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‫Now let's talk about a quick service

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‫called the Amazon API Gateway.

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‫So this comes from the use case from an exam perspective

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‫of you wanting to build a server less HTTP API.

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‫So in this example, we have server less technologies

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‫so we're using Lambda,

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‫and we're Reading, Creating, Updating and Deleting data

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‫from DynamoDB,

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‫which are both server less technologies

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‫but we want external clients to be able to access our Lambda

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‫function.

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‫But a Lambda function is not exposed as an API right away.

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‫For this we need to expose it

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‫through an API Gateway

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‫which is going to provide the client with the rest HTTP API

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‫to connect directly to your website.

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‫And so, as we can see the client

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‫will talk to the API Gateway.

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‫The API gateway will proxy the request

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‫to your lender functions

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‫which will execute the transformations on your data.

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‫And so API Gateway is used

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‫as a fully managed service

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‫that is going to allow developers

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‫to easily create, publish, maintain,

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‫monitor, and secure APIs in the cloud.

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‫It is a server less technology,

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‫and it is fully scalable.

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‫It supports RESTful APIs,

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‫and also WebSocket APIs for real time streaming of data.

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‫It supports also security, user authentication,

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‫API throttling, API keys, monitoring, and so on.

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‫So when you see going to exam

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‫which creates a server less API

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‫you need to think about API Gateway and Lambda.

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‫That's it for this lecture.

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‫I hope you liked it.

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‫And I will see you in the next lecture.