def _watch_configurators(self, event):
"""
监测某个interface中provider的权重的变化信息
:param event:
:return:
"""
path = event.path
logger.debug('zookeeper node changed: {}'.format(path))
interface = path.split('/')[2]
# 试图从配置中取出权重相关的信息
configurators = self.zk.get_children(
DUBBO_ZK_CONFIGURATORS.format(interface),
watch=self._watch_configurators)
if configurators:
configurators = list(map(parse_url, configurators))
conf = {}
for configurator in configurators:
conf[configurator['host']] = configurator['fields'].get(
'weight', 100)
logger.debug('{} configurators: {}'.format(interface, conf))
self.weights[interface] = conf
else:
logger.debug('No configurator for interface {}')
self.weights[interface] = {}
def __resubscribe(self):
"""
由于与Zookeeper的连接断开，所以需要重新订阅消息
:return:
"""
for interface in self.hosts.keys():
self.zk.get_children(DUBBO_ZK_PROVIDERS.format(interface), watch=self._watch_children)
self.zk.get_children(DUBBO_ZK_CONFIGURATORS.format(interface), watch=self._watch_configurators)
def _get_configurators_from_zk(self, interface):
"""
试图从配置中取出权重相关的信息
:param interface:
:return:
"""
configurators = self.zk.get_children(DUBBO_ZK_CONFIGURATORS.format(interface), watch=self._watch_configurators)
if configurators:
configurators = map(parse_url, configurators)
conf = {}
for configurator in configurators:
conf[configurator['host']] = configurator['fields'].get('weight', 100) # 默认100
self.weights[interface] = conf