How to create custom key-space-events on redis?

@haylee.mertz 

To create custom key-space-events on Redis, you can use the CONFIG command to set up notifications for specific key events. Here's a general outline of the steps you can take:

1. Open your Redis CLI or client application to interact with Redis.
2. Use the CONFIG SET command to enable notifications for specific types of key events. For example, to receive notifications for key expiration events, you can use the following command: CONFIG SET notify-keyspace-events Ex The "Ex" parameter in this command stands for key expiration events. You can customize this parameter to specify different types of key events, such as "E" for key events in general, "g" for generic commands, and so on. Refer to the Redis documentation for more information on the available options.
3. Once you have configured the notifications for the desired key events, you can start listening for these events using the built-in Pub/Sub feature in Redis. You can use the PSUBSCRIBE command to subscribe to specific channels related to the key events you are interested in. For example, to subscribe to all key events with a specific pattern, you can use the following command: PSUBSCRIBE __keyspace@0__:your_pattern_here* Replace "your_pattern_here*" with the desired pattern to match specific keys or key namespaces.
4. You can now receive notifications for the custom key-space-events that you have configured in Redis. Whenever a key event that matches your specified criteria occurs, Redis will publish a message to the relevant Pub/Sub channel, which you can then process or handle accordingly in your application.

Note: Make sure to configure key events and subscriptions carefully to avoid excessive notifications and potential performance impacts on your Redis server. Always refer to the official Redis documentation for best practices and guidelines on working with key-space-events and custom notifications.