Good Singleton

good_singleton.ts

class Redis {
    private static instance: Redis;
    private id: number;
    private base_url: string;
    private port: number;
    private constructor(base_url: string, port: number = 6379) {
        this.base_url = base_url;
        this.port = port;
        this.id = new Date().getTime();
    }
    static getInstance(base_url: string, port: number = 6379) {
        if (!this.instance) {
            this.instance = new Redis(base_url, port);
        }
        return this.instance;
    }
    connect() {
        console.log(`${this.base_url}:${this.port}`);
        console.log("Connected Redis, instance id:", this.id)
    }
    execQuery() {
        console.log("Executed query!")
    }
    //Getter and setters..
}