Remote procedure invocation (RPI) pattern

Microservices have to interoperate with multiple microservices in order to complete any complex functionality. For this purpose, services use an inter-process communication protocol. The solution approach is to leverage the RPI for any inter-service communication and collaboration. The client uses a request/reply-based protocol to make requests to a service. The well-known RPI technologies include REST, gRPC, and Apache Thrift. This pattern is easy to implement and there is no need for any intermediate broker for facilitating the intended communication. However, there are a few critical drawbacks being associated with this pattern. That is, services are tightly coupled and have to be online to find, bind, and interact. Other prominent interaction types such as notifications, request/asynchronous response, publish/subscribe, and publish...