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"""A semi-synchronous Client for the ZMQ controller"""
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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 time
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from pprint import pprint
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import zmq
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from zmq.eventloop import ioloop, zmqstream
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from IPython.external.decorator import decorator
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import streamsession as ss
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from remotenamespace import RemoteNamespace
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from view import DirectView
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from dependency import Dependency, depend, require
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def _push(ns):
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globals().update(ns)
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def _pull(keys):
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g = globals()
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if isinstance(keys, (list,tuple, set)):
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return map(g.get, keys)
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else:
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return g.get(keys)
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def _clear():
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globals().clear()
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def execute(code):
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exec code in globals()
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#--------------------------------------------------------------------------
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# Decorators for Client methods
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#--------------------------------------------------------------------------
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@decorator
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def spinfirst(f, self, *args, **kwargs):
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"""Call spin() to sync state prior to calling the method."""
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self.spin()
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return f(self, *args, **kwargs)
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@decorator
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def defaultblock(f, self, *args, **kwargs):
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"""Default to self.block; preserve self.block."""
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block = kwargs.get('block',None)
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block = self.block if block is None else block
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saveblock = self.block
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self.block = block
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ret = f(self, *args, **kwargs)
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self.block = saveblock
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return ret
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#--------------------------------------------------------------------------
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# Classes
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#--------------------------------------------------------------------------
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class AbortedTask(object):
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"""A basic wrapper object describing an aborted task."""
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def __init__(self, msg_id):
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self.msg_id = msg_id
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class ControllerError(Exception):
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def __init__(self, etype, evalue, tb):
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self.etype = etype
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self.evalue = evalue
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self.traceback=tb
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class Client(object):
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"""A semi-synchronous client to the IPython ZMQ controller
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Parameters
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----------
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addr : bytes; zmq url, e.g. 'tcp://127.0.0.1:10101
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The address of the controller's registration socket.
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Attributes
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----------
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ids : set of int engine IDs
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requesting the ids attribute always synchronizes
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the registration state. To request ids without synchronization,
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use semi-private _ids.
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history : list of msg_ids
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a list of msg_ids, keeping track of all the execution
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messages you have submitted in order.
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outstanding : set of msg_ids
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a set of msg_ids that have been submitted, but whose
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results have not yet been received.
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results : dict
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a dict of all our results, keyed by msg_id
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block : bool
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determines default behavior when block not specified
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in execution methods
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Methods
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-------
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spin : flushes incoming results and registration state changes
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control methods spin, and requesting `ids` also ensures up to date
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barrier : wait on one or more msg_ids
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execution methods: apply/apply_bound/apply_to/applu_bount
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legacy: execute, run
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query methods: queue_status, get_result, purge
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control methods: abort, kill
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"""
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_connected=False
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_engines=None
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_addr='tcp://127.0.0.1:10101'
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_registration_socket=None
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_query_socket=None
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_control_socket=None
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_notification_socket=None
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_mux_socket=None
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_task_socket=None
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block = False
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outstanding=None
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results = None
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history = None
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debug = False
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def __init__(self, addr='tcp://127.0.0.1:10101', context=None, username=None, debug=False):
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if context is None:
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context = zmq.Context()
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self.context = context
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self._addr = addr
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if username is None:
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self.session = ss.StreamSession()
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else:
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self.session = ss.StreamSession(username)
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self._registration_socket = self.context.socket(zmq.PAIR)
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self._registration_socket.setsockopt(zmq.IDENTITY, self.session.session)
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self._registration_socket.connect(addr)
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self._engines = {}
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self._ids = set()
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self.outstanding=set()
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self.results = {}
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self.history = []
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self.debug = debug
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self.session.debug = debug
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self._notification_handlers = {'registration_notification' : self._register_engine,
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'unregistration_notification' : self._unregister_engine,
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}
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self._queue_handlers = {'execute_reply' : self._handle_execute_reply,
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'apply_reply' : self._handle_apply_reply}
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self._connect()
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@property
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def ids(self):
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"""Always up to date ids property."""
