def main():
"""Run on program start.
Checks for other masters and initiates itself as either master or slave.
"""
m_sock = network.socket_setup(39500)
try:
master_addr = m_sock.recvfrom(4096)[1]
except socket.timeout:
state = 'master'
m_sock.close()
if state == 'master':
mstr = master.Master()
mstr.run()
print_thread = Thread(target=mstr.print_system)
print_thread.setDaemon(True)
print_thread.start()
elev = elevator.Elev()
elev.state = 'master'
elev.master_addr = mstr.ip
elev.run(constants.ELEV_MODE)
states.master()
else:
elev = elevator.Elev()
elev.master_addr = master_addr[0]
elev.run(constants.ELEV_MODE)
states.slave(elev)
backup = master.Master()
elev.backup = backup
states.backup(elev, backup)
states.master()
def backup(elev, backup):
listen_master = network.socket_setup(39500)
while elev.state == 'backup':
backup.print_system()
try:
msg = listen_master.recv(4096)
except (socket.timeout):
state = 'master'
listen_master.close()
backup.backup_ip = ''
backup.run()
#Change state to master
#Clear all backup attributes
except (KeyboardInterrupt):
backup = False
listen_master.close()
def backup(elev, backup):
listen_master = network.socket_setup(39500)
while elev.state == 'backup':
backup.print_system()
try:
msg = listen_master.recv(4096)
except(socket.timeout):
state = 'master'
listen_master.close()
backup.backup_ip = ''
backup.run()
#Change state to master
#Clear all backup attributes
except(KeyboardInterrupt):
backup = False
listen_master.close()
