Create "ensure" method

[ORESoftware]

Motivation

Allow node.js routines to reconnect if not connected

Basic Code Example

this is a good pattern!
the code before:

const client = redis.createClient({
  url: 'redis://localhost:6379'
});

client.connect().catch(err => {
  log.error('redis could not connect:', err);
});

async function performOp(key: string, value: string): Promise<bar> {
  try {

    const result = await client.set(key, value, {
      NX: true, // Only set the key if it does not already exist
    });

the code after:

const client = redis.createClient({
  url: 'redis://localhost:6379'
});

client.connect().catch(err => {
  log.error('redis could not connect:', err);
});

(client as any).ensure = async () => {   // <<< this one
  if (client.isOpen) {
    return;
  }
  return client.connect();
}


async function performOp(key: string, value: string): Promise<bar> {
  try {

    await (client as any).ensure();  // <<< THIS ONE

    const result = await client.set(key, value, {
      NX: true, // Only set the key if it does not already exist
    });

this is a really good pattern that has served me well in multiple languages/runtimes over the years. Sure we might still get an error, but it will be a simple subset of the existing way.

thanks