模块管理优化

plugin_common/plugin_manager.py

@@ -13,7 +13,32 @@ from plugin_common.event_system import EventSystem, EventType
 
 
 class PluginManager:
-    """插件管理器，负责插件的加载、初始化、启动、停止和卸载"""
+    """插件管理器，负责加载、卸载、启动、停止插件"""
+    
+    # 单例实例
+    _instance = None
+    
+    @classmethod
+    def get_instance(cls, plugin_dir=None):
+        """获取单例实例
+        
+        Args:
+            plugin_dir: 插件目录，如果已有实例则忽略此参数
+            
+        Returns:
+            PluginManager实例
+        """
+        if cls._instance is None:
+            cls._instance = cls(plugin_dir=plugin_dir or "plugins")
+        return cls._instance
+    
+    def __new__(cls, *args, **kwargs):
+        """实现单例模式"""
+        if cls._instance is None:
+            cls._instance = super(PluginManager, cls).__new__(cls)
+            cls._instance._initialized = False
+        return cls._instance
+    
 
     def __init__(self, plugin_dir: str = "plugins"):
         """