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"""Python binding for 0MQ device function."""
#
# Copyright (c) 2010-2011 Brian E. Granger & Min Ragan-Kelley
#
# This file is part of pyzmq.
#
# pyzmq is free software; you can redistribute it and/or modify it under
# the terms of the Lesser GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# pyzmq is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Lesser GNU General Public License for more details.
#
# You should have received a copy of the Lesser GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from libzmq cimport zmq_device, zmq_proxy, ZMQ_VERSION_MAJOR
from zmq.backend.cython.socket cimport Socket as cSocket
from zmq.backend.cython.checkrc cimport _check_rc
from zmq.error import InterruptedSystemCall
#-----------------------------------------------------------------------------
# Basic device API
#-----------------------------------------------------------------------------
def device(int device_type, cSocket frontend, cSocket backend=None):
"""device(device_type, frontend, backend)
Start a zeromq device.
.. deprecated:: libzmq-3.2
Use zmq.proxy
Parameters
----------
device_type : (QUEUE, FORWARDER, STREAMER)
The type of device to start.
frontend : Socket
The Socket instance for the incoming traffic.
backend : Socket
The Socket instance for the outbound traffic.
"""
if ZMQ_VERSION_MAJOR >= 3:
return proxy(frontend, backend)
cdef int rc = 0
while True:
with nogil:
rc = zmq_device(device_type, frontend.handle, backend.handle)
try:
_check_rc(rc)
except InterruptedSystemCall:
continue
else:
break
return rc
def proxy(cSocket frontend, cSocket backend, cSocket capture=None):
"""proxy(frontend, backend, capture)
Start a zeromq proxy (replacement for device).
.. versionadded:: libzmq-3.2
.. versionadded:: 13.0
Parameters
----------
frontend : Socket
The Socket instance for the incoming traffic.
backend : Socket
The Socket instance for the outbound traffic.
capture : Socket (optional)
The Socket instance for capturing traffic.
"""
cdef int rc = 0
cdef void* capture_handle
if isinstance(capture, cSocket):
capture_handle = capture.handle
else:
capture_handle = NULL
while True:
with nogil:
rc = zmq_proxy(frontend.handle, backend.handle, capture_handle)
try:
_check_rc(rc)
except InterruptedSystemCall:
continue
else:
break
return rc
__all__ = ['device', 'proxy']
|
