Inter-Service Communication with Message Queues
Learn how microservices talk to each other asynchronously using message queues like RabbitMQ, decoupling services and improving resilience.
Synchronous vs Asynchronous Communication
Microservices can talk in two ways:
- Synchronous (HTTP/gRPC): the caller waits for a reply
- Asynchronous (messaging): the caller sends a message and moves on
Async communication decouples services so a slow or down consumer does not block the producer.
What is a Message Queue?
A message queue is a buffer that holds messages until a consumer is ready to process them. Producers push messages in; consumers pull them out — usually in FIFO order.
Popular brokers include RabbitMQ, Kafka, and Redis Streams.
All lessons in this course
- Introduction to Microservices Architecture
- Developing Node.js Microservices
- Implementing an API Gateway
- Inter-Service Communication with Message Queues