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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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import os
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import time
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from getpass import getpass
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from pprint import pprint
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from datetime import datetime
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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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from IPython.zmq import tunnel
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import streamsession as ss
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# from remotenamespace import RemoteNamespace
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from view import DirectView, LoadBalancedView
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from dependency import Dependency, depend, require
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import error
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import map as Map
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from asyncresult import AsyncResult, AsyncMapResult
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from remotefunction import remote,parallel,ParallelFunction,RemoteFunction
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from util import ReverseDict
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#--------------------------------------------------------------------------
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# helpers for implementing old MEC API via client.apply
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#--------------------------------------------------------------------------
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def _push(ns):
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"""helper method for implementing `client.push` via `client.apply`"""
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globals().update(ns)
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def _pull(keys):
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"""helper method for implementing `client.pull` via `client.apply`"""
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g = globals()
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if isinstance(keys, (list,tuple, set)):
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for key in keys:
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if not g.has_key(key):
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raise NameError("name '%s' is not defined"%key)
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return map(g.get, keys)
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else:
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if not g.has_key(keys):
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raise NameError("name '%s' is not defined"%keys)
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return g.get(keys)
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def _clear():
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"""helper method for implementing `client.clear` via `client.apply`"""
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globals().clear()
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def _execute(code):
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"""helper method for implementing `client.execute` via `client.apply`"""
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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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try:
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ret = f(self, *args, **kwargs)
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finally:
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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 Metadata(dict):
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"""Subclass of dict for initializing metadata values.
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Attribute access works on keys.
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These objects have a strict set of keys - errors will raise if you try
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to add new keys.
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"""
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def __init__(self, *args, **kwargs):
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dict.__init__(self)
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md = {'msg_id' : None,
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'submitted' : None,
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'started' : None,
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'completed' : None,
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'received' : None,
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'engine_uuid' : None,
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'engine_id' : None,
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'follow' : None,
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'after' : None,
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'status' : 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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self.update(md)
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self.update(dict(*args, **kwargs))
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def __getattr__(self, key):
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"""getattr aliased to getitem"""
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if key in self.iterkeys():
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return self[key]
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else:
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raise AttributeError(key)
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def __setattr__(self, key, value):
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"""setattr aliased to setitem, with strict"""
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if key in self.iterkeys():
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self[key] = value
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else:
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raise AttributeError(key)
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def __setitem__(self, key, value):
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"""strict static key enforcement"""
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if key in self.iterkeys():
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dict.__setitem__(self, key, value)
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else:
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raise KeyError(key)
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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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[Default: 'tcp://127.0.0.1:10101']
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context : zmq.Context
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Pass an existing zmq.Context instance, otherwise the client will create its own
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username : bytes
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set username to be passed to the Session object
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debug : bool
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flag for lots of message printing for debug purposes
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#-------------- ssh related args ----------------
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# These are args for configuring the ssh tunnel to be used
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# credentials are used to forward connections over ssh to the Controller
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# Note that the ip given in `addr` needs to be relative to sshserver
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# The most basic case is to leave addr as pointing to localhost (127.0.0.1),
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# and set sshserver as the same machine the Controller is on. However,
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# the only requirement is that sshserver is able to see the Controller
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# (i.e. is within the same trusted network).
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sshserver : str
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A string of the form passed to ssh, i.e. 'server.tld' or 'user@server.tld:port'
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If keyfile or password is specified, and this is not, it will default to
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the ip given in addr.
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sshkey : str; path to public ssh key file
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This specifies a key to be used in ssh login, default None.
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Regular default ssh keys will be used without specifying this argument.
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password : str;
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Your ssh password to sshserver. Note that if this is left None,
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you will be prompted for it if passwordless key based login is unavailable.
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#------- exec authentication args -------
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# If even localhost is untrusted, you can have some protection against
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# unauthorized execution by using a key. Messages are still sent
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# as cleartext, so if someone can snoop your loopback traffic this will
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# not help anything.
