Utility

Singleton Management

SingletonManager is a utility class that allows registering, retrieving, and unregistering singletons.

Registration, Retrieval, and Unregistration (without arguments)

import { SingletonManager } from '@basalt-lab/basalt-helper/util';

// Example class with a static counter allow to see the number of instances created of this class
class Example {
    private static _count = 0;
    private readonly _id: number;

    public constructor() {
        Example._count += 1;
        this._id = Example._count;
        console.log(`Example created with ID: ${this._id}`);
    }

    public sayHello(): void {
        console.log(`Hello from instance ${this._id}!`);
    }
}

// allows to register the class Example as a singleton
SingletonManager.register('Example', Example);

// Get the singleton instance of Example
SingletonManager.get<Example>('Example').sayHello();
SingletonManager.get<Example>('Example').sayHello();

// allows to unregister the class Example as a singleton
SingletonManager.unregister('Example');

node example.jsExampleSingleton created with ID: 1
Hello from instance 1!
Hello from instance 1!

Registration, Retrieval, and Unregistration (with arguments)

import { SingletonManager } from '@basalt-lab/basalt-helper/util';

// Example class with a static counter allow to see the number of instances created of this class
class Example {
    private static _count = 0;
    private readonly _id: number;

    public constructor(name: string) {
        Example._count += 1;
        this._id = Example._count;
        console.log(`Example created with ID: ${this._id} and name: ${name}`);
    }

    public sayHello(): void {
        console.log(`Hello from instance ${this._id}!`);
    }
}

// allows to register the class Example as a singleton
SingletonManager.register('Example', Example, 'John Doe');

// Get the singleton instance of Example
SingletonManager.get<Example>('Example').sayHello();
SingletonManager.get<Example>('Example').sayHello();

// allows to unregister the class Example as a singleton
SingletonManager.unregister('Example');

node example.jsExampleSingleton created with ID: 1 and name: John Doe
Hello from instance 1!
Hello from instance 1!