Singleton Pattern is a design pattern that allow a class to be instantiated only once. The benefit of Singleton is to be ensure that there is only one and the same instance of object is called every time. Ruby also support Singleton Pattern.
In order to create a singleton class in Ruby,
Singleton module needs to be included.
Check out the code below:
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The example above created a ruby singleton class called
OpensrsServer, with an instance method called
connection. This class is responsible for creating a connection object using
In order to instantiate an object with singleton class in Ruby, we need to use
.instance method rather than
No matter how many time
OpenSRSServer.instance get called, the object returned will be the same.