def keepAlive():
while True:
try:
# Wait keepAlive period
time.sleep(config.timeout / 2)
except:
break
# Connect to master and ask for status
print("{time:s} Send KeepAlive".format(time=Utilities.current_time_formatted()))
try:
conn = messages.Connection(socket.create_connection((config.parent_address, config.parent_port)))
connections_manager.add(conn)
msg = messages.Status(config.id, [{ "State": "Idle" }])
conn.send(msg)
# Inform parent about lower backup registrations and deregistrations
for msg in backup_servers.getParentMessages():
conn.send(msg)
conn.socket.shutdown(socket.SHUT_WR)
# Read all messages from client separated by 0x17 until EOC (write stream closed)
for msg in conn:
parseMessageBCS(msg)
conn.socket.close()
connections_manager.remove(conn)
except OSError as msg:
print("KeepAlive connection error: {:s}".format(str(msg)))
print("Assuming main communication server role")
# Refresh components timeout, else when assume main cs role all would be thought dead
for component in components.active():
component.touch()
config.is_backup = False
break
def removeInactiveComponents():
removeInactiveBackup()
if config.is_backup: return
for component in components.active():
# Wait twice the timeout, as nodes are sending state each timeout seconds
# Don't check CSs, as their state is updated only for the parent in backups list
if not component.isAlive(2 * config.timeout * 1000) and component.type != "CommunicationServer":
# Release all problems or tasks assigned to that component
problems.release(component.id)
print("Removing inactive component: #{:d} ({:s})".format(component.id, type(component).__name__))
# Backup message: remove component
backup_msg = copy.deepcopy(component.registerMessage)
backup_msg.Id = component.id
backup_msg.Deregister = True
backup_servers.registerQueueAppend(backup_msg)
