How to implement integration of a feedback service with a moderation service: via Webhook or Kafka? Pros and cons?

The choice between Webhook and Kafka for integrating the feedback service with the moderation service depends on system requirements.

Webhook:

• A simple notification method — the feedback service sends an HTTP request to the moderation service's endpoint when a new review appears.
• Pros: easy to implement, low latency, does not require additional infrastructure.
• Cons: unreliable delivery (if the moderation service is unavailable, the notification may be lost), complexity in scaling and reprocessing.

Kafka:

• Using a message broker to transmit review events.
• Pros: high reliability, guaranteed delivery, scalability, support for re-reading messages, asynchronous.
• Cons: complexity in configuring and maintaining infrastructure, delay due to asynchrony.

If reliability and scalability are important, Kafka is better. If simple and fast integration with a small volume of data is needed, Webhook is suitable.