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self._flush_notifications()
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return self._ids
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def _update_engines(self, engines):
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"""Update our engines dict and _ids from a dict of the form: {id:uuid}."""
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for k,v in engines.iteritems():
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eid = int(k)
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self._engines[eid] = bytes(v) # force not unicode
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self._ids.add(eid)
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def _build_targets(self, targets):
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"""Turn valid target IDs or 'all' into two lists:
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(int_ids, uuids).
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"""
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if targets is None:
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targets = self._ids
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elif isinstance(targets, str):
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if targets.lower() == 'all':
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targets = self._ids
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else:
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raise TypeError("%r not valid str target, must be 'all'"%(targets))
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elif isinstance(targets, int):
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targets = [targets]
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return [self._engines[t] for t in targets], list(targets)
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def _connect(self):
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"""setup all our socket connections to the controller. This is called from
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__init__."""
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if self._connected:
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return
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self._connected=True
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self.session.send(self._registration_socket, 'connection_request')
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idents,msg = self.session.recv(self._registration_socket,mode=0)
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if self.debug:
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pprint(msg)
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msg = ss.Message(msg)
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content = msg.content
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if content.status == 'ok':
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if content.queue:
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self._mux_socket = self.context.socket(zmq.PAIR)
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self._mux_socket.setsockopt(zmq.IDENTITY, self.session.session)
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self._mux_socket.connect(content.queue)
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if content.task:
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self._task_socket = self.context.socket(zmq.PAIR)
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self._task_socket.setsockopt(zmq.IDENTITY, self.session.session)
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self._task_socket.connect(content.task)
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if content.notification:
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self._notification_socket = self.context.socket(zmq.SUB)
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self._notification_socket.connect(content.notification)
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self._notification_socket.setsockopt(zmq.SUBSCRIBE, "")
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if content.query:
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self._query_socket = self.context.socket(zmq.PAIR)
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self._query_socket.setsockopt(zmq.IDENTITY, self.session.session)
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self._query_socket.connect(content.query)
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if content.control:
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self._control_socket = self.context.socket(zmq.PAIR)
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self._control_socket.setsockopt(zmq.IDENTITY, self.session.session)
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self._control_socket.connect(content.control)
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self._update_engines(dict(content.engines))
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else:
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self._connected = False
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raise Exception("Failed to connect!")
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#--------------------------------------------------------------------------
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# handlers and callbacks for incoming messages
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#--------------------------------------------------------------------------
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def _register_engine(self, msg):
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"""Register a new engine, and update our connection info."""
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content = msg['content']
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eid = content['id']
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d = {eid : content['queue']}
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self._update_engines(d)
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self._ids.add(int(eid))
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def _unregister_engine(self, msg):
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"""Unregister an engine that has died."""
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content = msg['content']
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eid = int(content['id'])
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if eid in self._ids:
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self._ids.remove(eid)
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self._engines.pop(eid)
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def _handle_execute_reply(self, msg):
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"""Save the reply to an execute_request into our results."""
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parent = msg['parent_header']
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msg_id = parent['msg_id']
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if msg_id not in self.outstanding:
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print("got unknown result: %s"%msg_id)
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else:
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self.outstanding.remove(msg_id)
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self.results[msg_id] = ss.unwrap_exception(msg['content'])
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def _handle_apply_reply(self, msg):
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"""Save the reply to an apply_request into our results."""
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parent = msg['parent_header']
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msg_id = parent['msg_id']
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if msg_id not in self.outstanding:
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print ("got unknown result: %s"%msg_id)
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else:
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self.outstanding.remove(msg_id)
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content = msg['content']
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if content['status'] == 'ok':
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self.results[msg_id] = ss.unserialize_object(msg['buffers'])
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elif content['status'] == 'aborted':
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self.results[msg_id] = AbortedTask(msg_id)
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elif content['status'] == 'resubmitted':
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pass # handle resubmission
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else:
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self.results[msg_id] = ss.unwrap_exception(content)
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def _flush_notifications(self):
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"""Flush notifications of engine registrations waiting
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in ZMQ queue."""
