def new_server(self, topic):
"""
Function used to generate a new server by specifying a topic
Parameters
----------
topic : string
Name of the topic
Returns
----------
server : nep.server
Server instance
"""
print("SERVER: " + topic + ", waiting NEP master ...")
s, port, ip = nep.masterRegister(self.node_name,
topic,
master_ip='127.0.0.1',
master_port=7000,
socket="server",
pid=self.pid,
data_type="json")
if s:
print("SERVER: " + topic + ", in " + ip + ":" + str(port))
server = nep.server(ip, port,
debug=False) #Create a new server instance
print("SERVER: " + topic + ", socket ready")
return server
else:
print("NEP ERROR: " + topic + ", server socket not connected")
def new_client(self, topic):
"""
Function used to generate a new client by specifying a topic
Parameters
----------
topic : string
Name of the topic
Returns
----------
client : nep.client
Client instance
"""
print("CLIENT: " + topic + ", waiting NEP master ...")
s, port, ip = nep.masterRegister(self.node_name,
topic,
master_ip='127.0.0.1',
master_port=7000,
socket="client",
pid=self.pid,
data_type="json")
if s:
print("CLIENT: " + topic + ", in " + ip + ":" + str(port))
client = nep.client(ip, port, debug=False)
print("CLIENT: " + topic + ", socket ready")
return client
else:
print("NEP ERROR: " + topic + ", client socket not connected")
def __init__(self, topic, timeout=1000, node_name="default", debug=False):
""" Nanomsg surveyor class
Parameters
----------
topic : string
Surveyor topic
timeout : int
Maximun miliseconds waiting for response
debug: bool
If True some additional information of the subscriber is shown
"""
self.topic = topic
print("SURVEY: " + self.topic + " waiting for NEP master ...")
self.pid = os.getpid()
success, port, ip = nep.masterRegister(node_name,
self.topic,
master_ip='127.0.0.1',
master_port=7000,
socket="surveyor",
pid=self.pid,
data_type="json")
print("SURVEY: " + self.topic + " socket ready")
self.debug = debug
if success:
self.NN_installed = False
try:
import nanomsg
self.NN_installed = True
except ImportError:
print("Nanomsg not installed")
self.NN_installed = False
if self.NN_installed == False:
msg = "Unable to use surveyor pattern due that Nanomsg is not installed "
raise ValueError(msg)
self.sock = nanomsg.Socket(nanomsg.SURVEYOR)
endpoint = "tcp://" + ip + ":" + str(port)
self.sock.bind(endpoint)
self.sock.set_int_option(nanomsg.SURVEYOR,
nanomsg.SURVEYOR_DEADLINE, timeout)
time.sleep(1)
if self.debug:
print("surveyor started in: " + str(endpoint))
def __init__(self, topic, node_name = "default", debug = False):
""" Nanomsg surveyor class
Parameters
----------
topic : string
Topic to exchange info
debug: bool
If True some additional information of the subscriber is shown
"""
self.topic = topic
print("RESP: " + self.topic + " waiting for NEP master ...")
self.pid = os.getpid()
success, port, ip = nep.masterRegister(node_name, self.topic, master_ip = '127.0.0.1', master_port = 7000, socket = "respondent", pid = self.pid, data_type = "json")
print("RESP: " + self.topic + " socket ready")
self.debug = debug
if success:
self.NN_installed = False
try:
import nanomsg
self.NN_installed = True
except ImportError:
print ("NEP ERROR: Nanomsg not installed")
self.NN_installed = False
if self.NN_installed == False:
msg = "Unable to use surveyor pattern due that Nanomsg is not installed "
raise ValueError(msg)
self.sock = nanomsg.Socket(nanomsg.RESPONDENT)
endpoint = "tcp://" + ip + ":" + str(port)
self.sock.connect(endpoint)
time.sleep(1)
if self.debug:
print ("respondednt started in: " + str(endpoint))
def __network_selection(self):
""" Get IP and port of this socket
Returns
----------
success : bool
Only if True socket can be connected
port : string
Port used to connect the socket
ip : string
IP used to connect the socket
"""
success = False
ip = "127.0.0.1"
port = "8000"
self.pid = os.getpid()
if self.network == "direct":
# Set the port and ip selected by the user
port = self.conf["port"]
ip = self.conf['ip']
success = True
elif self.network == "broker":
if self.topic != "/nep_node":
print("PUB: " + self.topic + " waiting NEP master ...")
# Register the topic in the NEP Master and get the port and ip
success, port, ip = nep.masterRegister(self.node,
self.topic,
master_ip=self.master_ip,
master_port=7000,
socket="publisher",
mode=self.mode,
pid=self.pid,
data_type=self.msg_type)
if self.topic != "/nep_node":
print("PUB: " + self.topic + " socket ready")
return success, port, ip