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"""some generic utilities for dealing with classes, urls, and serialization
|
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Authors:
|
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* Min RK
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010-2011 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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# Standard library imports.
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import logging
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import os
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import re
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import stat
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import socket
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import sys
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from signal import signal, SIGINT, SIGABRT, SIGTERM
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try:
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from signal import SIGKILL
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|
except ImportError:
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SIGKILL=None
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|
try:
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import cPickle
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pickle = cPickle
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|
except:
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cPickle = None
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import pickle
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# System library imports
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import zmq
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from zmq.log import handlers
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# IPython imports
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from IPython.utils.pickleutil import can, uncan, canSequence, uncanSequence
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from IPython.utils.newserialized import serialize, unserialize
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from IPython.zmq.log import EnginePUBHandler
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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class Namespace(dict):
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"""Subclass of dict for attribute access to keys."""
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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 NameError(key)
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def __setattr__(self, key, value):
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"""setattr aliased to setitem, with strict"""
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|
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if hasattr(dict, key):
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|
raise KeyError("Cannot override dict keys %r"%key)
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|
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self[key] = value
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class ReverseDict(dict):
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"""simple double-keyed subset of dict methods."""
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def __init__(self, *args, **kwargs):
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dict.__init__(self, *args, **kwargs)
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self._reverse = dict()
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for key, value in self.iteritems():
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|
self._reverse[value] = key
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def __getitem__(self, key):
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try:
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return dict.__getitem__(self, key)
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|
except KeyError:
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return self._reverse[key]
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|
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def __setitem__(self, key, value):
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if key in self._reverse:
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|
raise KeyError("Can't have key %r on both sides!"%key)
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|
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dict.__setitem__(self, key, value)
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self._reverse[value] = key
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|
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def pop(self, key):
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value = dict.pop(self, key)
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self._reverse.pop(value)
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return value
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|
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def get(self, key, default=None):
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try:
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return self[key]
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|
except KeyError:
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|
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return default
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|
|
|
|
|
#-----------------------------------------------------------------------------
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|
|
# Functions
|
|
|
#-----------------------------------------------------------------------------
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|
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def validate_url(url):
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|
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"""validate a url for zeromq"""
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|
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if not isinstance(url, basestring):
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|
|
raise TypeError("url must be a string, not %r"%type(url))
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|
|
url = url.lower()
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|
|
proto_addr = url.split('://')
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|
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assert len(proto_addr) == 2, 'Invalid url: %r'%url
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|
|
proto, addr = proto_addr
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|
|
assert proto in ['tcp','pgm','epgm','ipc','inproc'], "Invalid protocol: %r"%proto
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|
|
|
|
|
# domain pattern adapted from http://www.regexlib.com/REDetails.aspx?regexp_id=391
|
|
|
# author: Remi Sabourin
|
|
|
pat = re.compile(r'^([\w\d]([\w\d\-]{0,61}[\w\d])?\.)*[\w\d]([\w\d\-]{0,61}[\w\d])?$')
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|
|
|
|
|
if proto == 'tcp':
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|
|
lis = addr.split(':')
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|
|
assert len(lis) == 2, 'Invalid url: %r'%url
|
|
|
addr,s_port = lis
|
|
|
try:
|
|
|
port = int(s_port)
|
|
|
except ValueError:
|
|
|
raise AssertionError("Invalid port %r in url: %r"%(port, url))
|
|
|
|
|
|
assert addr == '*' or pat.match(addr) is not None, 'Invalid url: %r'%url
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|
|
|
|
|
else:
|
|
|
# only validate tcp urls currently
|
|
|
pass
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|
|
|
|
|
return True
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|
|
|
|
|
|
|
|
def validate_url_container(container):
|
|
|
"""validate a potentially nested collection of urls."""
|
|
|
if isinstance(container, basestring):
|
|
|
url = container
|
|
|
return validate_url(url)
|
|
|
elif isinstance(container, dict):
|
|
|
container = container.itervalues()
|
|
|
|
|
|
for element in container:
|
|
|
validate_url_container(element)
|
|
|
|
|
|
|
|
|
def split_url(url):
|
|
|
"""split a zmq url (tcp://ip:port) into ('tcp','ip','port')."""
