def startSlaveNode(cFile, cDict):
"""
startSlaveNode(cFile: string, cDict (string?string list) dict[string]) -> None
startSlaveNode spins up an RMI server on the local machine, puts a fsShell
and pinger inside of it and connects it to the master server.
"""
ip, port = get(cFile, cDict, "ADDRESS", 2, addressMapper)
masterIp, masterPort = get(cFile, cDict, "MASTER_ADDRESS", 2, addressMapper)
dfsRoot = get(cFile, cDict, "DFS_ROOT", 1)
tmpRoot = get(cFile, cDict, "TMP_ROOT", 1)
nodeID = get(cFile, cDict, "NODE_ID", 1)
if not os.path.exists(dfsRoot) or not os.path.isdir(dfsRoot):
configKeyError(cFile, "DFS_ROOT", dfsRoot)
if not os.path.exists(tmpRoot) or not os.path.isdir(tmpRoot):
configKeyError(cFile, "TMP_ROOT", tmpRoot)
deleteWithPermission(dfsRoot)
deleteWithPermission(tmpRoot)
localRmi = rmiUI.RMIServer(ip, port)
remoteRmi = rmiUI.getServer(masterIp, masterPort)
fsShell = distributedFile.FileSystemShell(dfsRoot, tmpRoot, nodeID)
pinger = link.Pinger()
transferer = transfer.Transferer(fsShell)
mapHandler = mapReduce.MapReduceHandler(fsShell)
localRmi.register(fsShell, "fsShell")
localRmi.register(pinger, "pinger")
localRmi.register(transferer, "transferer")
localRmi.register(mapHandler, "mapHandler")
def addSelfToManager():
try:
managerID = remoteRmi.IDFromName("dfsManager")
dfsManager = remoteRmi.get(managerID)
dfsManager.addRmiServer(ip, port, nodeID)
except:
localRmi.close()
raise
worker = threading.Thread(target=addSelfToManager, args=())
# This is _not_ a race condition. You have tried to "fix" this four times
# already. Give it a break.
worker.start()
print "Node started successfully."
localRmi.monitor()
while RUNNING:
tokens = getUserInput().split(" ")
command, args = tokens[0], tokens[1:]
if command not in COMMAND_MAP:
print "Command '%s' not recognized." % command
else:
try:
COMMAND_MAP[command](dfsManager, configDict, args)
except BaseException as exn:
traceback.print_exc()
if __name__ == "__main__":
if len(sys.argv) != 2:
printBasicHelp()
sys.exit(1)
elif len(sys.argv) in ("--help", "-help"):
printVerboseHelp()
sys.exit(0)
configFile = sys.argv[1]
configDict = configUtils.parse(configFile)
masterIP, masterPort = configDict["ADDRESS"]
masterRMI = rmiUI.getServer(masterIP, int(masterPort))
dfsManagerID = masterRMI.IDFromName("dfsManager")
dfsManager = masterRMI.get(dfsManagerID)
mainLoop(dfsManager, configDict)
