def report_new_node(new_node):
try:
if app.status == C.STATUS_LEADER:
app_logger.info(info_stamp() + "%s joined", new_node)
app.conn.broadcast_new_node(new_node, app.topology)
else:
leaderip, leaderport = decode_id(app.nodes[C.NODE_LEADER])
app.conn.new_node_report(leaderip, leaderport, new_node)
except:
pass
def process_leader_message(leader_json):
if leader_json == app.id:
app_logger.debug(debug_stamp() +
'Leader information distributed successfully')
backip, backport = decode_id(app.nodes[C.NODE_BACK])
elif app.nodes[C.NODE_FRONT]:
dstip, dstport = decode_id(app.nodes[C.NODE_FRONT])
app.conn.send_leader(dstip, dstport, leader_json)
app.nodes[C.NODE_LEADER] = leader_json
app_logger.info(info_stamp() + 'New leader: %s', app.nodes[C.NODE_LEADER])
def report_dead_node(dead_node):
try:
leaderip, leaderport = decode_id(app.nodes[C.NODE_LEADER])
if app.status == C.STATUS_LEADER:
app_logger.info(info_stamp() + "%s lost connection", dead_node)
app.conn.broadcast_dead_node(dead_node, app.topology)
remove_node(dead_node)
else:
app.conn.death_report(leaderip, leaderport, dead_node)
except:
pass
def logout():
if app.nodes[C.NODE_FRONT] != app.nodes[C.NODE_BACK]:
backip, backport = decode_id(app.nodes[C.NODE_BACK])
frontip, frontport = decode_id(app.nodes[C.NODE_FRONT])
app.conn.send_front_setting(backip, backport, app.nodes[C.NODE_FRONT])
app.conn.send_back_setting(frontip, frontport, app.nodes[C.NODE_BACK])
if app.status == C.STATUS_LEADER:
app.conn.broadcast_loggedout_node(app.id, app.topology)
app_logger.info(info_stamp() + "Logging out...")
report_logout(app.id)
os._exit(0)
def heartbeat():
while True:
try:
leader_ip, leaderport = decode_id(app.nodes[C.NODE_LEADER])
if app.status != C.STATUS_LEADER:
app.conn.heartbeat(leader_ip, leaderport)
except:
if app.nodes[C.NODE_LEADER]:
app_logger.info(info_stamp() + "%s lost connection",
app.nodes[C.NODE_LEADER])
app.nodes[C.NODE_LEADER] = None
finally:
time.sleep(C.SLEEP_TIME)
def process_welcome_json(json):
try:
app.nodes[C.NODE_BACK] = json[C.NODE_BACK]
except:
pass
try:
app.nodes[C.NODE_FRONT] = json[C.NODE_FRONT]
except:
pass
try:
app.nodes[C.NODE_LEADER] = json[C.NODE_LEADER]
if app.nodes[C.NODE_LEADER]:
app_logger.info(info_stamp() + 'New leader: %s',
app.nodes[C.NODE_LEADER])
except:
pass
def process_info_death(dead_node): # follower
app_logger.info(info_stamp() + "%s lost connection", dead_node)
def process_dead_node(dead_node):
app_logger.info(info_stamp() + "%s lost connection", dead_node)
remove_node(dead_node)
app.conn.broadcast_dead_node(dead_node, app.topology)
def process_info_new(new_node): # follower
app_logger.info(info_stamp() + "%s joined", new_node)
def process_new_node(new_node): # leader
app_logger.info(info_stamp() + "%s joined", new_node)
app.conn.broadcast_new_node(new_node, app.topology)
def process_info_loggedout(loggedout_node): # follower
app_logger.info(info_stamp() + "%s logged out", loggedout_node)
def process_logout(loggedout_node): # leader
# TODO report death to all nodes
app_logger.info(info_stamp() + "%s logged out", loggedout_node)
remove_node(loggedout_node)
app.conn.broadcast_loggedout_node(loggedout_node, app.topology)
