Communication in microservices
It is very important to consider the choice of messaging mechanisms carefully when dealing with a microservice architecture. If this one aspect is ignored, then it can compromise the entire purpose of designing with a microservices architecture.
Let's move ahead and consider our choices for both synchronous and asynchronous messaging along with different messaging formats.
Synchronous messaging
When a timely response is expected from a service by a system and the system waits on it till a response is received from the service, it is called synchronous messaging. REST is one of the most sought-after choices in a microservice architecture. It is simple and supports HTTP request-response, therefore there is no need to look for an alternative. This is also one of the reasons that most implementations of microservices use HTTP (API-based styles).
Asynchronous messaging
When a system is not immediately expecting a response from the service and it can continue processing...