Setup TypeORM connection loop.

setuptypeorm.ts

import { createConnection, Connection, getConnection } from "typeorm";
import { CONNECTION_STRING } from "./config";

const setupTypeORM = async () => {

    let connection: any = null;

    while (connection == undefined || !connection.isConnected)
    {
        try {

            connection = await createConnection({
                type: 'postgres',
                url: CONNECTION_STRING,
                entities: [
                    "src/entity/**/*.ts"
                ]
            });

            console.log("TypeORM connected.");
        }
        catch(err: any)
        {
            console.log("Fail to connect TypeORM.");
            await new Promise(resolve => setTimeout(resolve, 1000));
        }
    }
}

export default setupTypeORM;