World of serverless: AWS Lambda & EventBridge
Tags: lambda, aws, serverless, cloud
Published: 2023-10-01 11:25:25

In the **world of serverless computing** and event-driven architectures, AWS cloud offers powerful tools to help developers build highly responsive and scalable applications. Amazon EventBridge and AWS Lambda are two such services that, when combined, provide an elegant solution for executing Lambda functions in response to events.

## EventBridge
EventBridge is a **serverless service** that simplifies the connection of application components through event-driven communication, facilitating the development of scalable and responsive applications. Event-driven architecture, characterized by loosely-coupled software systems that interact by emitting and responding to events, enhances agility and supports the creation of robust, scalable applications.

EventBridge serves as a conduit for routing events **from various sources**, including in-house applications, AWS services, and third-party software, to consumer applications across your organization. It offers straightforward and consistent mechanisms for event ingestion, filtering, transformation, and delivery, expediting the application development process.


![serverless IoT](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/bpyhf6wyybpi6t51rq6n.jpg)

## How you can use AWS Lambda and Amazon EventBridge:
Certainly! Here are several examples of **how you can use AWS Lambda and Amazon EventBridge**:

- You can use Amazon EventBridge to monitor an S3 bucket for new image uploads. When a new image is detected, EventBridge triggers a Lambda function that processes the image, applies filters, and generates thumbnails, all without manual intervention. [How to clean S3 automatically – Lambda + CloudWatch Events](https://lepczynski.it/en/aws_en/how-to-clean-s3-automatically-lambda-cloudwatch-events/)

- EventBridge can be employed to collect real-time data streams from various sources like IoT devices, mobile apps, or web applications. Lambda functions can then process this data to perform analytics, generate alerts, or update dashboards. [How commercial IoT providers can build dynamic rules for real-time insights on AWS](https://aws.amazon.com/blogs/iot/how-commercial-iot-providers-can-build-dynamic-rules-for-real-time-insights-on-aws/)

- EventBridge can schedule recurring tasks, such as daily backups or weekly reports. When the scheduled time arrives, EventBridge triggers a Lambda function to execute the task automatically. [How to stop all EC2 in all AWS regions at the same time?](https://lepczynski.it/en/aws_en/how-to-stop-all-ec2-in-all-aws-regions-at-the-same-time/)

- If an error occurs in one of your AWS services, you can use EventBridge to capture the error event and trigger a Lambda function to handle it. Lambda can log the error, send notifications, or even attempt a retry of the failed operation. [Creating Amazon EventBridge rules that react to events](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-create-rule.html) 

- EventBridge can route events across AWS accounts. [Sending and receiving Amazon EventBridge events between AWS accounts](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-cross-account.html)

- EventBridge allows you to integrate third-party SaaS applications with your AWS resources. You can find more here [Amazon EventBridge integrations](https://aws.amazon.com/eventbridge/integrations/)

- EventBridge can monitor AWS CloudWatch alarms and automatically trigger Lambda functions when specific thresholds are breached. These functions can take actions like restarting instances or scaling resources to mitigate issues. [Alarm events and EventBridge](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch-and-eventbridge.html)

- EventBridge can be used to monitor social media platforms for example to get the Twitter trends for a specific region. [Guidance for Social Media Data Pipeline on AWS](https://aws.amazon.com/solutions/guidance/social-media-data-pipeline-on-aws/)

- For IoT applications, EventBridge can process events generated by IoT devices. For instance, if a temperature sensor reports a critical temperature, EventBridge can trigger Lambda to activate cooling systems or send alerts. [Using AWS Lambda with AWS IoT](https://docs.aws.amazon.com/lambda/latest/dg/services-iot.html)

Of course you can do much more, these are just a few examples ;) 

## Summary
These examples showcase the versatility of AWS Lambda and Amazon EventBridge in building event-driven, serverless solutions that automate processes, enhance real-time data processing, and seamlessly integrate various components and services in the cloud.

Below you can find tutorial [How to pass a variable to AWS Lambda via CloudWatch event](https://youtu.be/Y0Lf3P4p1RU?feature=shared):
{% embed https://www.youtube.com/watch?v=Y0Lf3P4p1RU %}

I also encourage you to take a look at my [blog lepczynski.it](https://lepczynski.it/en/) and to subscribe to my [YouTube channel](https://www.youtube.com/@WojciechLepczynski).

{% embed https://youtu.be/-GzWgAdK22E %}