Messaging in microservices

It is very important to carefully consider the choice of the messaging mechanism when dealing with the microservice architecture. If this one aspect is ignored, then it can compromise the entire purpose of designing using the microservice architecture. In monolithic applications, this is not a concern as the business functionality of the components gets invoked through function calls. On the other hand, this happens via a loosely coupled web service level messaging feature, where services are primarily based on SOAP.  In the case of the microservice messaging mechanism, it should be simple and lightweight.

There are no set rules for making a choice between various frameworks or protocols for a microservice architecture. However, there are a few points worth consideration here. Firstly, it should be simple enough to implement, without adding any complexity to your system. Secondly, it should be lightweight enough, keeping in mind the fact that the microservice architecture could heavily rely on interservice messaging. Let's move ahead and consider our choices for both synchronous and asynchronous messaging along with the different messaging formats.