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This chapter is from the book

This chapter is from the book

Summary

Summary

Code that supports Singleton ensures that a class has only one instance and provides a global point of access to it. A common way to achieve this is through lazy-initialization of a singleton object, instantiating it only when the singleton is first needed. In a multi-threaded environment, you must take care to manage the collaboration of threads that may access a singleton’s methods and data at approximately the same time.

Uniqueness of a class’s or an object’s role does not imply that the Singleton pattern is in use. The _Singleton pattern centralizes authority in a single instance of a class.

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