def close_gn_socket(self):
# Lock acquired to access global list variable and released when the 'with' block ends
with gn_socket_list_lock:
for socket in gn_socket_list:
socket.shutdown = 1
gn_socket_list.remove(socket)
socket.close()
logger.info("Individual GN socket closed.")
logger.critical("NC's individual GN sockets closed."+"\n\n")
def register_gn(self, gn_info):
try:
for single_gn_info in gn_info:
config = ConfigObj(config_file_name)
config["GN Info"][single_gn_info.instance_id] = single_gn_info.sys_info
config["GN Info"][single_gn_info.instance_id]["Registered"] = 'NO'
config.write()
logger.info("GN registration info saved in config file.")
except Exception as inst:
logger.critical("Exception in register_gn:" + str(inst))
def gen_nc_seq_no(self, inst_id):
try:
if inst_id in self.highest_nc_subseq_no:
self.highest_nc_subseq_no[inst_id] = self.increment_no(self.highest_nc_subseq_no[inst_id])
logger.info("Sequence no. generated: " + str(self.highest_nc_subseq_no[inst_id]) +\
"for Node:"+str(inst_id))
return str(self.convert_to_bytearray(self.nc_session_id)) +\
str(self.convert_to_bytearray(self.highest_nc_subseq_no[inst_id]))
return None
except Exception as inst:
logger.critical("Exception in gen_nc_seq_no: " + str(inst))
def handle_accept(self):
try:
logger.info("New GN connection available." + "\n\n")
gn_socket_conn, gn_addr = self.accept()
socket = internal_communicator(gn_socket_conn, gn_addr, self.buffer_mngr)
# Lock acquired to access global list variable and released when the 'with' block ends
with gn_socket_list_lock:
# Pass GN's details and new socket's details to a new socket object created for that GN
gn_socket_list.append(socket)
#logger.debug("Socket object corresponding to new GN created and running.")
except:
logger.critical("Error in handling the GN connection request."+ "\n\n")
pass
def run(self):
try:
self.bind(("127.0.0.1", self.port_for_gn))
# Backlog argument: 5 specifies the maximum number of queued connections\
# and should be at least 1; the maximum value is system-dependent (usually 5)
self.listen(5)
logger.info("Listening on port_for_gn: " + str(self.port_for_gn)+"\n\n")
# starts the loop which constantly checks whether the socket is readable or writable
while True:
# Starts the loop which polls all the open sockets one by one,
# comes out of the asyncore loop after polling for *count*
# times and then repeats after 0.01s.
# Performance widely varies based on sleep time and count's value
# When count=0/None control will never come out of the asyncore loop
asyncore.loop(timeout=0.01, use_poll=True, map=None) # , count=n) can be added. n>=1
time.sleep(0.01)
except Exception as inst:
logger.critical("Exception in nc_server run(): " + str(inst)+"\n\n")
time.sleep(1)
self.run()