How to call between Spring Cloud microservices?

2 years ago
Noah Thompson
1 minute

In the Spring Cloud microservices architecture, communication between microservices can be done through REST API, message queues, or RPC. Here are some common ways of communication:

  1. REST API is used for communication between microservices using the HTTP protocol, where one microservice acts as the provider and the other as the consumer, exchanging data through HTTP requests and responses.
  2. Message Queue: Using a message middleware to facilitate asynchronous communication between microservices. The provider sends messages to the message queue, while the consumer retrieves messages from the queue for processing.
  3. RPC (Remote Procedure Call): Communication between microservices is achieved through remote procedure calls. Service providers and consumers can call methods as if they were local, with communication happening through protocols like HTTP or TCP.

Regardless of the method used, the corresponding dependencies and configurations need to be added in the microservices to enable communication between them. In Spring Cloud, components like Feign, Ribbon, Eureka, etc., can be utilized to simplify calls between microservices.

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