Working with Redis Keyspace Notifications x Python

As we know redis is an in-memory data structure store, used as a distributed, in-memory key–value database, cache and message broker, with optional durability. since version 2.8.0, Redis provides a mechanism for client code to subscribe to a Pub/Sub channel that monitors events related to data in real time. it’s called keyspace notification

Keyspace notifications allow clients to subscribe to two channels in order to receive events affecting the Redis data set in some way. Examples of the events that are possible to receive are the following:

By default, keyspace events notifications are disabled. We can enable them in redis.conf or redis-cli as below

Setting the parameter to the empty string disables notifications. In order to enable the feature a non-empty string is used, composed of multiple characters, where every character has a special meaning according to the following table:

Then, let’s check we can subscribe for a pattern by using PSUBSCRIBE redis command

First let’s install Redis package

Listener

Publisher

Now let’s run python file

after 10 second (expTime), your message will’be processed, and In the redis server terminal you will see your key has been sent:

Congratulations, your event with redis keyspace notification is ready !

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