November 2018
Intermediate to advanced
388 pages
9h 5m
English
Content preview from Kotlin for Enterprise Applications using Java EE
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Implementing the singleton pattern
The singleton pattern is one of the best-known design patterns. This pattern ensures that only one instance of a class exists throughout the application running inside the virtual machine.
A singleton is a class whose instance can be created only once. This exists until the application is up and running. A singleton class provides a single access point that has to be used to get the instance of the class. It restricts the number of instances of a class to one and controls the creation of instances of the class.
A singleton class in an application is used when managing things such as memory, connection pools, threads, logging, and the registry. This ensures the consistency, reliability, and correctness of ...
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