Benefits of microservices

You start building microservices because they give you a high degree of flexibility and autonomy with your development teams, but you and your
team quickly find that the small, independent nature of microservices makes them easily deployable to the cloud. Once the services are in the cloud, their small size makes it easy to start up large numbers of instances of the same service, and suddenly your applications become more scalable and with forethought, more resilient.

A microservice architecture has the following characteristics:

  • Application logic is broken down into small-grained components with well defined boundaries of responsibility that coordinate to deliver a solution.
  • Each component has a small domain of responsibility and is deployed completely independently of one another. Microservices should have responsibility for a single part of a business domain. Also, a microservice should be reusable across multiple applications.
  • Microservices communicate based on a few basic principles (notice I said principles, not standards) and employ lightweight communication protocols such as HTTP and JSON (JavaScript Object Notation) for exchanging data between the service consumer and service provider.
  • The underlying technical implementation of the service is irrelevant because the applications always communicate with a technology-neutral protocol (JSON is the most common). This means an application built using a microservice application could be built with multiple languages and technologies.
  • Microservices—by their small, independent, and distributed nature—allow organizations to have small development teams with well-defined areas of responsibility. These teams might work toward a single goal such as delivering an application, but each team is responsible only for the services on which they’re working.

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