We design our system based on micro service architecture. I have a question: how do I go from my backend_1 (InformationSystem_1) to the backend_2 (InformationSystem_1). Do I need to make a api gateway(API_outside on image) for communicating with external systems, or is it possible to go from backend_1 to backend_2 directly?There are no security requirements, but the backend_2 is done by another team. Which pattern is better to apply?
It seems to me that you need to make a separate service for going outside (API_outside) to hide all the insides of the backend. But how justified is this? enter image description here
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