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exec_key : str
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an authentication key or file containing a key
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default: None
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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 attributes.
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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/apply_bound
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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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_ssh=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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_iopub_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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targets = None
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def __init__(self, addr='tcp://127.0.0.1:10101', context=None, username=None, debug=False,
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sshserver=None, sshkey=None, password=None, paramiko=None,
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exec_key=None,):
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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.targets = 'all'
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self._addr = addr
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self._ssh = bool(sshserver or sshkey or password)
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if self._ssh and sshserver is None:
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# default to the same
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sshserver = addr.split('://')[1].split(':')[0]
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if self._ssh and password is None:
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if tunnel.try_passwordless_ssh(sshserver, sshkey, paramiko):
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password=False
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else:
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password = getpass("SSH Password for %s: "%sshserver)
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ssh_kwargs = dict(keyfile=sshkey, password=password, paramiko=paramiko)
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if exec_key is not None and os.path.isfile(exec_key):
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arg = 'keyfile'
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else:
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arg = 'key'
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key_arg = {arg:exec_key}
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if username is None:
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self.session = ss.StreamSession(**key_arg)
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else:
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self.session = ss.StreamSession(username, **key_arg)
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self._registration_socket = self.context.socket(zmq.XREQ)
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self._registration_socket.setsockopt(zmq.IDENTITY, self.session.session)
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if self._ssh:
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tunnel.tunnel_connection(self._registration_socket, addr, sshserver, **ssh_kwargs)
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else:
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self._registration_socket.connect(addr)
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self._engines = ReverseDict()
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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.metadata = {}
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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(sshserver, ssh_kwargs)
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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, sshserver, ssh_kwargs):
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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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def connect_socket(s, addr):
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if self._ssh:
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return tunnel.tunnel_connection(s, addr, sshserver, **ssh_kwargs)
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else:
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return s.connect(addr)
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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.mux:
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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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connect_socket(self._mux_socket, content.mux)
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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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connect_socket(self._task_socket, 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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connect_socket(self._notification_socket, 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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connect_socket(self._query_socket, 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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connect_socket(self._control_socket, content.control)
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if content.iopub:
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self._iopub_socket = self.context.socket(zmq.SUB)
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self._iopub_socket.setsockopt(zmq.SUBSCRIBE, '')
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self._iopub_socket.setsockopt(zmq.IDENTITY, self.session.session)
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connect_socket(self._iopub_socket, content.iopub)
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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 _extract_metadata(self, header, parent, content):
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md = {'msg_id' : parent['msg_id'],
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'received' : datetime.now(),
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'engine_uuid' : header.get('engine', None),
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'follow' : parent['follow'],
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'after' : parent['after'],
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'status' : content['status'],
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}
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if md['engine_uuid'] is not None:
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md['engine_id'] = self._engines.get(md['engine_uuid'], None)
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if 'date' in parent:
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md['submitted'] = datetime.strptime(parent['date'], ss.ISO8601)
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if 'started' in header:
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md['started'] = datetime.strptime(header['started'], ss.ISO8601)
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if 'date' in header:
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md['completed'] = datetime.strptime(header['date'], ss.ISO8601)
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return md
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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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execute messages are never actually used. apply is used instead.