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msg = self.session.recv(self._notification_socket, mode=zmq.NOBLOCK)
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while msg is not None:
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if self.debug:
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pprint(msg)
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msg = msg[-1]
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msg_type = msg['msg_type']
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handler = self._notification_handlers.get(msg_type, None)
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if handler is None:
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raise Exception("Unhandled message type: %s"%msg.msg_type)
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else:
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handler(msg)
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msg = self.session.recv(self._notification_socket, mode=zmq.NOBLOCK)
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def _flush_results(self, sock):
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"""Flush task or queue results waiting in ZMQ queue."""
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msg = self.session.recv(sock, mode=zmq.NOBLOCK)
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while msg is not None:
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if self.debug:
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pprint(msg)
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msg = msg[-1]
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msg_type = msg['msg_type']
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handler = self._queue_handlers.get(msg_type, None)
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if handler is None:
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raise Exception("Unhandled message type: %s"%msg.msg_type)
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else:
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handler(msg)
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msg = self.session.recv(sock, mode=zmq.NOBLOCK)
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def _flush_control(self, sock):
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"""Flush replies from the control channel waiting
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in the ZMQ queue."""
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msg = self.session.recv(sock, mode=zmq.NOBLOCK)
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while msg is not None:
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if self.debug:
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pprint(msg)
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msg = self.session.recv(sock, mode=zmq.NOBLOCK)
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#--------------------------------------------------------------------------
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# getitem
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#--------------------------------------------------------------------------
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def __getitem__(self, key):
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"""Dict access returns DirectView multiplexer objects."""
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if isinstance(key, int):
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if key not in self.ids:
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raise IndexError("No such engine: %i"%key)
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return DirectView(self, key)
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if isinstance(key, slice):
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indices = range(len(self.ids))[key]
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ids = sorted(self._ids)
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key = [ ids[i] for i in indices ]
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# newkeys = sorted(self._ids)[thekeys[k]]
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if isinstance(key, (tuple, list, xrange)):
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_,targets = self._build_targets(list(key))
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return DirectView(self, targets)
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else:
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raise TypeError("key by int/iterable of ints only, not %s"%(type(key)))
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#--------------------------------------------------------------------------
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# Begin public methods
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#--------------------------------------------------------------------------
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def spin(self):
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"""Flush any registration notifications and execution results
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waiting in the ZMQ queue.
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"""
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if self._notification_socket:
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self._flush_notifications()
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if self._mux_socket:
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self._flush_results(self._mux_socket)
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if self._task_socket:
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self._flush_results(self._task_socket)
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if self._control_socket:
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self._flush_control(self._control_socket)
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def barrier(self, msg_ids=None, timeout=-1):
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"""waits on one or more `msg_ids`, for up to `timeout` seconds.
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Parameters
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----------
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msg_ids : int, str, or list of ints and/or strs
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ints are indices to self.history
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strs are msg_ids
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default: wait on all outstanding messages
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timeout : float
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a time in seconds, after which to give up.
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default is -1, which means no timeout
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Returns
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-------
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True : when all msg_ids are done
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False : timeout reached, some msg_ids still outstanding
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"""
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tic = time.time()
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if msg_ids is None:
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theids = self.outstanding
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else:
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if isinstance(msg_ids, (int, str)):
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msg_ids = [msg_ids]
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theids = set()
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for msg_id in msg_ids:
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if isinstance(msg_id, int):
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msg_id = self.history[msg_id]
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theids.add(msg_id)
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self.spin()
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while theids.intersection(self.outstanding):
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if timeout >= 0 and ( time.time()-tic ) > timeout:
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break
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time.sleep(1e-3)
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self.spin()
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return len(theids.intersection(self.outstanding)) == 0
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#--------------------------------------------------------------------------
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# Control methods
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#--------------------------------------------------------------------------
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@spinfirst
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@defaultblock
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def clear(self, targets=None, block=None):
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"""Clear the namespace in target(s)."""
