Umple Singleton Pattern
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Singleton Pattern
Use the Singleton keyword to mark a class as a singleton class. The code ensures that only one object of the class is instantiated at runtime.
For more details on the Singleton pattern, see this Wikipedia page.
Example
class Airline
{
singleton;
}
Load the above code into UmpleOnline
Syntax
softwarePattern- : [[isA]] | [[singleton]] | [[immutable]] | [[keyDefinition]] | [[codeInjection]]
// A class that can have only one instance SingletonPattern
singleton- : [=singleton] ;