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"""
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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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if msg_id in self.history:
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print ("got stale result: %s"%msg_id)
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else:
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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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if msg_id in self.history:
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print ("got stale result: %s"%msg_id)
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print self.results[msg_id]
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|
print msg
|
|
|
else:
|
|
|
print ("got unknown result: %s"%msg_id)
|
|
|
else:
|
|
|
self.outstanding.remove(msg_id)
|
|
|
content = msg['content']
|
|
|
header = msg['header']
|
|
|
|
|
|
# construct metadata:
|
|
|
md = self.metadata.setdefault(msg_id, Metadata())
|
|
|
md.update(self._extract_metadata(header, parent, content))
|
|
|
self.metadata[msg_id] = md
|
|
|
|
|
|
# construct result:
|
|
|
if content['status'] == 'ok':
|
|
|
self.results[msg_id] = ss.unserialize_object(msg['buffers'])[0]
|
|
|
elif content['status'] == 'aborted':
|
|
|
self.results[msg_id] = error.AbortedTask(msg_id)
|
|
|
elif content['status'] == 'resubmitted':
|
|
|
# TODO: handle resubmission
|
|
|
pass
|
|
|
else:
|
|
|
e = ss.unwrap_exception(content)
|
|
|
if e.engine_info:
|
|
|
e_uuid = e.engine_info['engineid']
|
|
|
eid = self._engines[e_uuid]
|
|
|
e.engine_info['engineid'] = eid
|
|
|
self.results[msg_id] = e
|
|
|
|
|
|
def _flush_notifications(self):
|
|
|
"""Flush notifications of engine registrations waiting
|
|
|
in ZMQ queue."""
|
|
|
msg = self.session.recv(self._notification_socket, mode=zmq.NOBLOCK)
|
|
|
while msg is not None:
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
msg = msg[-1]
|
|
|
msg_type = msg['msg_type']
|
|
|
handler = self._notification_handlers.get(msg_type, None)
|
|
|
if handler is None:
|
|
|
raise Exception("Unhandled message type: %s"%msg.msg_type)
|
|
|
else:
|
|
|
handler(msg)
|
|
|
msg = self.session.recv(self._notification_socket, mode=zmq.NOBLOCK)
|
|
|
|
|
|
def _flush_results(self, sock):
|
|
|
"""Flush task or queue results waiting in ZMQ queue."""
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
while msg is not None:
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
msg = msg[-1]
|
|
|
msg_type = msg['msg_type']
|
|
|
handler = self._queue_handlers.get(msg_type, None)
|
|
|
if handler is None:
|
|
|
raise Exception("Unhandled message type: %s"%msg.msg_type)
|
|
|
else:
|
|
|
handler(msg)
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
|
|
|
def _flush_control(self, sock):
|
|
|
"""Flush replies from the control channel waiting
|
|
|
in the ZMQ queue.
|
|
|
|
|
|
Currently: ignore them."""
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
while msg is not None:
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
|
|
|
def _flush_iopub(self, sock):
|
|
|
"""Flush replies from the iopub channel waiting
|
|
|
in the ZMQ queue.
|
|
|
"""
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
while msg is not None:
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
msg = msg[-1]
|
|
|
parent = msg['parent_header']
|
|
|
msg_id = parent['msg_id']
|
|
|
content = msg['content']
|
|
|
header = msg['header']
|
|
|
msg_type = msg['msg_type']
|
|
|
|
|
|
# init metadata:
|
|
|
md = self.metadata.setdefault(msg_id, Metadata())
|
|
|
|
|
|
if msg_type == 'stream':
|
|
|
name = content['name']
|
|
|
s = md[name] or ''
|
|
|
md[name] = s + content['data']
|
|
|
elif msg_type == 'pyerr':
|
|
|
md.update({'pyerr' : ss.unwrap_exception(content)})
|
|
|
else:
|
|
|
md.update({msg_type : content['data']})
|
|
|
|
|
|
self.metadata[msg_id] = md
|
|
|
|
|
|
msg = self.session.recv(sock, mode=zmq.NOBLOCK)
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# getitem
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def __getitem__(self, key):
|
|
|
"""Dict access returns DirectView multiplexer objects or,
|
|
|
if key is None, a LoadBalancedView."""