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targets = self._build_targets(targets)[0]
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for t in targets:
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self.session.send(self._control_socket, 'clear_request', content={},ident=t)
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error = False
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if self.block:
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for i in range(len(targets)):
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idents,msg = self.session.recv(self._control_socket,0)
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if self.debug:
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pprint(msg)
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if msg['content']['status'] != 'ok':
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error = msg['content']
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if error:
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return error
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@spinfirst
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@defaultblock
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def abort(self, msg_ids = None, targets=None, block=None):
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"""Abort the execution queues of target(s)."""
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targets = self._build_targets(targets)[0]
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if isinstance(msg_ids, basestring):
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msg_ids = [msg_ids]
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content = dict(msg_ids=msg_ids)
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for t in targets:
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self.session.send(self._control_socket, 'abort_request',
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content=content, ident=t)
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error = False
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if self.block:
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for i in range(len(targets)):
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idents,msg = self.session.recv(self._control_socket,0)
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if self.debug:
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pprint(msg)
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if msg['content']['status'] != 'ok':
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error = msg['content']
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if error:
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return error
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@spinfirst
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@defaultblock
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def kill(self, targets=None, block=None):
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|
"""Terminates one or more engine processes."""
|
|
|
targets = self._build_targets(targets)[0]
|
|
|
for t in targets:
|
|
|
self.session.send(self._control_socket, 'kill_request', content={},ident=t)
|
|
|
error = False
|
|
|
if self.block:
|
|
|
for i in range(len(targets)):
|
|
|
idents,msg = self.session.recv(self._control_socket,0)
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
if msg['content']['status'] != 'ok':
|
|
|
error = msg['content']
|
|
|
if error:
|
|
|
return error
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Execution methods
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@defaultblock
|
|
|
def execute(self, code, targets='all', block=None):
|
|
|
"""Executes `code` on `targets` in blocking or nonblocking manner.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
code : str
|
|
|
the code string to be executed
|
|
|
targets : int/str/list of ints/strs
|
|
|
the engines on which to execute
|
|
|
default : all
|
|
|
block : bool
|
|
|
whether or not to wait until done to return
|
|
|
default: self.block
|
|
|
"""
|
|
|
# block = self.block if block is None else block
|
|
|
# saveblock = self.block
|
|
|
# self.block = block
|
|
|
result = self.apply(execute, (code,), targets=targets, block=block, bound=True)
|
|
|
# self.block = saveblock
|
|
|
return result
|
|
|
|
|
|
def run(self, code, block=None):
|
|
|
"""Runs `code` on an engine.
|
|
|
|
|
|
Calls to this are load-balanced.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
code : str
|
|
|
the code string to be executed
|
|
|
block : bool
|
|
|
whether or not to wait until done
|
|
|
|
|
|
"""
|
|
|
result = self.apply(execute, (code,), targets=None, block=block, bound=False)
|
|
|
return result
|
|
|
|
|
|
def apply(self, f, args=None, kwargs=None, bound=True, block=None, targets=None,
|
|
|
after=None, follow=None):
|
|
|
"""Call `f(*args, **kwargs)` on a remote engine(s), returning the result.
|
|
|
|
|
|
This is the central execution command for the client.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
f : function
|
|
|
The fuction to be called remotely
|
|
|
args : tuple/list
|
|
|
The positional arguments passed to `f`
|
|
|
kwargs : dict
|
|
|
The keyword arguments passed to `f`
|
|
|
bound : bool (default: True)
|
|
|
Whether to execute in the Engine(s) namespace, or in a clean
|
|
|
namespace not affecting the engine.
|
|
|
block : bool (default: self.block)
|
|
|
Whether to wait for the result, or return immediately.