|
|
|
proto_addr = url.split('://')
|
|
|
assert len(proto_addr) == 2, 'Invalid url: %r'%url
|
|
|
proto, addr = proto_addr
|
|
|
lis = addr.split(':')
|
|
|
assert len(lis) == 2, 'Invalid url: %r'%url
|
|
|
addr,s_port = lis
|
|
|
return proto,addr,s_port
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|
|
|
|
|
def disambiguate_ip_address(ip, location=None):
|
|
|
"""turn multi-ip interfaces '0.0.0.0' and '*' into connectable
|
|
|
ones, based on the location (default interpretation of location is localhost)."""
|
|
|
if ip in ('0.0.0.0', '*'):
|
|
|
external_ips = socket.gethostbyname_ex(socket.gethostname())[2]
|
|
|
if location is None or location in external_ips:
|
|
|
ip='127.0.0.1'
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|
|
elif location:
|
|
|
return location
|
|
|
return ip
|
|
|
|
|
|
def disambiguate_url(url, location=None):
|
|
|
"""turn multi-ip interfaces '0.0.0.0' and '*' into connectable
|
|
|
ones, based on the location (default interpretation is localhost).
|
|
|
|
|
|
This is for zeromq urls, such as tcp://*:10101."""
|
|
|
try:
|
|
|
proto,ip,port = split_url(url)
|
|
|
except AssertionError:
|
|
|
# probably not tcp url; could be ipc, etc.
|
|
|
return url
|
|
|
|
|
|
ip = disambiguate_ip_address(ip,location)
|
|
|
|
|
|
return "%s://%s:%s"%(proto,ip,port)
|
|
|
|
|
|
def serialize_object(obj, threshold=64e-6):
|
|
|
"""Serialize an object into a list of sendable buffers.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
obj : object
|
|
|
The object to be serialized
|
|
|
threshold : float
|
|
|
The threshold for not double-pickling the content.
|
|
|
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
('pmd', [bufs]) :
|
|
|
where pmd is the pickled metadata wrapper,
|
|
|
bufs is a list of data buffers
|
|
|
"""
|
|
|
databuffers = []
|
|
|
if isinstance(obj, (list, tuple)):
|
|
|
clist = canSequence(obj)
|
|
|
slist = map(serialize, clist)
|
|
|
for s in slist:
|
|
|
if s.typeDescriptor in ('buffer', 'ndarray') or s.getDataSize() > threshold:
|
|
|
databuffers.append(s.getData())
|
|
|
s.data = None
|
|
|
return pickle.dumps(slist,-1), databuffers
|
|
|
elif isinstance(obj, dict):
|
|
|
sobj = {}
|
|
|
for k in sorted(obj.iterkeys()):
|
|
|
s = serialize(can(obj[k]))
|
|
|
if s.typeDescriptor in ('buffer', 'ndarray') or s.getDataSize() > threshold:
|
|
|
databuffers.append(s.getData())
|
|
|
s.data = None
|
|
|
sobj[k] = s
|
|
|
return pickle.dumps(sobj,-1),databuffers
|
|
|
else:
|
|
|
s = serialize(can(obj))
|
|
|
if s.typeDescriptor in ('buffer', 'ndarray') or s.getDataSize() > threshold:
|
|
|
databuffers.append(s.getData())
|
|
|
s.data = None
|
|
|
return pickle.dumps(s,-1),databuffers
|
|
|
|
|
|
|
|
|
def unserialize_object(bufs):
|
|
|
"""reconstruct an object serialized by serialize_object from data buffers."""
