Direct HTTP Communication

Not a good solution that makes coupling each microservices, and loose power of microservices independency.

▪ Async Communication

The best practice is reducing inter-service communication as much as possible and use async communication. Can't reduce these internal communications due to customer requirement.

▪ Client send query request to internal microservices to accumulate some data.

▪ Those query request wait immediate response so we can't proceed with async communication.

▪ Transient errors, Network congestion or any overloaded microservice can result in long-running and failed operations.

▪ Materialized View Pattern

Reduce inter-service communication and provide sync response.

https://medium.com/design-microservices-architecture-with-patterns/microservices-data-management-when-performing-queries-between-services-42896a733567