def checkWorker(self, ip):
# assumes that msgClient at Leader has already started
# --
# createMsg(id, type, sName, rName, time, opName, args):
#68926bc9cb24244f919aa03a090aa535::R::sqdC/Fname::sqdL::2015-12-02 00:02:30::addClient:<Args>
print "Checking Worker..."
ret = False
msgId = u.genNewId()
type = "R"
sName = "sqdL/checkWorker"
rName = "sqdW"
now = datetime.now()
opName = "iamAlive"
args = tuple()
msg = u.createMsg(msgId, type, sName, rName, now, opName, args)
# send a message to Worker through msgClient
if ip not in self.workers.keys():
print "worker not available..."
else:
id, M = u.resolveMsg(msg)
self.workers[ip].outbox[id] = M
self.workers[ip].send(msg)
print "checkWorker: " + msg
for i in range(1,30):
if id in self.workers[ip].inbox.keys():
ret = self.workers[ip].inbox[id]
self.workers[ip].inbox.pop(id,0)
self.workers[ip].outbox.pop(id,0)
return ret
else:
time.sleep(2)
return ret
# if send is success, its good
# wait on its inbox to get an ack
# Return True on Success and False on failure
# its a blocking call
pass
def addClient(self, clientIp):
# adding client to cluster
# ---
print "Adding client: " + clientIp
existingClientsInConfig = self.leaderConfig["leader"]["clients"]
if clientIp not in existingClientsInConfig:
self.leaderConfig["leader"]["clients"].append(clientIp)
#update config
utils.writeJSON(os.path.join(self.configDir, self.configFile), self.leaderConfig)
existingClientsInServer = self.clients.keys()
if clientIp not in existingClientsInServer:
self.clients[clientIp] = msgClient(clientIp)
self.clients[clientIp].run()
# Check for client
print "Checking Client..."
ret = None
msgId = u.genNewId()
type = "R"
sName = "sqdL/addClient"
rName = "sqdC"
now = datetime.now()
opName = "iamClient"
# [TODO] for now always the last worker ip is send for testing purposes.
# it should be same worker on which addClient is envoked after getting infor from client
workerIp = self.leaderConfig["leader"]["workers"][-1]
args = (self.leaderConfig["leader"]["host"], self.leaderConfig["leader"]["cluster"], workerIp)
msg = u.createMsg(msgId, type, sName, rName, now, opName, args)
if clientIp not in self.clients.keys():
print "Client (%s) not available..." % (clientIp,)
else:
id, M = u.resolveMsg(msg)
self.clients[clientIp].outbox[id] = M
self.clients[clientIp].send(msg)
print "checkClient: " + msg
for i in range(1,40):
if id in self.clients[clientIp].inbox.keys():
ret = self.clients[clientIp].inbox[id]
self.clients[clientIp].inbox.pop(id,0)
self.clients[clientIp].outbox.pop(id,0)
print "Info from Client..", str(ret["args"])
break
else:
time.sleep(2)
# if got the necessary info from client
# pass it on to worker
if ret != None and len(ret["args"]) == 3:
argsToWorker = ret["args"]
ret = None
idW = u.genNewId()
type = "R"
sName = "sqdL/addClient"
rName = "sqdW"
now = datetime.now()
opName = "addClient"
msg = u.createMsg(idW, type, sName, rName, now, opName, argsToWorker)
print "keeping the message content in outbox..."
curId, M = u.resolveMsg(msg)
self.workers[workerIp].outbox[id] = M
self.workers[workerIp].send(msg)
print "Sending back to worker : ", msg
for i in range(1,30):
if id in self.workers[workerIp].inbox.keys():
ret = self.workers[workerIp].inbox[id]
self.workers[workerIp].inbox.pop(id,0)
self.workers[workerIp].outbox.pop(id,0)
print "Worker sent: ", ret
if ret == 1:
self.leaderConfig["leader"]["relation"][clientIp] = workerIp
#update config
utils.writeJSON(os.path.join(self.configDir, self.configFile), self.leaderConfig)
return ret
else:
time.sleep(2)
else:
print "Something went wrong while sending to worker..."
return ret
# Response handler for new worker coming in
# If workers name
pass