
|
|
self.ids.remove(eid)
|
|
|
self.keytable.pop(eid)
|
|
|
ec = self.engines.pop(eid)
|
|
|
self.hearts.pop(ec.heartbeat)
|
|
|
self.by_ident.pop(ec.queue)
|
|
|
self.completed.pop(eid)
|
|
|
for msg_id in self.queues.pop(eid):
|
|
|
msg = self.pending.remove(msg_id)
|
|
|
############## TODO: HANDLE IT ################
|
|
|
|
|
|
if self.notifier:
|
|
|
self.session.send(self.notifier, "unregistration_notification", content=content)
|
|
|
|
|
|
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:
|
|
|
logger.error("registration::tried to finish nonexistant registration")
|
|
|
return
|
|
|
logger.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(eid, queue, reg, control, 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)
|
|
|
|
|
|
def _purge_stalled_registration(self, heart):
|
|
|
if heart in self.incoming_registrations:
|
|
|
eid = self.incoming_registrations.pop(heart)[0]
|
|
|
logger.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.clientele, 'shutdown_reply', content={'status': 'ok'}, ident=client_id)
|
|
|
dc = ioloop.DelayedCallback(lambda : self._shutdown(), 1000, self.loop)
|
|
|
dc.start()
|
|
|
|
|
|
def _shutdown(self):
|
|
|
logger.info("controller::controller 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 = wrap_exception()
|
|
|
self.session.send(self.clientele, "controller_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.clientele, "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 = wrap_exception()
|
|
|
self.session.send(self.clientele, "controller_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.clientele, "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={'$ne':None}))
|
|
|
else:
|
|
|
for msg_id in msg_ids:
|
|
|
if msg_id in self.all_completed:
|
|
|
self.db.drop_record(msg_id)
|
|
|
else:
|
|
|
if msg_id in self.pending:
|
|
|
try:
|
|
|
raise IndexError("msg pending: %r"%msg_id)
|
|
|
except:
|
|
|
reply = wrap_exception()
|
|
|
else:
|
|
|
try:
|
|
|
raise IndexError("No such msg: %r"%msg_id)
|
|
|
except:
|
|
|
reply = wrap_exception()
|
|
|
break
|
|
|
eids = content.get('engine_ids', [])
|
|
|
for eid in eids:
|
|
|
if eid not in self.engines:
|
|
|
try:
|
|
|
raise IndexError("No such engine: %i"%eid)
|
|
|
except:
|
|
|
reply = wrap_exception()
|
|
|
break
|
|
|
msg_ids = self.completed.pop(eid)
|
|
|
uid = self.engines[eid].queue
|
|
|
self.db.drop_matching_records(dict(engine_uuid=uid, completed={'$ne':None}))
|
|
|
|
|
|
self.session.send(self.clientele, '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]
|
|
|
content[msg_id] = { 'result_content': rec['result_content'],
|
|
|
'header': rec['header'],
|
|
|
'result_header' : rec['result_header'],
|
|
|
}
|
|
|
buffers.extend(map(str, rec['result_buffers']))
|
|
|
else:
|
|
|
try:
|
|
|
raise KeyError('No such message: '+msg_id)
|
|
|
except:
|
|
|
content = wrap_exception()
|
|
|
break
|
|
|
self.session.send(self.clientele, "result_reply", content=content,
|
|
|
parent=msg, ident=client_id,
|
|
|
buffers=buffers)
|
|
|
|
|
|
|
