The Ultimate Guide to AWS Step Functions

The Ultimate Guide to AWS Step Functions

Find out everything about AWS Step Functions, what they are used for, how to use them, and the advantages or disadvantages that they bring.

The use of serverless computing has become a must nowadays, and some of you may already know a thing or two about Amazon Web Services like Lambda Functions, Step Functions, and other services AWS provides. However, if this is the first time you hear about them – fantastic!

In this article, we’ll discuss AWS Step Functions, what they are used for, how to use them, and the advantages or disadvantages that they bring.

AWS Step Functions 101

Before we can jump into Step Functions, you need to familiarize yourself with the basic structure behind them. Step Functions are an AWS-managed service that uses Finite-State Machine (FSM) model.

Why is that important?

By coordinating multiple AWS services into different serverless workflows, you can quickly build and update the apps. Additionally, with Step Functions, you’ll be able to both design and run workflows that’ll bring together various services, including Amazon ECS and AWS Lambda, into feature-rich applications.

FSM Model Explained

The two keywords you need to remember are States and Transitions.

Now, why are these words so important?

FSM model does a simple job – it uses given states and transitions to complete the tasks at hand. Finite-State Machines are also known as a behavioral model. It’s an abstract machine (system) that can be in 1 (one) state at a time, but it can also switch between a finite number of states.

This machine is defined solely by its states and the relationship these states have between themselves. A good and very straightforward example is the “closed-door example.” The door can either be open or closed, and these are the only two possible states. Now, the transition part is the switch between two states, but you need to provide some input first to get there. When you close the door, you’re placing an input. Additionally, the sequence of opening the closed door is known as the switch between two states (transition).

Step Functions state input and transition

You can also apply the same thing to other examples, like your daily life routines. Let’s take “Work, home, bed” as states. From work (state), you take a bus (input) to get home (state), and when you arrive home, you go to bed (another input leading to another state). Tomorrow morning when you wake up and get out of your bed, you’re transitioning from the last state you were in into a previous one, and yet again, taking the bus from home to work is one more transition.

There are other, more complex examples with many more states, inputs, and transitions between them, and the more states you add, the more complex the FSM model becomes.

The conclusion is simple — FSMs are a method of modeling your system by defining the states and transitions between those states.

devops microservices aws cloud computing serveless step functions fsm

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Multi-cloud Spending: 8 Tips To Lower Cost

Mismanagement of multi-cloud expense costs an arm and leg to business and its management has become a major pain point. Here we break down some crucial tips to take some of the management challenges off your plate and help you optimize your cloud spend.

AWS Cloud Practitioner Course | NetCom Learning

Learn AWS cloud concepts, AWS services, security, architecture under AWS cloud practitioner course from AWS certified instructors. Authorized AWS Training

What is AWS DevOps? - AWS DevOps Tutorial

What is AWS DevOps? - AWS DevOps Tutorial. In this blog on what is AWS DevOps, you will learn about AWS & DevOps along with the implementation of the concepts of DevOps with the help of AWS cloud platform.

Best Cloud Computing (AWS) Development Company

Develop highly scalable apps on Amazon Cloud Services in India. Mobile App Development India Offers Amazon cloud web services (AWS) for app development, database storage solution, hosting solution etc.

What is Cloud Computing? | Cloud Computing Fundamentals | AWS Training

This Edureka video on What is Cloud Computing will help you learn the fundamentals of Cloud Computing.