|
|
|
False:
|
|
|
returns msg_id(s)
|
|
|
if multiple targets:
|
|
|
list of ids
|
|
|
True:
|
|
|
returns actual result(s) of f(*args, **kwargs)
|
|
|
if multiple targets:
|
|
|
dict of results, by engine ID
|
|
|
targets : int,list of ints, 'all', None
|
|
|
Specify the destination of the job.
|
|
|
if None:
|
|
|
Submit via Task queue for load-balancing.
|
|
|
if 'all':
|
|
|
Run on all active engines
|
|
|
if list:
|
|
|
Run on each specified engine
|
|
|
if int:
|
|
|
Run on single engine
|
|
|
|
|
|
after : Dependency or collection of msg_ids
|
|
|
Only for load-balanced execution (targets=None)
|
|
|
Specify a list of msg_ids as a time-based dependency.
|
|
|
This job will only be run *after* the dependencies
|
|
|
have been met.
|
|
|
|
|
|
follow : Dependency or collection of msg_ids
|
|
|
Only for load-balanced execution (targets=None)
|
|
|
Specify a list of msg_ids as a location-based dependency.
|
|
|
This job will only be run on an engine where this dependency
|
|
|
is met.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
if block is False:
|
|
|
if single target:
|
|
|
return msg_id
|
|
|
else:
|
|
|
return list of msg_ids
|
|
|
? (should this be dict like block=True) ?
|
|
|
else:
|
|
|
if single target:
|
|
|
return result of f(*args, **kwargs)
|
|
|
else:
|
|
|
return dict of results, keyed by engine
|
|
|
"""
|
|
|
|
|
|
# defaults:
|
|
|
block = block if block is not None else self.block
|
|
|
args = args if args is not None else []
|
|
|
kwargs = kwargs if kwargs is not None else {}
|
|
|
|
|
|
# enforce types of f,args,kwrags
|
|
|
if not callable(f):
|
|
|
raise TypeError("f must be callable, not %s"%type(f))
|
|
|
if not isinstance(args, (tuple, list)):
|
|
|
raise TypeError("args must be tuple or list, not %s"%type(args))
|
|
|
if not isinstance(kwargs, dict):
|
|
|
raise TypeError("kwargs must be dict, not %s"%type(kwargs))
|
|
|
|
|
|
options = dict(bound=bound, block=block, after=after, follow=follow)
|
|
|
|
|
|
if targets is None:
|
|
|
return self._apply_balanced(f, args, kwargs, **options)
|
|
|
else:
|
|
|
return self._apply_direct(f, args, kwargs, targets=targets, **options)
|
|
|
|
|
|
def _apply_balanced(self, f, args, kwargs, bound=True, block=None,
|
|
|
after=None, follow=None):
|
|
|
"""The underlying method for applying functions in a load balanced
|
|
|
manner, via the task queue."""
|
|
|
if isinstance(after, Dependency):
|
|
|
after = after.as_dict()
|
|
|
elif after is None:
|
|
|
after = []
|
|
|
if isinstance(follow, Dependency):
|
|
|
follow = follow.as_dict()
|
|
|
elif follow is None:
|
|
|
follow = []
|
|
|
subheader = dict(after=after, follow=follow)
|
|
|
|
|
|
bufs = ss.pack_apply_message(f,args,kwargs)
|
|
|
content = dict(bound=bound)
|
|
|
msg = self.session.send(self._task_socket, "apply_request",
|
|
|
content=content, buffers=bufs, subheader=subheader)
|
|
|
msg_id = msg['msg_id']
|
|
|
self.outstanding.add(msg_id)
|
|
|
self.history.append(msg_id)
|
|
|
if block:
|
|
|
self.barrier(msg_id)
|
|
|
return self.results[msg_id]
|
|
|
else:
|
|
|
return msg_id
|
|
|
|
|
|
def _apply_direct(self, f, args, kwargs, bound=True, block=None, targets=None,
|
|
|
after=None, follow=None):
|
|
|
"""Then underlying method for applying functions to specific engines
|
|
|
via the MUX queue."""
