What tools and protocols have you used for data exchange between microservices?

For data exchange between microservices in Java projects, I used the following tools and protocols:

• REST API with HTTP/HTTPS for synchronous communication.
• gRPC for high-performance binary communication.
• Messaging through brokers (e.g., Apache Kafka, RabbitMQ) for asynchronous exchange.
• JSON and Protobuf as data serialization formats.

For example, for REST interactions, I used Spring Boot with @RestController and @RequestMapping annotations. For asynchronous messages, I configured producers and consumers in Kafka.

This ensures reliable and scalable communication between microservices.