Crossbar.io and Redis Data Fetching Function

This function uses Crossbar.io and Redis to fetch data from a Redis store. It first creates a Crossbar instance and connects to Redis, then defines a worker component to handle messages, and finally returns the Crossbar instance.

Technology Stack : Crossbar, Redis

Code Type : Function

Code Difficulty : Intermediate

                
                    
def crossbar_redis_get(arg1, arg2):
    # This function uses Crossbar.io with Redis to fetch data from a Redis store

    from crossbar import Crossbar
    import redis

    # Create a Crossbar instance
    cb = Crossbar()

    # Connect to Redis
    r = redis.Redis(host=arg1, port=6379, db=0)

    # Define the worker to handle the request
    @cb.component
    class RedisWorker:
        def on_start(self):
            self.redis = r

        def on_message(self, msg):
            # Retrieve data from Redis using the provided key
            data = self.redis.get(msg['key'])
            # Send the data back to the client
            msg['data'] = data
            msg.ack()

    # Start the Crossbar application
    cb.start()

    # Return the Crossbar instance
    return cb