|
|
|
|
|
|
queues,targets = self._build_targets(targets)
|
|
|
bufs = ss.pack_apply_message(f,args,kwargs)
|
|
|
if isinstance(after, Dependency):
|
|
|
after = after.as_dict()
|
|
|
elif after is None:
|
|
|
after = []
|
|
|
if isinstance(follow, Dependency):
|
|
|
follow = follow.as_dict()
|
|
|
elif follow is None:
|
|
|
follow = []
|
|
|
subheader = dict(after=after, follow=follow)
|
|
|
content = dict(bound=bound)
|
|
|
msg_ids = []
|
|
|
for queue in queues:
|
|
|
msg = self.session.send(self._mux_socket, "apply_request",
|
|
|
content=content, buffers=bufs,ident=queue, subheader=subheader)
|
|
|
msg_id = msg['msg_id']
|
|
|
self.outstanding.add(msg_id)
|
|
|
self.history.append(msg_id)
|
|
|
msg_ids.append(msg_id)
|
|
|
if block:
|
|
|
self.barrier(msg_ids)
|
|
|
else:
|
|
|
if len(msg_ids) == 1:
|
|
|
return msg_ids[0]
|
|
|
else:
|
|
|
return msg_ids
|
|
|
if len(msg_ids) == 1:
|
|
|
return self.results[msg_ids[0]]
|
|
|
else:
|
|
|
result = {}
|
|
|
for target,mid in zip(targets, msg_ids):
|
|
|
result[target] = self.results[mid]
|
|
|
return result
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Data movement
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@defaultblock
|
|
|
def push(self, ns, targets=None, block=None):
|
|
|
"""Push the contents of `ns` into the namespace on `target`"""
|
|
|
if not isinstance(ns, dict):
|
|
|
raise TypeError("Must be a dict, not %s"%type(ns))
|
|
|
result = self.apply(_push, (ns,), targets=targets, block=block, bound=True)
|
|
|
return result
|
|
|
|
|
|
@defaultblock
|
|
|
def pull(self, keys, targets=None, block=True):
|
|
|
"""Pull objects from `target`'s namespace by `keys`"""
|
|
|
if isinstance(keys, str):
|
|
|
pass
|
|
|
elif isistance(keys, (list,tuple,set)):
|
|
|
for key in keys:
|
|
|
if not isinstance(key, str):
|
|
|
raise TypeError
|
|
|
result = self.apply(_pull, (keys,), targets=targets, block=block, bound=True)
|
|
|
return result
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Query methods
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@spinfirst
|
|
|
def get_results(self, msg_ids, status_only=False):
|
|
|
"""Returns the result of the execute or task request with `msg_ids`.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
msg_ids : list of ints or msg_ids
|
|
|
if int:
|
|
|
Passed as index to self.history for convenience.
