指向记录器类的指针是否为所有其他类提供？ [英] Pointer to a logger class provide for all other classes?

问题描述

我在我的C ++应用程序中有一个Logger类。这个类有像 writeDebug（std :: string& str）这样的公共方法，可以写入调试输出文件，该对象正在由第一个主类在应用程序启动时创建，并且作为 Logger * myLogger; 对象存储。

由于我还有其他类，我想为这些类提供这种日志功能。

目前我使用myLogger指针指向其结构中的toher类，所有其他类在创建时存储这个非常相同的Logger指针 - >所有其他类都有 Logger * myLogger 指针存储：

  Other_XY_Class :: Other_XY_Class（Logger * logger，...）
：localLoggerPtr {logger} {// ..} 
  

==> localLoggerPtr（在类Other_XY_Class中）== myLogger（在主应用程序类中）

我可以想象有一个更方便/

因为你只有一个实例，为什么不使用Singleton呢？

这行代码：

  class foo {
 private：
 void bar（）; 
 
 static foo实例; 
 
 public：
 static void Bar（）{Instance.bar（）; } 
} 
  

I have a Logger class in my C++ application. This class has public methods like writeDebug(std::string & str) , can write to a debug output file and it works for me very good. The object is being created on application start by the first main class and there it is stored as a Logger * myLogger; object.

Since I have other classes as well, I would like to provide this logging functionality to those classes as well.

Currently I oberhead the myLogger pointer to toher classes in their contructor, and all the other classes store this very same Logger pointer when being created --> all other classes has this Logger * myLogger pointer stored:

Other_XY_Class::Other_XY_Class(Logger * logger, ...) 
: localLoggerPtr{logger} { //.. }

==> localLoggerPtr (in class Other_XY_Class) == myLogger (in main application class)

I can imagine that there is a more convenient / elegant way to handle that ?

解决方案

Since you only have one instance, why not use a Singleton for that?

Something along this lines:

class foo {
private:
   void bar();

   static foo Instance;

public:
  static void Bar() { Instance.bar(); }
}

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