class MasterDetector(object):
def __init__(self, uri, agent):
self.uri = uri
self.agent = agent
self.zk = ZKClient(uri, 10)
self.masterSeq = None
def choose(self, children):
children = [child for child in children if child != 'log_replicas']
if not children:
self.agent.onNoMasterDetectedMessage()
return True
masterSeq = min(children)
if masterSeq == self.masterSeq:
return True
self.masterSeq = masterSeq
DataWatch(self.zk, '/' + masterSeq, self.notify)
return True
def notify(self, master_addr, _):
self.agent.onNewMasterDetectedMessage(master_addr)
return False
def start(self):
adjust_zk_logging_level()
self.zk.start()
try:
ChildrenWatch(self.zk, '', self.choose)
except ZookeeperError:
self.agent.onNoMasterDetectedMessage()
self.stop()
def stop(self):
try: self.zk.stop()
except: pass
class MasterDetector(object):
def __init__(self, uri, agent):
self.uri = uri
self.agent = agent
self.zk = ZKClient(uri, 10)
self.masterSeq = None
def choose(self, children):
if not children:
self.agent.onNoMasterDetectedMessage()
return True
masterSeq = min(children)
if masterSeq == self.masterSeq:
return True
self.masterSeq = masterSeq
DataWatch(self.zk, '/' + masterSeq, self.notify)
return True
def notify(self, master_addr, _):
self.agent.onNewMasterDetectedMessage(master_addr)
return False
def start(self):
adjust_zk_logging_level()
self.zk.start()
try:
ChildrenWatch(self.zk, '', self.choose)
except ZookeeperError:
self.agent.onNoMasterDetectedMessage()
self.stop()
def stop(self):
try: self.zk.stop()
except: pass
def __init__(self, uri, agent):
self.uri = uri
self.agent = agent
self.zk = ZKClient(uri, 10)
self.masterSeq = None
def __init__(self, uri, agent):
self.uri = uri
self.agent = agent
self.zk = ZKClient(uri, 10)
self.masterSeq = None
