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node-redis/examples/check-connection-status.js
Simon Prickett da3face951 Add connection status check example and documentation. (#2340)
* Adds example for transactions with arbitrary commands.

* Formatting.

* Adds isReady doc and example for isReady and isOpen.

* Improved example.

* Added isOpen explanation.

* Removed example from a different PR.
2022-12-13 15:19:45 -05:00

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JavaScript

// Check the connection status of the Redis client instance.
import { createClient } from 'redis';
const client = createClient();
console.log('Before client.connect()...');
// isOpen will return False here as the client's socket is not open yet.
// isReady will return False here, client is not yet ready to use.
console.log(`client.isOpen: ${client.isOpen}, client.isReady: ${client.isReady}`);
// Begin connection process...
const connectPromise = client.connect();
console.log('After client.connect()...');
// isOpen will return True here as the client's socket is open now.
// isReady will return False here as the promise hasn't resolved yet.
console.log(`client.isOpen: ${client.isOpen}, client.isReady: ${client.isReady}`);
await connectPromise;
console.log('Afer connectPromise has resolved...');
// isOpen will return True here as the client's socket is open now.
// isReady will return True here, client is ready to use.
console.log(`client.isOpen: ${client.isOpen}, client.isReady: ${client.isReady}`);
await client.quit();