def node_register(self, message):
""" Module registration authority handling. Can be overriden by user"""
try:
# create an index pointer for each module name
namel = {v["name"]: k for k, v in self._modules.iteritems()}
if not self._modules.keys():
mod_id = 1
# If the name exists give module the same id
elif message.device_name in namel:
mod_id = namel[message.device_name]
# TODO make it clean old keys based on last time
else:
mod_id = max(self._modules.keys()) + 1
log.debug("Handing out new module id %d" % mod_id)
self._modules[mod_id] = {"name": message.device_name,
"last": message.time}
# prepare the payload for the acknowlegement
pl = self.messenger.new_service(msg="%d" % mod_id)
response = self.messenger.ack_msg(pl)
# Repond to node with the module id
return(response)
except Exception as e:
log.error("Exception %s" % e)
pl = self.messenger.new_service(name="%s" % e)
response = self.messenger.ack_msg(pl)
# Repond to node with exception
return(response)
def _respond(self, req):
""" Reponse """
# Note: In production code this needs to be Async since tx over
# the wire round trip time >= over the ram rtt. Alternatively it
# should aknowledge the inproc message and then manage the remote
# connection without time contrains
# return (self.upload("Nodemodule: %s" % req).replace("Nodemodule",
# store all incoming messages to the queue
# in order to proccess in the node_main
self.rx_q.put(req, block=False, timeout=self._rx_timeout)
# Detect and handle registration message
if req.msg_type == NodeMessenger.REG:
return self.node_register(req)
log.info("Forwarding message")
print(req)
# Wrap it around an uplink message
uplink_msg = self.remote.messenger.preamble_msg([req])
# This is the part that uplink response message is stripped out
# I am taking one wrong assumptions here, for demo purposes
# That the message contains one peripheral peripheral[0]
# TODO make it real code
return (self.upload(uplink_msg).peripheral[0])
def run(cmd):
""" Execute shell command in detached mdoe."""
proc = Popen([cmd], stdout=PIPE, stderr=PIPE, shell=True)
ret, err = proc.communicate()
if err:
# ignore warnings in error stream
if "Warning" in err:
CLogger.warning(err.strip())
return err
raise PiBlinkerError(err)
else:
return ret
def _respond(self, req):
""" Method defines how the data should be proccessed and
return a response to caller. Should be overridden by user """
# Note: Returning None will cancell server response but can block
# Socket based on zmq configuration
log.info("Server Received message")
print(req)
# Detect and handle registration message
if req.msg_type == self.ul_messenger.REG:
return self.network_register(req)
return req
def node_main(self):
""" User implemented main loop for node """
test_msg_pl = self.messenger.new_service("Hello %d" % self.counter)
test_msg = self.messenger.solicited_msg(test_msg_pl)
self.send_msg(test_msg)
log.info("Nodemodule: Sending")
print(test_msg)
gevent.sleep(0.3)
if self.has_msg():
log.info("Nodemodule: Received")
rep = self.get_msg(blk=True)
print("%s" % rep)
self.counter += 1
def _respond(self, req):
""" Method defines how the data should be proccessed and
return a response to caller. Should be overridden by user """
log.info("Server Received message")
print(req)
# Detect and handle registration message
if req.metadata.message_type == self.messenger.REG:
return self.network_register(req)
# I am taking two wrong assumptions here, for demo purposes
# That the message contains one peripheral peripheral[0]
# And that it contains one service payload[0]
# TODO make it real code
msg = req.peripheral[0].payload[0].msg
req.peripheral[0].payload[0].msg = "%s to you too" % msg
return req
def network_register(self, message):
try:
metadata = message.metadata
loc = message.location
# create an index pointer for each module name
namel = {v["name"]: k for k, v in self._clients.iteritems()}
if not self._clients.keys():
client_id = 1
# If the name exists give module the same id
elif metadata.device_name in namel:
client_id = namel[metadata.device_name]
# TODO make it clean old keys based on last time
else:
client_id = max(self._clients.keys()) + 1
if loc:
location = self.messenger._location_tpl(lat=loc.lat,
long=loc.long,
street=loc.street,
building=loc.building,
floor=loc.floor,
room=loc.room,
city=loc.city,
country=loc.country,
postcode=loc.postcode)
self._clients[client_id] = {"name": metadata.device_name,
"app_id": metadata.app_id,
"network_id": metadata.network_id,
"last": metadata.time,
"location": location}
# prepare the payload for the acknowlegement
response = self.messenger.ack_msg(cmd="register",
params=["%s" % client_id])
# Repond to node with the module id
return(response)
except Exception as e:
log.error("Exception %s" % e)
# prepare the payload for the acknowlegement
response = self.messenger.nack_msg(cmd="register",
params=["%s" % e])
# Repond to node with exception
return(response)
def network_register(self):
try:
reg_msg = self.ul_messenger.register_msg()
# Attempt to register and get the response
reginfo = self.upload(reg_msg)
# If server accepted registration continue
if reginfo.metadata.message_type == self.ul_messenger.ACK:
node_id = int([n for n in reginfo.control.params][0])
self.messenger.set_id(node_id)
log.info("Registration Accepted, new id %d" % node_id)
return
else:
raise Exception()
except Exception as e:
log.error("Failed to register to network %s" % e)
sys.exit(1)
print(reg_msg)
def setup(self,
log_level="ver_debug",
log_label="PiBlinker",
log_path=None,
log_colors=None):
""" Module Init."""
