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Can one Microservice call another?
Yes, one microservice can call another, but first, you have to define whether a communication is synchronous or asynchronous. For web application communication, the HTTP protocol has been the standard for many years, and that is no different for microservices.
How do you call two microservices?
You need to understand how REST-Services work. After that just write 2 Microservices (2 Rest-Services: producer-service and consumer-service) with Spring-boot, let them run under different server-ports, call the consumer-service from the other, and that’s it: you have your Microservices.
When do microservices need to communicate with each other?
In these cases, your microservices need to communicate with each other. But that sounds a lot easier than it seems. As soon as your services need to interact with each other, you can’t any longer ignore that you’re building a distributed system.
How to avoid common problems with distributed microservices?
With a system of distributed microservices, you need to prepare for this situation. Independently deployed services also fail independently. So, you need to implement your communication in a fault tolerant way so that the downtime of one service doesn’t affect other services.
Can you build more than one microservice at a time?
But building one microservice is obviously not enough. The overall idea of this architectural style is to implement an application as a system of services. In the beginning, that seems like an easy task.
Why do services need to talk to each other?
There are several characteristics that the common sense tells us our services should possess. They are: Low coupling. If you make some changes in service A, you don’t want them to affect service B. High cohesion. If you need to implement some feature, you want the least possible number of services to be affected. High autonomy.