11/1/2023 0 Comments Singleton design pattern c![]() Let us first discuss the code of first case Singleton which is like: Once a client has got the object, no other client can have an object. While the second case Singleton can be used in locking mechanisms. Hence each client is given a reference to a single shared object to operate on. The second solution says that the constructor should be public (as it appears in most cases) but once an object has been instantiated, an exception should be thrown for each successive constructor call thus limiting the class to only one object.įirst case Singleton can be used in a data repository or data collection where creation of more than one object can be resource wastage. ![]() A number of clients can be awarded the reference to such shared object. The first solution says that there should be only one shared object and reference to that object should be available only through static method like GetInstance() while making the constructor private. There are at least two solutions or scenario for implementing Singleton Class. Singleton Design Pattern addresses to such situation by providing a design for such classes (known as Singleton class). There are times, when one need to have a class which can be only instantiated once.
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