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‫Now let's learn

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‫about the AWS Step Functions.

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‫So, Step Functions is a way for you

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‫to build a serverless visual workflow

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‫to perform orchestration,

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‫and it's usually of your Lambda functions.

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‫So you would design a graph,

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‫and you would say at each step of the graph,

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‫in case of success or failure, what goes on next?

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‫And this is really cool,

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‫because you can start really having some complex workflows

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‫within AWS.

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‫So Step Functions have some internal features,

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‫such as sequencing, parallel functions, conditions,

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‫timeouts, error handling, and so much.

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‫And it doesn't just do Lambda functions.

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‫It is actually integrate with EC2 instances, ECS tasks,

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‫On-premises servers, the API Gateway,

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‫the SQS queues, [00:00:47 NMADB],

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‫and actually a lot of AWS services.

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‫Also, it is possible for you

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‫within the Step Function workflow

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‫to implement a human approval feature.

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‫For example, a workflow goes up to some points,

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‫and you say, okay, a human will have a look at the results.

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‫And if the human says "Yes," then please go on.

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‫If "No," then fail.

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‫This is something that's possible

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‫thanks to the Step Functions.

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‫So the use cases of Step Functions are manifold,

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‫but, like, we can have, for example, the order fulfillment.

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‫We can have data processing, web applications,

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‫or any kind of workflow that is complex

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‫to describe and that would require some sort

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‫of graph for you to visualize it, okay?

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‫So that's it for this little intro.

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‫I hope you liked it.

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‫And I will see you in the next lecture.