This is a class that can be used repeatedly to instantiate a class as a singleton without having to re-write the singleton pattern code for that specific class.
这是一个可用来创建单例类实例确不需要为每个特定的类重写单例模式代码的可重用的类。
The portlet service programming model is singleton-based, which means that there is no portlet entity specific instance of a portlet service.
Portlet服务编程模型是基于单一实例的，这意味着Portlet服务没有特定于Portlet实体的实例。
The portlet service programming model is singleton-based, which means that there is no portlet entity specific instance of a portlet service.
Portlet服务编程模型是基于单一实例的，这意味着Portlet服务没有特定于Portlet实体的实例。
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