[MultiDB]: use python class composition to avoid confusion in base class (sonic-net#74)

Author: dzhangalibaba

src/swsssdk/dbconnector.py

@@ -223,9 +223,9 @@ def get_separator(db_name, namespace=None):
         SonicDBConfig.db_name_validation(db_name, namespace)
         return SonicDBConfig._sonic_db_config[namespace]["DATABASES"][db_name]["separator"]
 
-class SonicV2Connector(DBInterface):
+class SonicV2Connector(object):
     def __init__(self, use_unix_socket_path=False, namespace=None, **kwargs):
-        super(SonicV2Connector, self).__init__(**kwargs)
+        self.dbintf = DBInterface(**kwargs)
         self.use_unix_socket_path = use_unix_socket_path
 
         """If the user don't give the namespace as input, it refers to the local namespace 
@@ -244,19 +244,19 @@ def __init__(self, use_unix_socket_path=False, namespace=None, **kwargs):
 
     def connect(self, db_name, retry_on=True):
         if self.use_unix_socket_path:
-            self.redis_kwargs["unix_socket_path"] = self.get_db_socket(db_name)
-            self.redis_kwargs["host"] = None
-            self.redis_kwargs["port"] = None
+            self.dbintf.redis_kwargs["unix_socket_path"] = self.get_db_socket(db_name)
+            self.dbintf.redis_kwargs["host"] = None
+            self.dbintf.redis_kwargs["port"] = None
         else:
-            self.redis_kwargs["host"] = self.get_db_hostname(db_name)
-            self.redis_kwargs["port"] = self.get_db_port(db_name)
-            self.redis_kwargs["unix_socket_path"] = None
+            self.dbintf.redis_kwargs["host"] = self.get_db_hostname(db_name)
+            self.dbintf.redis_kwargs["port"] = self.get_db_port(db_name)
+            self.dbintf.redis_kwargs["unix_socket_path"] = None
         db_id = self.get_dbid(db_name)
-        super(SonicV2Connector, self).connect(db_id, retry_on)
+        self.dbintf.connect(db_id, retry_on)
 
     def close(self, db_name):
         db_id = self.get_dbid(db_name)
-        super(SonicV2Connector, self).close(db_id)
+        self.dbintf.close(db_id)
 
     def get_db_list(self):
         return SonicDBConfig.get_dblist(self.namespace)
@@ -281,42 +281,42 @@ def get_db_separator(self, db_name):
 
     def get_redis_client(self, db_name):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).get_redis_client(db_id)
+        return self.dbintf.get_redis_client(db_id)
 
     def publish(self, db_name, channel, message):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).publish(db_id, channel, message)
+        return self.dbintf.publish(db_id, channel, message)
 
     def expire(self, db_name, key, timeout_sec):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).expire(db_id, key, timeout_sec)
+        return self.dbintf.expire(db_id, key, timeout_sec)
 
     def exists(self, db_name, key):
         db_id = self.get_dbid(db_name)
-        return  super(SonicV2Connector, self).exists(db_id, key)
+        return self.dbintf.exists(db_id, key)
 
     def keys(self, db_name, pattern='*', *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).keys(db_id, pattern, *args, **kwargs)
+        return self.dbintf.keys(db_id, pattern, *args, **kwargs)
 
     def get(self, db_name, _hash, key, *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).get(db_id, _hash, key, *args, **kwargs)
+        return self.dbintf.get(db_id, _hash, key, *args, **kwargs)
 
     def get_all(self, db_name, _hash, *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).get_all(db_id, _hash, *args, **kwargs)
+        return self.dbintf.get_all(db_id, _hash, *args, **kwargs)
 
     def set(self, db_name, _hash, key, val, *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).set(db_id, _hash, key, val, *args, **kwargs)
+        return self.dbintf.set(db_id, _hash, key, val, *args, **kwargs)
 
     def delete(self, db_name, key, *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        return super(SonicV2Connector, self).delete(db_id, key, *args, **kwargs)
+        return self.dbintf.delete(db_id, key, *args, **kwargs)
 
     def delete_all_by_pattern(self, db_name, pattern, *args, **kwargs):
         db_id = self.get_dbid(db_name)
-        super(SonicV2Connector, self).delete_all_by_pattern(db_id, pattern, *args, **kwargs)
+        self.dbintf.delete_all_by_pattern(db_id, pattern, *args, **kwargs)
 
     pass