修改为在设置的gateway清单中进行加载，减少轮询目录的耗时。

vn.trader/gateway/__init__.py

@@ -11,9 +11,26 @@ import traceback
 # 用来保存Gateway类的字典
 GATEWAY_DICT = {}
 
+# modified by Incense Lee
+# 只加载指定的gateway清单
+
 # 需要加载的gateway清单
 load_gateways = ['ctpGateway']
 
+# 逐一加载
+for load_gateway in load_gateways:
+    # 模块名称需要上前缀
+    moduleName = 'gateway.' + load_gateway
+    print u'load Module:{0}'.format(moduleName)
+    try:
+        # 使用importlib动态载入模块，并保存到字典中
+        module = importlib.import_module(moduleName)
+        GATEWAY_DICT[module.gatewayName] = module
+    except Exception as ex:
+        print u'Load {0} exception:{1}'.format(moduleName, ex)
+        traceback.print_exc()
+
+"""
 # 获取目录路径
 path = os.path.abspath(os.path.dirname(__file__))
 
@@ -41,3 +58,4 @@ for root, subdirs, files in os.walk(path):
                 print u'Load {0} exception:{1}'.format(moduleName, ex)
                 traceback.print_exc()
 
+"""