Tips for patiently waiting for connection.connect

Question

Tips for patiently waiting for connection.connect

Looking for a way to validate mysql connections.
What is the best approach to ensure the connection before proceeding in a function?

function _testConnection( _host, _user, _password, _database) {
  let isConnected = false;
  let connection = mysql.createConnection({
    host     : _host,
    user     : _user,
    password : _password,
    database : _database
  });

  connection.connect((err) => {
    isConnected = !err;
    connection.destroy();
  });

  // Is there a method to delay execution until the connection is established?
  return isConnected;
}

javascript vue.js electron

Answer 1

Answer №1

If you need to verify a connection using a Promise to receive the return value, you can do so by following this method:

function _testConnection( _host, _user, _password, _database) {
  return new Promise((resolve, reject) => {
    let status = false;
    let connection = mysql.createConnection({
      host: _host,
      user: _user,
      password: _password,
      database: _database
    });

    connection.connect((err) => {
      status = !err;
      connection.destroy();
      resolve(status)
    });
  })
}

To execute this function and retrieve the result, you can use the following code:

_testConnection(...).then(status => {
  console.log(status)
})

Answer 2

If you need to verify a connection using a Promise to receive the return value, you can do so by following this method:

function _testConnection( _host, _user, _password, _database) {
  return new Promise((resolve, reject) => {
    let status = false;
    let connection = mysql.createConnection({
      host: _host,
      user: _user,
      password: _password,
      database: _database
    });

    connection.connect((err) => {
      status = !err;
      connection.destroy();
      resolve(status)
    });
  })
}

To execute this function and retrieve the result, you can use the following code:

_testConnection(...).then(status => {
  console.log(status)
})

Tips for patiently waiting for connection.connect

Answer №1

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