|
|
|
status_only : bool (default: False)
|
|
|
if False:
|
|
|
return the actual results
|
|
|
"""
|
|
|
if not isinstance(msg_ids, (list,tuple)):
|
|
|
msg_ids = [msg_ids]
|
|
|
theids = []
|
|
|
for msg_id in msg_ids:
|
|
|
if isinstance(msg_id, int):
|
|
|
msg_id = self.history[msg_id]
|
|
|
if not isinstance(msg_id, str):
|
|
|
raise TypeError("msg_ids must be str, not %r"%msg_id)
|
|
|
theids.append(msg_id)
|
|
|
|
|
|
completed = []
|
|
|
local_results = {}
|
|
|
for msg_id in list(theids):
|
|
|
if msg_id in self.results:
|
|
|
completed.append(msg_id)
|
|
|
local_results[msg_id] = self.results[msg_id]
|
|
|
theids.remove(msg_id)
|
|
|
|
|
|
if msg_ids: # some not locally cached
|
|
|
content = dict(msg_ids=theids, status_only=status_only)
|
|
|
msg = self.session.send(self._query_socket, "result_request", content=content)
|
|
|
zmq.select([self._query_socket], [], [])
|
|
|
idents,msg = self.session.recv(self._query_socket, zmq.NOBLOCK)
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
content = msg['content']
|
|
|
if content['status'] != 'ok':
|
|
|
raise ss.unwrap_exception(content)
|
|
|
else:
|
|
|
content = dict(completed=[],pending=[])
|
|
|
if not status_only:
|
|
|
# load cached results into result:
|
|
|
content['completed'].extend(completed)
|
|
|
content.update(local_results)
|
|
|
# update cache with results:
|
|
|
for msg_id in msg_ids:
|
|
|
if msg_id in content['completed']:
|
|
|
self.results[msg_id] = content[msg_id]
|
|
|
return content
|
|
|
|
|
|
@spinfirst
|
|
|
def queue_status(self, targets=None, verbose=False):
|
|
|
"""Fetch the status of engine queues.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
targets : int/str/list of ints/strs
|
|
|
the engines on which to execute
|
|
|
default : all
|
|
|
verbose : bool
|
|
|
whether to return lengths only, or lists of ids for each element
|
|
|
"""
|
|
|
targets = self._build_targets(targets)[1]
|
|
|
content = dict(targets=targets, verbose=verbose)
|
|
|
self.session.send(self._query_socket, "queue_request", content=content)
|
|
|
idents,msg = self.session.recv(self._query_socket, 0)
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
content = msg['content']
|
|
|
status = content.pop('status')
|
|
|
if status != 'ok':
|
|
|
raise ss.unwrap_exception(content)
|
|
|
return content
|
|
|
|
|
|
@spinfirst
|
|
|
def purge_results(self, msg_ids=[], targets=[]):
|
|
|
"""Tell the controller to forget results.
|
|
|
|
|
|
Individual results can be purged by msg_id, or the entire
|
|
|
history of specific targets can
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
targets : int/str/list of ints/strs
|
|
|
the targets
|
|
|
default : None
|
|
|
"""
|
|
|
if not targets and not msg_ids:
|
|
|
raise ValueError
|
|
|
if targets:
|
|
|
targets = self._build_targets(targets)[1]
|
|
|
content = dict(targets=targets, msg_ids=msg_ids)
|
|
|
self.session.send(self._query_socket, "purge_request", content=content)
|
|
|
idents, msg = self.session.recv(self._query_socket, 0)
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
content = msg['content']
|
|
|
if content['status'] != 'ok':
|
|
|
raise ss.unwrap_exception(content)
|
|
|
|
|
|
class AsynClient(Client):
|
|
|
"""An Asynchronous client, using the Tornado Event Loop.
|
|
|
!!!unfinished!!!"""
|
|
|
io_loop = None
|
|
|
_queue_stream = None
|
|
|
_notifier_stream = None
|
|
|
_task_stream = None
|
|
|
_control_stream = None
|
|
|
|
|
|
def __init__(self, addr, context=None, username=None, debug=False, io_loop=None):
|
|
|
Client.__init__(self, addr, context, username, debug)
|
|
|
if io_loop is None:
|
|
|
io_loop = ioloop.IOLoop.instance()
|
|
|
self.io_loop = io_loop
|
|
|
|
|
|
self._queue_stream = zmqstream.ZMQStream(self._mux_socket, io_loop)
|
|
|
self._control_stream = zmqstream.ZMQStream(self._control_socket, io_loop)
|
|
|
self._task_stream = zmqstream.ZMQStream(self._task_socket, io_loop)
|
|
|
self._notification_stream = zmqstream.ZMQStream(self._notification_socket, io_loop)
|
|
|
|
|
|
def spin(self):
|
|
|
for stream in (self.queue_stream, self.notifier_stream,
|
|
|
self.task_stream, self.control_stream):
|
|
|
stream.flush()
|
|
|
|
