Now that you have created your kafka consumer, you must create a handler for the messages this consumer receives. By default, a consumer is any callable. You can use an invokable class or a simple callback. Use the withHandler method to specify your handler:

$consumer = \Junges\Kafka\Facades\Kafka::createConsumer();

// Using callback:
$consumer->withHandler(function(\Junges\Kafka\Contracts\KafkaConsumerMessage $message) {
    // Handle your message here
});

Or, using a invokable class:

class Handler
{
    public function __invoke(\Junges\Kafka\Contracts\KafkaConsumerMessage $message){
        // Handle your message here
    }
}

$consumer = \Junges\Kafka\Facades\Kafka::createConsumer()->withHandler(new Handler)

The KafkaConsumerMessage contract gives you some handy methods to get the message properties:

• getKey(): Returns the Kafka Message Key
• getTopicName(): Returns the topic where the message was published
• getPartition(): Returns the kafka partition where the message was published
• getHeaders(): Returns the kafka message headers
• getBody(): Returns the body of the message
• getOffset(): Returns the offset where the message was published