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#
# Copyright 2015 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
"""
Python Client classes for interfacing with the GNU Radio ControlPort interface
and for accessing Performance Counters.
While ControlPort and these client classes are designed to support multiple
Remote Procedure Call (RPC) transports, the Apache Thrift middle-ware RPC
is currently the only supported transport.
"""
from __future__ import print_function
from __future__ import unicode_literals
from gnuradio.ctrlport.RPCConnection import RPCMethods
try:
from gnuradio.ctrlport.RPCConnectionThrift import RPCConnectionThrift
from thrift.transport.TTransport import TTransportException
except ImportError:
print("ControlPort requires Thrift, but it was not found!")
pass
"""
GNURadioControlPortClient is the main class for creating a GNU Radio
ControlPort client application for all transports.
"""
class GNURadioControlPortClient(object):
"""
Constructor for creating a ControlPort connection to a specified host / port
Args:
host: hostname of the connection. Specifying None (default) will
select the loopback interface.
port: port number to use for the connection. Specifying None (default)
will select the specified RPC transport's default port number, if
the transport has a default.
rpcmethod: This string specifies the RPC transport to use for the
client connection. The default implementation currently uses
the Apache Thrift RPC transport. The value specified here must
be one of the transport keys listed in the RPCMethods dictionary
above
callback: This optional parameter is a callback function that will be passed
a reference to the Client implementation for the RPC transport specified
by rpcmethod. The callback will be executed after the client has been
constructed, but before __init__ returns.
blockingcallback: This optional parameter is a callback function with
no parameters that will be executed after callback() is executed,
but before __init__ returns. It is useful if your application
requires that a blocking function be called to start the application,
such as QtGui.QApplication.exec_
"""
def __init__(self, host=None, port=None, rpcmethod='thrift', callback=None, blockingcallback=None):
self.client = None
if rpcmethod in RPCMethods:
if rpcmethod == 'thrift':
self.client = RPCConnectionThrift(host, port)
if not callback is None:
callback(self.client)
if not blockingcallback is None:
blockingcallback()
else:
print(("Unsupported RPC method: ", rpcmethod))
raise ValueError()
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