server/cwzmq.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Fri, 13 Mar 2015 14:10:40 +0100
changeset 10236 ef3059a692cb
parent 10235 684215aca046
child 10662 10942ed172de
permissions -rw-r--r--
Remove the remote repository-access-through-zmq support Modern methods such as the rqlcontroller cube + the cwclientlib library are the way forward. Closes #2919297.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     1
# -*- coding: utf-8 -*-
10236
ef3059a692cb Remove the remote repository-access-through-zmq support
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 10235
diff changeset
     2
# copyright 2012-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     3
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     4
#
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     5
# This file is part of CubicWeb.
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     6
#
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     7
# CubicWeb is free software: you can redistribute it and/or modify it under the
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     8
# terms of the GNU Lesser General Public License as published by the Free
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
     9
# Software Foundation, either version 2.1 of the License, or (at your option)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    10
# any later version.
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    11
#
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    12
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    13
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    14
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    15
# details.
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    16
#
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    17
# You should have received a copy of the GNU Lesser General Public License along
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    18
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    19
9468
39b7a91a3f4c [repo] pylint cleanup, mainly of imports, with a bit of style
Julien Cristau <julien.cristau@logilab.fr>
parents: 8982
diff changeset
    20
from threading import Thread
39b7a91a3f4c [repo] pylint cleanup, mainly of imports, with a bit of style
Julien Cristau <julien.cristau@logilab.fr>
parents: 8982
diff changeset
    21
from logging import getLogger
8350
e1c05bf6fdeb [zmq] Implement a ZMQ-based Repository (closes #2290125)
David Douard <david.douard@logilab.fr>
parents: 8211
diff changeset
    22
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    23
import zmq
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    24
from zmq.eventloop import ioloop
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    25
import zmq.eventloop.zmqstream
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    26
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    27
from cubicweb import set_log_methods
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    28
10236
ef3059a692cb Remove the remote repository-access-through-zmq support
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 10235
diff changeset
    29
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    30
ctx = zmq.Context()
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    31
10235
684215aca046 Remove remote repository-access-through-pyro support
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 9468
diff changeset
    32
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    33
class ZMQComm(object):
8614
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    34
    """
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    35
    A simple ZMQ-based notification bus.
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    36
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    37
    There should at most one instance of this class attached to a
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    38
    Repository. A typical usage may be something like::
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    39
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    40
        def callback(msg):
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    41
            self.info('received message: %s', ' '.join(msg))
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    42
        repo.app_instances_bus.subscribe('hello', callback)
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    43
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    44
    to subsribe to the 'hello' kind of message. On the other side, to
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    45
    emit a notification, call::
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    46
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    47
       repo.app_instances_bus.publish(['hello', 'world'])
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    48
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    49
    See http://docs.cubicweb.org for more details.
52f576a7394c [zmq] add an introductive docstring on ZMQComm
David Douard <david.douard@logilab.fr>
parents: 8388
diff changeset
    50
    """
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    51
    def __init__(self):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    52
        self.ioloop = ioloop.IOLoop()
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    53
        self._topics = {}
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    54
        self._subscribers = []
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    55
        self.publisher = None
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    56
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    57
    def add_publisher(self, address):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    58
        assert self.publisher is None, "more than one publisher is not supported"
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    59
        self.publisher = Publisher(self.ioloop, address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    60
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    61
    def add_subscription(self, topic, callback):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    62
        for subscriber in self._subscribers:
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    63
            subscriber.subscribe(topic, callback)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    64
        self._topics[topic] = callback
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    65
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    66
    def add_subscriber(self, address):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    67
        subscriber = Subscriber(self.ioloop, address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    68
        for topic, callback in self._topics.iteritems():
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    69
            subscriber.subscribe(topic, callback)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    70
        self._subscribers.append(subscriber)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    71
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    72
    def publish(self, msg):
8982
6bc1c1b4473a [zmq] make publish address optional
Julien Cristau <julien.cristau@logilab.fr>
parents: 8695
diff changeset
    73
        if self.publisher is None:
6bc1c1b4473a [zmq] make publish address optional
Julien Cristau <julien.cristau@logilab.fr>
parents: 8695
diff changeset
    74
            return
8211
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    75
        self.publisher.send(msg)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    76
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    77
    def start(self):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    78
        Thread(target=self.ioloop.start).start()
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    79
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    80
    def stop(self):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    81
        self.ioloop.add_callback(self.ioloop.stop)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    82
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    83
    def __del__(self):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    84
        self.ioloop.close()
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    85
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    86
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    87
class Publisher(object):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    88
    def __init__(self, ioloop, address):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    89
        self.address = address
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    90
        self._topics = {}
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    91
        self._subscribers = []
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    92
        self.ioloop = ioloop
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    93
        def callback():
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    94
            s = ctx.socket(zmq.PUB)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    95
            self.stream = zmq.eventloop.zmqstream.ZMQStream(s, io_loop=ioloop)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    96
            self.stream.bind(self.address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    97
            self.debug('start publisher on %s', self.address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    98
        ioloop.add_callback(callback)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
    99
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   100
    def send(self, msg):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   101
        self.ioloop.add_callback(lambda:self.stream.send_multipart(msg))
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   102
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   103
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   104
class Subscriber(object):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   105
    def __init__(self, ioloop, address):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   106
        self.address = address
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   107
        self.dispatch_table = {}
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   108
        self.ioloop = ioloop
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   109
        def callback():
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   110
            s = ctx.socket(zmq.SUB)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   111
            self.stream = zmq.eventloop.zmqstream.ZMQStream(s, io_loop=ioloop)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   112
            self.stream.on_recv(self.dispatch)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   113
            self.stream.connect(self.address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   114
            self.debug('start subscriber on %s', self.address)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   115
        ioloop.add_callback(callback)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   116
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   117
    def dispatch(self, msg):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   118
        try:
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   119
            f = self.dispatch_table[msg[0]]
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   120
        except KeyError:
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   121
            return
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   122
        f(msg)
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   123
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   124
    def subscribe(self, topic, callback):
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   125
        self.dispatch_table[topic] = callback
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   126
        self.ioloop.add_callback(lambda: self.stream.setsockopt(zmq.SUBSCRIBE, topic))
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   127
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   128
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   129
set_log_methods(Publisher, getLogger('cubicweb.zmq.pub'))
543e1579ba0d [repo] Add a publish/subscribe mechanism for inter-instance communication using zmq
Julien Cristau <julien.cristau@logilab.fr>, Quentin Roquefort <quentin@kpsule.me>
parents:
diff changeset
   130
set_log_methods(Subscriber, getLogger('cubicweb.zmq.sub'))