|
|
|
if key is None:
|
|
|
return LoadBalancedView(self)
|
|
|
if isinstance(key, int):
|
|
|
if key not in self.ids:
|
|
|
raise IndexError("No such engine: %i"%key)
|
|
|
return DirectView(self, key)
|
|
|
|
|
|
if isinstance(key, slice):
|
|
|
indices = range(len(self.ids))[key]
|
|
|
ids = sorted(self._ids)
|
|
|
key = [ ids[i] for i in indices ]
|
|
|
# newkeys = sorted(self._ids)[thekeys[k]]
|
|
|
|
|
|
if isinstance(key, (tuple, list, xrange)):
|
|
|
_,targets = self._build_targets(list(key))
|
|
|
return DirectView(self, targets)
|
|
|
else:
|
|
|
raise TypeError("key by int/iterable of ints only, not %s"%(type(key)))
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Begin public methods
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@property
|
|
|
def remote(self):
|
|
|
"""property for convenient RemoteFunction generation.
|
|
|
|
|
|
>>> @client.remote
|
|
|
... def f():
|
|
|
import os
|
|
|
print (os.getpid())
|
|
|
"""
|
|
|
return remote(self, block=self.block)
|
|
|
|
|
|
def spin(self):
|
|
|
"""Flush any registration notifications and execution results
|
|
|
waiting in the ZMQ queue.
|
|
|
"""
|
|
|
if self._notification_socket:
|
|
|
self._flush_notifications()
|
|
|
if self._mux_socket:
|
|
|
self._flush_results(self._mux_socket)
|
|
|
if self._task_socket:
|
|
|
self._flush_results(self._task_socket)
|
|
|
if self._control_socket:
|
|
|
self._flush_control(self._control_socket)
|
|
|
if self._iopub_socket:
|
|
|
self._flush_iopub(self._iopub_socket)
|
|
|
|
|
|
def barrier(self, msg_ids=None, timeout=-1):
|
|
|
"""waits on one or more `msg_ids`, for up to `timeout` seconds.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
msg_ids : int, str, or list of ints and/or strs, or one or more AsyncResult objects
|
|
|
ints are indices to self.history
|
|
|
strs are msg_ids
|
|
|
default: wait on all outstanding messages
|
|
|
timeout : float
|
|
|
a time in seconds, after which to give up.
|
|
|
default is -1, which means no timeout
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
True : when all msg_ids are done
|
|
|
False : timeout reached, some msg_ids still outstanding
|
|
|
"""
|
|
|
tic = time.time()
|
|
|
if msg_ids is None:
|
|
|
theids = self.outstanding
|
|
|
else:
|
|
|
if isinstance(msg_ids, (int, str, AsyncResult)):
|
|
|
msg_ids = [msg_ids]
|
|
|
theids = set()
|
|
|
for msg_id in msg_ids:
|
|
|
if isinstance(msg_id, int):
|
|
|
msg_id = self.history[msg_id]
|
|
|
elif isinstance(msg_id, AsyncResult):
|
|
|
map(theids.add, msg_id.msg_ids)
|
|
|
continue
|
|
|
theids.add(msg_id)
|
|
|
if not theids.intersection(self.outstanding):
|
|
|
return True
|
|
|
self.spin()
|
|
|
while theids.intersection(self.outstanding):
|
|
|
if timeout >= 0 and ( time.time()-tic ) > timeout:
|
|
|
break
|
|
|
time.sleep(1e-3)
|
|
|
self.spin()
|
|
|
return len(theids.intersection(self.outstanding)) == 0
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Control methods
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@spinfirst
|
|
|
@defaultblock
|
|
|
def clear(self, targets=None, block=None):
|
|
|
"""Clear the namespace in target(s)."""
|
|
|
targets = self._build_targets(targets)[0]
|
|
|
for t in targets:
|
|
|
self.session.send(self._control_socket, 'clear_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 = ss.unwrap_exception(msg['content'])
|
|
|
if error:
|
|
|
return error
|
|
|
|
|
|
|
|
|
@spinfirst
|
|
|
@defaultblock
|
|
|
def abort(self, msg_ids = None, targets=None, block=None):
|
|
|
"""Abort the execution queues of target(s)."""