|
|
|
bufs = list(bufs)
|
|
|
sobj = pickle.loads(bufs.pop(0))
|
|
|
if isinstance(sobj, (list, tuple)):
|
|
|
for s in sobj:
|
|
|
if s.data is None:
|
|
|
s.data = bufs.pop(0)
|
|
|
return uncanSequence(map(unserialize, sobj)), bufs
|
|
|
elif isinstance(sobj, dict):
|
|
|
newobj = {}
|
|
|
for k in sorted(sobj.iterkeys()):
|
|
|
s = sobj[k]
|
|
|
if s.data is None:
|
|
|
s.data = bufs.pop(0)
|
|
|
newobj[k] = uncan(unserialize(s))
|
|
|
return newobj, bufs
|
|
|
else:
|
|
|
if sobj.data is None:
|
|
|
sobj.data = bufs.pop(0)
|
|
|
return uncan(unserialize(sobj)), bufs
|
|
|
|
|
|
def pack_apply_message(f, args, kwargs, threshold=64e-6):
|
|
|
"""pack up a function, args, and kwargs to be sent over the wire
|
|
|
as a series of buffers. Any object whose data is larger than `threshold`
|
|
|
will not have their data copied (currently only numpy arrays support zero-copy)"""
|
|
|
msg = [pickle.dumps(can(f),-1)]
|
|
|
databuffers = [] # for large objects
|
|
|
sargs, bufs = serialize_object(args,threshold)
|
|
|
msg.append(sargs)
|
|
|
databuffers.extend(bufs)
|
|
|
skwargs, bufs = serialize_object(kwargs,threshold)
|
|
|
msg.append(skwargs)
|
|
|
databuffers.extend(bufs)
|
|
|
msg.extend(databuffers)
|
|
|
return msg
|
|
|
|
|
|
def unpack_apply_message(bufs, g=None, copy=True):
|
|
|
"""unpack f,args,kwargs from buffers packed by pack_apply_message()
|
|
|
Returns: original f,args,kwargs"""
|
|
|
bufs = list(bufs) # allow us to pop
|
|
|
assert len(bufs) >= 3, "not enough buffers!"
|
|
|
if not copy:
|
|
|
for i in range(3):
|
|
|
bufs[i] = bufs[i].bytes
|
|
|
cf = pickle.loads(bufs.pop(0))
|
|
|
sargs = list(pickle.loads(bufs.pop(0)))
|
|
|
skwargs = dict(pickle.loads(bufs.pop(0)))
|
|
|
# print sargs, skwargs
|
|
|
f = uncan(cf, g)
|
|
|
for sa in sargs:
|
|
|
if sa.data is None:
|
|
|
m = bufs.pop(0)
|
|
|
if sa.getTypeDescriptor() in ('buffer', 'ndarray'):
|
|
|
# always use a buffer, until memoryviews get sorted out
|
|
|
sa.data = buffer(m)
|
|
|
# disable memoryview support
|
|
|
# if copy:
|
|
|
# sa.data = buffer(m)
|
|
|
# else:
|
|
|
# sa.data = m.buffer
|
|
|
else:
|
|
|
if copy:
|
|
|
sa.data = m
|
|
|
else:
|
|
|
sa.data = m.bytes
|
|
|
|
|
|
args = uncanSequence(map(unserialize, sargs), g)
|
|
|
kwargs = {}
|
|
|
for k in sorted(skwargs.iterkeys()):
|
|
|
sa = skwargs[k]
|
|
|
if sa.data is None:
|
|
|
m = bufs.pop(0)
|
|
|
if sa.getTypeDescriptor() in ('buffer', 'ndarray'):
|
|
|
# always use a buffer, until memoryviews get sorted out
|
|
|
sa.data = buffer(m)
|
|
|
# disable memoryview support
|
|
|
# if copy:
|
|
|
# sa.data = buffer(m)
|
|
|
# else:
|
|
|
# sa.data = m.buffer
|
|
|
else:
|
|
|
if copy:
|
|
|
sa.data = m
|
|
|
else:
|
|
|
sa.data = m.bytes
|
|
|
|
|
|
kwargs[k] = uncan(unserialize(sa), g)
|
|
|
|
|
|
return f,args,kwargs
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# helpers for implementing old MEC API via view.apply
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def interactive(f):
|
|
|
"""decorator for making functions appear as interactively defined.
|
|
|
This results in the function being linked to the user_ns as globals()
|
|
|
instead of the module globals().
|
|
|
"""
|
|
|
f.__module__ = '__main__'
|
|
|
return f
|
|
|
|
|
|
@interactive
|
|
|
def _push(ns):
|
|
|
"""helper method for implementing `client.push` via `client.apply`"""
|
|
|
globals().update(ns)
|
|
|
|
|
|
@interactive
|
|
|
def _pull(keys):
|
|
|
"""helper method for implementing `client.pull` via `client.apply`"""
|
|
|
user_ns = globals()
|
|
|
if isinstance(keys, (list,tuple, set)):
|
|
|
for key in keys:
|
|
|
if not user_ns.has_key(key):
|
|
|
raise NameError("name '%s' is not defined"%key)
|
|
|
return map(user_ns.get, keys)
|
|
|
else:
|
|
|
if not user_ns.has_key(keys):
|
|
|
raise NameError("name '%s' is not defined"%keys)
|
|
|
return user_ns.get(keys)
|
|
|
|
|
|
@interactive
|
|
|
def _execute(code):
|
|
|
"""helper method for implementing `client.execute` via `client.apply`"""
|
|
|
exec code in globals()
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# extra process management utilities
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
_random_ports = set()
|
|
|
|
|
|
def select_random_ports(n):
|
|
|
"""Selects and return n random ports that are available."""
