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/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/zmq_names.py is in python-oslo.messaging 4.6.1-2ubuntu1.

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#    Copyright 2015 Mirantis, Inc.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

from oslo_messaging._drivers.zmq_driver import zmq_async

zmq = zmq_async.import_zmq()


FIELD_TYPE = 'type'
FIELD_FAILURE = 'failure'
FIELD_REPLY = 'reply'
FIELD_LOG_FAILURE = 'log_failure'
FIELD_ID = 'id'
FIELD_MSG_ID = 'message_id'
FIELD_MSG_TYPE = 'msg_type'
FIELD_REPLY_ID = 'reply_id'
FIELD_TARGET = 'target'


IDX_REPLY_TYPE = 1
IDX_REPLY_BODY = 2

MULTIPART_IDX_ENVELOPE = 0
MULTIPART_IDX_BODY = 1


CALL_TYPE = 'call'
CAST_TYPE = 'cast'
CAST_FANOUT_TYPE = 'cast-f'
NOTIFY_TYPE = 'notify'

REPLY_TYPE = 'reply'
ACK_TYPE = 'ack'

MESSAGE_TYPES = (CALL_TYPE,
                 CAST_TYPE,
                 CAST_FANOUT_TYPE,
                 NOTIFY_TYPE)

MULTISEND_TYPES = (CAST_FANOUT_TYPE, NOTIFY_TYPE)
DIRECT_TYPES = (CALL_TYPE, CAST_TYPE)
CAST_TYPES = (CAST_TYPE, CAST_FANOUT_TYPE)
NOTIFY_TYPES = (NOTIFY_TYPE,)
NON_BLOCKING_TYPES = CAST_TYPES + NOTIFY_TYPES


def socket_type_str(socket_type):
    zmq_socket_str = {zmq.DEALER: "DEALER",
                      zmq.ROUTER: "ROUTER",
                      zmq.PUSH: "PUSH",
                      zmq.PULL: "PULL",
                      zmq.REQ: "REQ",
                      zmq.REP: "REP",
                      zmq.PUB: "PUB",
                      zmq.SUB: "SUB"}
    return zmq_socket_str[socket_type]