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Microservices, SOA, and APIs: Friends or enemies? - When comparing a microservices architecture and a service-oriented architecture (SOA), it is nearly impossible to gain agreement on how they are related to one another. Adding application programming interfaces (APIs) into the mix makes it even more challenging to understand the differences. Some might say that these concepts are distinct, solve their own set of problems, and have a unique scope. Others might be more generous and say that they achieve similar goals and work from the same principles. They might also say that a microservices architecture is a "fine-grained SOA" or that it is "SOA done right."
This article in the developerWorks library defines each of these concepts, explains where the varying opinions come from, and tries to find a middle ground. It also examines how these three concepts might be combined going forward.