node.js mySQL connection via a singleton

Question

I\'m using a singleton pattern for mySQL connections in node.js, there\'s one and only one connection for the whole application to use, my concern is if there\'s some timeout s

Answer 1

This is actually a MySQL concern and not Node.js. You can use the property wait_timeout of the MySQL to increase the number of time to keep the connection opened.

Check more details about this property here

Below is a code example for your singleton that will create a new connection when the current one is closed. In the scenario, you will never have more than 1 connection active if you always use the App Singleton to get the connection:

getConnection: function() {
    var app = common.model.connections.App.getInstance();
    if(!app.connection.isConnected()){
       //connect if connection is closed.
       app.connection.connect();
    }
    return app.connection;
}