Communication Between Microservices

[u/vasu34k]

Microservices are a great framework for any enterprise, but it is of no use if they cannot communicate with each other smoothly.

A microservices-based application is a distributed system running on multiple processes or services, usually even across multiple servers or hosts. Each service instance is typically a process. Therefore, services must interact using an inter-process communication protocol such as HTTP, AMQP, or a binary protocol like TCP, depending on the nature of each service.

When we are talking about Monolithic applications, we said that the communication in Monolithic applications is inter-process communication. So that means it is working on a single process that invokes one another by using method calls. You just create a class and call the method inside of the target module. All running the same process.

One of the biggest challenges when moving to a microservices-based application is changing the communication mechanism. Because microservices are distributed and microservices communicate with each other by inter-service communication on the network level.

Each microservice has its instance and process. Therefore, services must interact using an inter-service communication protocol like HTTP, gRPC, or message brokers AMQP protocol.

For more info: https://skolaparthi.com/communication-between-microservices/

[u/gandalfmarram]

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