# Map a color to GPIO.BCM PIN
self.LEDS = {"RED": [17],
"GREEN": [18],
"BLUE": [27],
"PURPLE": [17, 27],
"YELLOW": [17, 18],
"CYAN": [18, 27],
"WHITE": [17, 18, 27]}
self.last_mode = 0
# Configure the GPIO ports in hardware
map(self.run, [(x % v) for n in self.LEDS.values()
for v in n
for x in ["gpio export %d out",
"gpio -g mode %d out"]])
self.i2c_devices = {}
# Assosiate log levels with colors
if not log_colors:
log_colors = {"base_color": "CYAN",
"info": "HBLUE",
"warning": "YELLOW",
"error": "RED",
"debug": "GREEN",
"ver_debug": "GREEN"}
# Initalise the logging module
CLogger.setup(log_label, log_level, log_path, log_colors)
return self
def node_register(self):
""" User accessible method for handling registration message """
try:
# Prepare and send the registration message
init_msg = self.messenger.register_msg()
self._send(msg=init_msg)
# Accept the new module_id from server
reginfo = self._recv()
# If server accepted registration continue
if reginfo.msg_type == NodeMessenger.ACK:
node_id = [n for n in reginfo.payload][0].msg
node_id = int(node_id)
self.messenger.set_id(node_id)
log.info("Registration Accepted, new id %d" % node_id)
return
else:
raise Exception()
except Exception as e:
log.error("Failed to register module %s" % e)
sys.exit(1)
import zmq.green as zmq
import zmq.error
import gevent
from zclient import ZClient
from abc import ABCMeta, abstractmethod
from nodemessenger import NodeMessenger
from colorlogger import CLogger as log
__author__ = "Minos Galanakis"
__license__ = "LGPL"
__version__ = "0.0.1"
__email__ = "*****@*****.**"
__project__ = "ga"
__date__ = "30-05-2017"
log.setup(__file__, projectpath.log_level)
class NodeModule(ZClient):
""" Communications module that implemts a request/response logic """
__metaclass__ = ABCMeta
def __init__(self,
ipcfname="zmqnode",
modulename="NodeModule"):
""" Instantiate an client object that will accept """
super(NodeModule, self).__init__(ipcfname,
None,
"ipc",
def debug(self, *args):
""" Print a debug message and notify the user with the LED."""
CLogger.debug(args[-1])
from __future__ import print_function
import projectpath
import sys
import gevent
import zmq.green as zmq
from zgreenbase import zeroGreenBase
from colorlogger import CLogger as log
__author__ = "Minos Galanakis"
__license__ = "LGPL"
__version__ = "X.X.X"
__email__ = "*****@*****.**"
__project__ = "codename"
__date__ = "26-05-2017"
log.setup(__file__, "debug")
class ZClient(zeroGreenBase):
def __init__(self, hostname, port, transport, zmq_mode, max_workers=None):
""" Instantiate an client object that will accept """
super(ZClient, self).__init__(hostname, port, transport, zmq_mode)
def connect(self):
self.socket.connect(self.binding)
def disconnect(self):
self.socket.disconnect(self.binding)
def _send(self, **kwargs):
