first upload

README.md

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+### Python Dubbo Client
+
+##Python调用Dubbo接口的jsonrpc协议
+请使用dubbo-rpc-jsonrpc
+
+##在客户端实现负载均衡，服务发现
+通过注册中心的zookeeper，获取服务的注册信息
+然后通过代理实现负载均衡算法，调用服务端

dubbo_client/__init__.py

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+__author__ = 'caozupeng'

dubbo_client/config.py

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+__author__ = 'caozupeng'

dubbo_client/registry.py

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+# encoding=utf-8
+import urllib
+from urlparse import urlparse, parse_qsl
+
+from kazoo.protocol.states import KazooState
+
+
+__author__ = 'caozupeng'
+from kazoo.client import KazooClient
+import logging
+
+logging.basicConfig()
+zk = KazooClient(hosts='172.19.65.33:2181', read_only=True)
+service_provides = {}
+
+
+def state_listener(state):
+    if state == KazooState.LOST:
+        # Register somewhere that the session was lost
+        print 'session lost'
+    elif state == KazooState.SUSPENDED:
+        # Handle being disconnected from Zookeeper
+        print 'disconnect from zookeeper'
+    else:
+        # Handle being connected/reconnected to Zookeeper
+        print 'connected'
+
+
+zk.add_listener(state_listener)
+
+
+class JsonProvide(object):
+    protocol = 'jsonrpc'
+    location = ''
+    path = ''
+    ip = '127.0.0.1'
+    port = '9090'
+
+    def __init__(self, url):
+        result = urlparse(url)
+        self.protocol = result[0]
+        self.location = result[1]
+        self.path = result[2]
+        if self.location.find(':') > -1:
+            self.ip, self.port = result[1].split(':')
+        params = parse_qsl(result[4])
+        for key, value in params:
+            # url has a default.timeout property, but it can not add in python object
+            # so keep the last one
+            pos = key.find('.')
+            if pos > -1:
+                key = key[pos + 1:]
+            print key
+            self.__dict__[key] = value
+
+
+def node_listener(event):
+    print event
+
+
+def add_provider_listener(provide_name):
+    children = zk.get_children('{0}/{1}/{2}'.format('dubbo', provide_name, 'providers'), watch=node_listener)
+    for child_node in children:
+        url = urllib.unquote(child_node).decode('utf8')
+        if url.startswith('jsonrpc'):
+            provide = JsonProvide(url)
+            service_key = service_provides.get(provide.interface)
+            if service_key:
+                service_key[provide.location] = provide
+            else:
+                service_provides[provide.interface] = {provide.location: provide}
+
+
+zk.start()
+
+if __name__ == '__main__':
+    zk.start()
+    if zk.exists("/dubbo"):
+        # Print the version of a node and its data
+        # children = zk.get_children("/dubbo")
+        # print "There are {0} children".format(len(children))
+        # for node in children:
+        # print node
+        add_provider_listener('com.ofpay.demo.api.UserProvider')
+

dubbo_client/rpc.py

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+import httplib
+import json
+
+from dubbo_client.registry import service_provides, add_provider_listener
+
+
+__author__ = 'caozupeng'
+
+
+def raw_client(service_interface, app_params):
+    headers = {"Content-type": "application/json-rpc",
+               "Accept": "text/json"}
+    provides = service_provides.get(service_interface, ())
+    if len(provides) > 0:
+        location, first = provides.items().pop()
+        h1 = httplib.HTTPConnection(first.ip, port=int(first.port))
+        h1.request("POST", first.path, json.dumps(app_params), headers)
+        response = h1.getresponse()
+        return response.read(), None
+    else:
+        return None, 'can not find the provide of {0}'.format(service_interface)
+
+
+if __name__ == '__main__':
+    app_params = {
+        "jsonrpc": "2.0",
+        "method": "getUser",
+        "params": ["A001"],
+        "id": 1
+    }
+    service_interface = 'com.ofpay.demo.api.UserProvider'
+    add_provider_listener(service_interface)
+    ret, error = raw_client(service_interface, app_params)
+    if not error:
+        print json.loads(ret, encoding='utf-8')

dubbo_client/tools.py

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+#encoding=utf-8
+__author__ = 'caozupeng'

test_dubbo_client/__init__.py

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+__author__ = 'caozupeng'