|
|
|
targets = self._build_targets(targets)[0]
|
|
|
if isinstance(msg_ids, basestring):
|
|
|
msg_ids = [msg_ids]
|
|
|
content = dict(msg_ids=msg_ids)
|
|
|
for t in targets:
|
|
|
self.session.send(self._control_socket, 'abort_request',
|
|
|
content=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 = ss.unwrap_exception(msg['content'])
|
|
|
if error:
|
|
|
return error
|
|
|
|
|
|
@spinfirst
|
|
|
@defaultblock
|
|
|
def shutdown(self, targets=None, restart=False, controller=False, block=None):
|
|
|
"""Terminates one or more engine processes, optionally including the controller."""
|
|
|
if controller:
|
|
|
targets = 'all'
|
|
|
targets = self._build_targets(targets)[0]
|
|
|
for t in targets:
|
|
|
self.session.send(self._control_socket, 'shutdown_request',
|
|
|
content={'restart':restart},ident=t)
|
|
|
error = False
|
|
|
if block or controller:
|
|
|
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 = ss.unwrap_exception(msg['content'])
|
|
|
|
|
|
if controller:
|
|
|
time.sleep(0.25)
|
|
|
self.session.send(self._query_socket, 'shutdown_request')
|
|
|
idents,msg = self.session.recv(self._query_socket, 0)
|
|
|
if self.debug:
|
|
|
pprint(msg)
|
|
|
if msg['content']['status'] != 'ok':
|
|
|
error = ss.unwrap_exception(msg['content'])
|
|
|
|
|
|
if error:
|
|
|
raise error
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Execution methods
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@defaultblock
|
|
|
def execute(self, code, targets='all', block=None):
|
|
|
"""Executes `code` on `targets` in blocking or nonblocking manner.
|
|
|
|
|
|
``execute`` is always `bound` (affects engine namespace)
|
|
|
|
|
|
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
|
|
|
"""
|
|
|
result = self.apply(_execute, (code,), targets=targets, block=self.block, bound=True)
|
|
|
return result
|
|
|
|
|
|
def run(self, code, block=None):
|
|
|
"""Runs `code` on an engine.
|
|
|
|
|
|
Calls to this are load-balanced.
|
|
|
|
|
|
``run`` is never `bound` (no effect on engine namespace)
|
|
|
|
|
|
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 _maybe_raise(self, result):
|
|
|
"""wrapper for maybe raising an exception if apply failed."""
|
|
|
if isinstance(result, error.RemoteError):
|
|
|
raise result
|
|
|
|
|
|
return result
|
|
|
|
|
|
def _build_dependency(self, dep):
|
|
|
"""helper for building jsonable dependencies from various input forms"""
|
|
|
if isinstance(dep, Dependency):
|
|
|
return dep.as_dict()
|
|
|
elif isinstance(dep, AsyncResult):
|
|
|
return dep.msg_ids
|
|
|
elif dep is None:
|
|
|
return []
|
|
|
elif isinstance(dep, set):
|
|
|
return list(dep)
|
|
|
elif isinstance(dep, (list,dict)):
|
|
|
return dep
|
|
|
elif isinstance(dep, str):
|
|
|
return [dep]
|
|
|
else:
|
|
|
raise TypeError("Dependency may be: set,list,dict,Dependency or AsyncResult, not %r"%type(dep))
|
|
|
|
|
|
def apply(self, f, args=None, kwargs=None, bound=True, block=None, targets=None,
|
|
|
after=None, follow=None, timeout=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.
|
|
|
|
|
|
timeout : float or None
|
|
|
Only for load-balanced execution (targets=None)
|
|
|
Specify an amount of time (in seconds)
|
|
|
|
|
|
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))
|
|
|
|
|
|
after = self._build_dependency(after)
|
|
|
follow = self._build_dependency(follow)
|
|
|
|
|
|
options = dict(bound=bound, block=block)
|
|
|
|
|
|
if targets is None:
|
|
|
return self._apply_balanced(f, args, kwargs, timeout=timeout,
|
|
|
after=after, follow=follow, **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, timeout=None):
|
|
|
"""The underlying method for applying functions in a load balanced
|
|
|
manner, via the task queue."""
