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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.