| # coding=utf-8 |
| import os |
| |
| from dubbo_client.config import ApplicationConfig |
| |
| |
| __author__ = 'caozupeng' |
| import urllib |
| |
| from kazoo.protocol.states import KazooState |
| from kazoo.client import KazooClient |
| |
| from dubbo_client.common import ServiceURL |
| |
| |
| class Registry(object): |
| def register(self, interface, **kwargs): |
| """ |
| 客户端注册到注册中心，亮出自己的身份 |
| :param interface: |
| :param kwargs: |
| :return: |
| """ |
| pass |
| |
| def subscribe(self, interface, **kwargs): |
| """ |
| 监听注册中心的服务上下线 |
| :param provide_name: 类似com.ofpay.demo.api.UserProvider这样的服务名 |
| :param kwargs: version , group |
| :return: 无返回 |
| """ |
| pass |
| |
| def get_provides(self, provide_name, default=None, **kwargs): |
| """ |
| 获取已经注册的服务URL对象 |
| :param provide_name: com.ofpay.demo.api.UserProvider |
| :param default: |
| :return: 返回一个dict的服务集合 |
| """ |
| pass |
| |
| |
| class ZookeeperRegistry(Registry): |
| """ |
| 所有注册过的服务端将在这里 |
| interface=com.ofpay.demo.DemoService |
| location = ip:port/url 比如 172.19.20.111:38080/com.ofpay.demo.DemoService2 |
| providername = servicename|version|group |
| dict 格式为{interface:{providername:{ip+port:service_url}}} |
| |
| """ |
| _service_provides = {} |
| _app_config = ApplicationConfig('default_app') |
| _connect_state = 'UNCONNECT' |
| |
| |
| def __init__(self, zk_hosts, application_config=None): |
| if application_config: |
| self._app_config = application_config |
| self.__zk = KazooClient(hosts=zk_hosts) |
| self.__zk.add_listener(self.__state_listener) |
| self.__zk.start() |
| |
| def __state_listener(self, state): |
| if state == KazooState.LOST: |
| # Register somewhere that the session was lost |
| self._connect_state = state |
| elif state == KazooState.SUSPENDED: |
| # Handle being disconnected from Zookeeper |
| # print 'disconnect from zookeeper' |
| self._connect_state = state |
| else: |
| # Handle being connected/reconnected to Zookeeper |
| # print 'connected' |
| self._connect_state = state |
| |
| def __event_listener(self, event): |
| """ |
| node provides上下线的监听回调函数 |
| :param event: |
| :return: |
| """ |
| self._do_event(event) |
| |
| def __to_key(self, interface, versioin, group): |
| return '{0}|{1}|{2}'.format(interface, versioin, group) |
| |
| def __handler_nodes(self, interface, nodes): |
| """ |
| 将zookeeper中查询到的服务节点列表加入到一个dict中 |
| zookeeper中保持的节点url类似如下 |
| jsonrpc://192.168.2.1:38080/com.ofpay.demo.api.UserProvider? |
| anyhost=true&application=demo-provider&default.timeout=10000&dubbo=2.4.10& |
| environment=product&interface=com.ofpay.demo.api.UserProvider& |
| methods=getUser,queryAll,queryUser,isLimit&owner=wenwu&pid=61578& |
| side=provider×tamp=1428904600188 |
| 首先将url转为ServiceUrl对象，然保持到缓存中 |
| :param nodes: 节点列表 |
| :return: 不需要返回 |
| """ |
| # 如果已经存在，首先删除原有的服务的集合 |
| if interface in self._service_provides: |
| del self._service_provides[interface] |
| for child_node in nodes: |
| node = urllib.unquote(child_node).decode('utf8') |
| if node.startswith('jsonrpc'): |
| service_url = ServiceURL(node) |
| key = self.__to_key(service_url.interface, service_url.version, service_url.group) |
| second_dict = self._service_provides.get(interface) |
| if second_dict: |
| # 获取最内层的nest的dict |
| inner_dict = second_dict.get(key) |
| if inner_dict: |
| inner_dict[service_url.location] = service_url |
| else: |
| second_dict[key] = {service_url.location: service_url} |
| else: |
| # create the second dict |
| self._service_provides[interface] = {key: {service_url.location: service_url}} |
| |
| def _do_event(self, event): |
| # event.path 是类似/dubbo/com.ofpay.demo.api.UserProvider/providers 这样的 |
| # 如果要删除，必须先把/dubbo/和最后的/providers去掉 |
| provide_name = event.path[7:event.path.rfind('/')] |
| if event.state == 'CONNECTED': |
| children = self.__zk.get_children(event.path, watch=self.__event_listener) |
| self.__handler_nodes(provide_name, children) |
| if event.state == 'DELETED': |
| children = self.__zk.get_children(event.path, watch=self.__event_listener) |
| self.__handler_nodes(provide_name, children) |
| |
| def register(self, interface, **kwargs): |
| ip = self.__zk._connection._socket.getsockname()[0] |
| params = { |
| 'interface': interface, |
| 'application': self._app_config.name, |
| 'application.version': self._app_config.version, |
| 'category': 'consumer', |
| 'dubbo': 'dubbo-client-py-1.0.0', |
| 'environment': self._app_config.environment, |
| 'interface': interface, |
| 'method': '', |
| 'owner': self._app_config.owner, |
| 'side': 'consumer', |
| 'pid': os.getpid(), |
| 'version': '1.0' |
| } |
| url = 'consumer://{0}/{1}?{2}'.format(ip, interface, urllib.urlencode(params)) |
| # print urllib.quote(url, safe='') |
| |
| consumer_path = '{0}/{1}/{2}'.format('dubbo', interface, 'consumers') |
| self.__zk.create(consumer_path + '/' + urllib.quote(url, safe=''), ephemeral=True) |
| |
| def subscribe(self, interface, **kwargs): |
| """ |
| 监听注册中心的服务上下线 |
| :param interface: 类似com.ofpay.demo.api.UserProvider这样的服务名 |
| :return: 无返回 |
| """ |
| version = kwargs.get('version', '') |
| group = kwargs.get('group', '') |
| children = self.__zk.get_children('{0}/{1}/{2}'.format('dubbo', interface, 'providers'), |
| watch=self.__event_listener) |
| # 全部重新添加 |
| self.__handler_nodes(interface, children) |
| |
| def get_provides(self, interface, **kwargs): |
| """ |
| 获取已经注册的服务URL对象 |
| :param interface: com.ofpay.demo.api.UserProvider |
| :param default: |
| :return: 返回一个dict的服务集合 |
| """ |
| group = kwargs.get('group', '') |
| version = kwargs.get('version', '') |
| key = self.__to_key(interface, version, group) |
| second = self._service_provides.get(interface, {}) |
| return second.get(key, {}) |
| |
| |
| if __name__ == '__main__': |
| zk = KazooClient(hosts='192.168.59.103:2181') |
| zk.start() |
| parent_node = '{0}/{1}/{2}'.format('dubbo', 'com.ofpay.demo.api.UserProvider', 'consumers') |
| nodes = zk.get_children(parent_node) |
| for child_node in nodes: |
| node = urllib.unquote(child_node).decode('utf8') |
| print node |
| # zk.delete(parent_node+'/'+child_node, recursive=True) |
