refactor router plugins

shards/mishards/router/factory.py

 import os
 import logging
-from functools import partial
-from utils.pluginextension import MiPluginBase as PluginBase
+from utils.plugins import BaseMixin
 
 logger = logging.getLogger(__name__)
-
-here = os.path.abspath(os.path.dirname(__file__))
-get_path = partial(os.path.join, here)
-
 PLUGIN_PACKAGE_NAME = 'mishards.router.plugins'
-plugin_base = PluginBase(package=PLUGIN_PACKAGE_NAME,
-                         searchpath=[get_path('./plugins')])
 
 
-class RouterFactory(object):
+class RouterFactory(BaseMixin):
     PLUGIN_TYPE = 'Router'
 
     def __init__(self, searchpath=None):
-        self.plugin_package_name = PLUGIN_PACKAGE_NAME
-        self.class_map = {}
-        searchpath = searchpath if searchpath else []
-        searchpath = [searchpath] if isinstance(searchpath, str) else searchpath
-        self.source = plugin_base.make_plugin_source(searchpath=searchpath,
-                                                     identifier=self.__class__.__name__)
-
-        for plugin_name in self.source.list_plugins():
-            plugin = self.source.load_plugin(plugin_name)
-            plugin.setup(self)
-
-    def on_plugin_setup(self, plugin_class):
-        name = getattr(plugin_class, 'name', plugin_class.__name__)
-        self.class_map[name.lower()] = plugin_class
-
-    def plugin(self, name):
-        return self.class_map.get(name, None)
-
-    def create(self, class_name, class_config=None, **kwargs):
-        if not class_name:
-            raise RuntimeError('Please specify router class_name first!')
-
-        this_class = self.plugin(class_name.lower())
-        if not this_class:
-            raise RuntimeError('{} Plugin \'{}\' Not Installed!'.format(self.PLUGIN_TYPE, class_name))
+        super().__init__(searchpath=searchpath, package_name=PLUGIN_PACKAGE_NAME)
 
-        router = this_class.create(class_config, **kwargs)
+    def _create(self, plugin_class, **kwargs):
+        router = plugin_class.create(**kwargs)
         return router

shards/mishards/router/plugins/file_based_hash_ring_router.py

@@ -51,7 +51,7 @@ class Factory(RouterMixin):
         return routing
 
     @classmethod
-    def create(cls, config, **kwargs):
+    def create(cls, **kwargs):
         conn_mgr = kwargs.pop('conn_mgr', None)
         if not conn_mgr:
             raise RuntimeError('Cannot find \'conn_mgr\' to initialize \'{}\''.format(self.name))