|
|
|
ports = []
|
|
|
for i in xrange(n):
|
|
|
sock = socket.socket()
|
|
|
sock.bind(('', 0))
|
|
|
while sock.getsockname()[1] in _random_ports:
|
|
|
sock.close()
|
|
|
sock = socket.socket()
|
|
|
sock.bind(('', 0))
|
|
|
ports.append(sock)
|
|
|
for i, sock in enumerate(ports):
|
|
|
port = sock.getsockname()[1]
|
|
|
sock.close()
|
|
|
ports[i] = port
|
|
|
_random_ports.add(port)
|
|
|
return ports
|
|
|
|
|
|
def signal_children(children):
|
|
|
"""Relay interupt/term signals to children, for more solid process cleanup."""
|
|
|
def terminate_children(sig, frame):
|
|
|
logging.critical("Got signal %i, terminating children..."%sig)
|
|
|
for child in children:
|
|
|
child.terminate()
|
|
|
|
|
|
sys.exit(sig != SIGINT)
|
|
|
# sys.exit(sig)
|
|
|
for sig in (SIGINT, SIGABRT, SIGTERM):
|
|
|
signal(sig, terminate_children)
|
|
|
|
|
|
def generate_exec_key(keyfile):
|
|
|
import uuid
|
|
|
newkey = str(uuid.uuid4())
|
|
|
with open(keyfile, 'w') as f:
|
|
|
# f.write('ipython-key ')
|
|
|
f.write(newkey+'\n')
|
|
|
# set user-only RW permissions (0600)
|
|
|
# this will have no effect on Windows
|
|
|
os.chmod(keyfile, stat.S_IRUSR|stat.S_IWUSR)
|
|
|
|
|
|
|
|
|
def integer_loglevel(loglevel):
|
|
|
try:
|
|
|
loglevel = int(loglevel)
|
|
|
except ValueError:
|
|
|
if isinstance(loglevel, str):
|
|
|
loglevel = getattr(logging, loglevel)
|
|
|
return loglevel
|
|
|
|
|
|
def connect_logger(logname, context, iface, root="ip", loglevel=logging.DEBUG):
|
|
|
logger = logging.getLogger(logname)
|
|
|
if any([isinstance(h, handlers.PUBHandler) for h in logger.handlers]):
|
|
|
# don't add a second PUBHandler
|
|
|
return
|
|
|
loglevel = integer_loglevel(loglevel)
|
|
|
lsock = context.socket(zmq.PUB)
|
|
|
lsock.connect(iface)
|
|
|
handler = handlers.PUBHandler(lsock)
|
|
|
handler.setLevel(loglevel)
|
|
|
handler.root_topic = root
|
|
|
logger.addHandler(handler)
|
|
|
logger.setLevel(loglevel)
|
|
|
|
|
|
def connect_engine_logger(context, iface, engine, loglevel=logging.DEBUG):
|
|
|
logger = logging.getLogger()
|
|
|
if any([isinstance(h, handlers.PUBHandler) for h in logger.handlers]):
|
|
|
# don't add a second PUBHandler
|
|
|
return
|
|
|
loglevel = integer_loglevel(loglevel)
|
|
|
lsock = context.socket(zmq.PUB)
|
|
|
lsock.connect(iface)
|
|
|
handler = EnginePUBHandler(engine, lsock)
|
|
|
handler.setLevel(loglevel)
|
|
|
logger.addHandler(handler)
|
|
|
logger.setLevel(loglevel)
|
|
|
return logger
|
|
|
|
|
|
def local_logger(logname, loglevel=logging.DEBUG):
|
|
|
loglevel = integer_loglevel(loglevel)
|
|
|
logger = logging.getLogger(logname)
|
|
|
if any([isinstance(h, logging.StreamHandler) for h in logger.handlers]):
|
|
|
# don't add a second StreamHandler
|
|
|
return
|
|
|
handler = logging.StreamHandler()
|
|
|
handler.setLevel(loglevel)
|
|
|
logger.addHandler(handler)
|
|
|
logger.setLevel(loglevel)
|
|
|
return logger
|
|
|
|
|
|
|
