I'm building a NodeJS platform that consist of several core 'parts' (users, messages and trading signals).
So my idea is to create microservices for each of them, and it works pretty well.. But I can't get my head around how to 'join' data between the microservices (I'm a frontender originally.....)
For example, I have 3 microservices.. Each with its own MongoDB, on its own machine complete isolated.. Imagine the common situation where the messages is retrieved from a single microservice, the message has a 'user_id' and I need to get the username and profilePicture to be combined in the retrieved message object..?
I read a lot about using Redis, but it seems like a 'messaging' service to me, not much of a 'combine' service.. Can anyone help me through the darkness??
Thanks!!
I know its a very general question... But I just can't get a grip of what the 'best practice' is when combining data of multiple micro services..