|
|
|
subheader = dict(after=after, follow=follow, timeout=timeout)
|
|
|
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)
|
|
|
ar = AsyncResult(self, [msg_id], fname=f.__name__)
|
|
|
if block:
|
|
|
return ar.get()
|
|
|
else:
|
|
|
return ar
|
|
|
|
|
|
def _apply_direct(self, f, args, kwargs, bound=True, block=None, targets=None):
|
|
|
"""Then underlying method for applying functions to specific engines
|
|
|
via the MUX queue."""
|
|
|
|
|
|
queues,targets = self._build_targets(targets)
|
|
|
|
|
|
subheader = dict(after=after, follow=follow)
|
|
|
content = dict(bound=bound)
|
|
|
bufs = ss.pack_apply_message(f,args,kwargs)
|
|
|
|
|
|
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)
|
|
|
ar = AsyncResult(self, msg_ids, fname=f.__name__)
|
|
|
if block:
|
|
|
return ar.get()
|
|
|
else:
|
|
|
return ar
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Map and decorators
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def map(self, f, *sequences):
|
|
|
"""Parallel version of builtin `map`, using all our engines."""
|
|
|
pf = ParallelFunction(self, f, block=self.block,
|
|
|
bound=True, targets='all')
|
|
|
return pf.map(*sequences)
|
|
|
|
|
|
def parallel(self, bound=True, targets='all', block=True):
|
|
|
"""Decorator for making a ParallelFunction."""
|
|
|
return parallel(self, bound=bound, targets=targets, block=block)
|
|
|
|
|
|
def remote(self, bound=True, targets='all', block=True):
|
|
|
"""Decorator for making a RemoteFunction."""
|
|
|
return remote(self, bound=bound, targets=targets, block=block)
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# Data movement
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
@defaultblock
|
|
|
def push(self, ns, targets='all', 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='all', block=None):
|
|
|
"""Pull objects from `target`'s namespace by `keys`"""
|
|
|
if isinstance(keys, str):
|
|
|
pass
|
|
|
elif isinstance(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
|
|
|
|
|
|
def scatter(self, key, seq, dist='b', flatten=False, targets='all', block=None):
|
|
|
"""
|
|
|
Partition a Python sequence and send the partitions to a set of engines.
|
|
|
"""
|
|
|
block = block if block is not None else self.block
|
|
|
targets = self._build_targets(targets)[-1]
|
|
|
mapObject = Map.dists[dist]()
|
|
|
nparts = len(targets)
|
|
|
msg_ids = []
|
|
|
for index, engineid in enumerate(targets):
|
|
|
partition = mapObject.getPartition(seq, index, nparts)
|
|
|
if flatten and len(partition) == 1:
|
|
|
r = self.push({key: partition[0]}, targets=engineid, block=False)
|
|
|
else:
|
|
|
r = self.push({key: partition}, targets=engineid, block=False)
|
|
|
msg_ids.extend(r.msg_ids)
|
|
|
r = AsyncResult(self, msg_ids, fname='scatter')
|
|
|
if block:
|
|
|
return r.get()
|
|
|
else:
|
|
|
return r
|
|
|
|
|
|
def gather(self, key, dist='b', targets='all', block=None):
|
|
|
"""
|
|
|
Gather a partitioned sequence on a set of engines as a single local seq.
|
|
|
"""
|
|
|
block = block if block is not None else self.block
|
|
|
|
|
|
targets = self._build_targets(targets)[-1]
|
|
|
mapObject = Map.dists[dist]()
|
|
|
msg_ids = []
|
|
|
for index, engineid in enumerate(targets):
|
|
|
msg_ids.extend(self.pull(key, targets=engineid,block=False).msg_ids)
|
|
|
|
|
|
r = AsyncMapResult(self, msg_ids, mapObject, fname='gather')
|
|
|
if block:
|
|
|
return r.get()
|
|
|
else:
|
|
|
return r
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# 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
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
|
|
|
results : dict
|
|
|
There will always be the keys 'pending' and 'completed', which will
|
|
|
be lists of msg_ids.
