Building APIs as micro-services

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Building APIs as Micro- services Sokari, Tams

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What are Micro-Services?

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Micro-services are simply component units of a larger service.

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A Sound System with different components Example Illustration

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If we wish to be technical, Micro-services are a software architecture style in which complex apps are composed of small independent processes communicating with each other. Micro-services implement the much talked about Single Responsibility Principle (SRP).

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Why Micro-services?

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Pros of Micro-services • Ease of Development. • Ease of Deployment. • Scalability. • Flexibility with Choice of Tools. • Ease of Maintenance.

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Cons of Micro-services • Costs more to start up. • Increased number of requests. • Takes more memory.

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How we build Micro-service APIs

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Building APIs in the Micro-Service pattern requires two main layers: 1. The Service/Resource APIs. 2. The Gateway API.

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Micro-services API structure

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When do we build Micro- Service APIs?

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• Micro-Service APIs can be used when you have a large API. • If you envision a large API, it is best to start by building in the Micro-services pattern.

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Note-Worthy • Service APIs may or may not be made public for consumption. • Cross Origin Resource Sharing (CORS) is a means of limiting access. • It is best practices to limit access to the Gateway API when building APIs in the Micro-service Pattern.

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Questions???

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Resources • www.microservices.io • Software Architecture Patterns: http:// www.oreilly.com/programming/free/ﬁles/software- architecture-patterns.pdf