Microservices use RabbitMQ for asynchronous communication.
RabbitMQ is a message broker. It helps services send messages without waiting.
- One service can send a message to a queue.
- Another service can read the message later.
This makes the system reliable and scalable. Services don’t block each other.
In this project, I showed a simple RabbitMQ producer and consumer.
You can try it here: https://leopard.lmq.cloudamqp.com/
Different exchange types decide how messages go:
| Exchange Type | Routing Key Use | Where Message Goes | Use |
|---|---|---|---|
| Direct | Exact match | One queue | Point-to-point messaging |
| Fanout | None | All queues | Broadcast, log messages |
| Topic | Pattern match | Matching queues | Event routing |
| Headers | None | Based on headers | Metadata routing |