|
|
|
"""
|
|
|
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 = {}
|
|
|
# temporarily disable local shortcut
|
|
|
# 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 theids: # 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)
|
|
|
buffers = msg['buffers']
|
|
|
else:
|
|
|
content = dict(completed=[],pending=[])
|
|
|
|
|
|
content['completed'].extend(completed)
|
|
|
|
|
|
if status_only:
|
|
|
return content
|
|
|
|
|
|
failures = []
|
|
|
# load cached results into result:
|
|
|
content.update(local_results)
|
|
|
# update cache with results:
|
|
|
for msg_id in sorted(theids):
|
|
|
if msg_id in content['completed']:
|
|
|
rec = content[msg_id]
|
|
|
parent = rec['header']
|
|
|
header = rec['result_header']
|
|
|
rcontent = rec['result_content']
|
|
|
iodict = rec['io']
|
|
|
if isinstance(rcontent, str):
|
|
|
rcontent = self.session.unpack(rcontent)
|
|
|
|
|
|
md = self.metadata.setdefault(msg_id, Metadata())
|
|
|
md.update(self._extract_metadata(header, parent, rcontent))
|
|
|
md.update(iodict)
|
|
|
|
|
|
if rcontent['status'] == 'ok':
|
|
|
res,buffers = ss.unserialize_object(buffers)
|
|
|
else:
|
|
|
res = ss.unwrap_exception(rcontent)
|
|
|
failures.append(res)
|
|
|
|
|
|
self.results[msg_id] = res
|
|
|
content[msg_id] = res
|
|
|
|
|
|
error.collect_exceptions(failures, "get_results")
|
|
|
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 ss.rekey(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 be purged.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
msg_ids : str or list of strs
|
|
|
the msg_ids whose results should be forgotten.
|
|
|
targets : int/str/list of ints/strs
|
|
|
The targets, by uuid or int_id, whose entire history is to be purged.
|
|
|
Use `targets='all'` to scrub everything from the controller's memory.
|
|
|
|
|
|
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)
|
|
|
|
|
|
#----------------------------------------
|
|
|
# activate for %px,%autopx magics
|
|
|
#----------------------------------------
|
|
|
def activate(self):
|
|
|
"""Make this `View` active for parallel magic commands.
|
|
|
|
|
|
IPython has a magic command syntax to work with `MultiEngineClient` objects.
|
|
|
In a given IPython session there is a single active one. While
|
|
|
there can be many `Views` created and used by the user,
|
|
|
there is only one active one. The active `View` is used whenever
|
|
|
the magic commands %px and %autopx are used.
|
|
|
|
|
|
The activate() method is called on a given `View` to make it
|
|
|
active. Once this has been done, the magic commands can be used.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
# This is injected into __builtins__.
|
|
|
ip = get_ipython()
|
|
|
except NameError:
|
|
|
print "The IPython parallel magics (%result, %px, %autopx) only work within IPython."
|
|
|
else:
|
|
|
pmagic = ip.plugin_manager.get_plugin('parallelmagic')
|
|
|
if pmagic is not None:
|
|
|
pmagic.active_multiengine_client = self
|
|
|
else:
|
|
|
print "You must first load the parallelmagic extension " \
|
|
|
"by doing '%load_ext parallelmagic'"
|
|
|
|
|
|
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()
|
|
|
|
|
|
__all__ = [ 'Client',
|
|
|
'depend',
|
|
|
'require',
|
|
|
'remote',
|
|
|
'parallel',
|
|
|
'RemoteFunction',
|
|
|
'ParallelFunction',
|
|
|
'DirectView',
|
|
|
'LoadBalancedView',
|
|
|
'AsyncResult',
|
|
|
'AsyncMapResult'
|
|
|
]
|
|
|
|
