AWS Lambda is an event-driven computing service that allows you to run programs without provisioning servers, and is a core service of serverless architecture

By directly invoking events from over 200 AWS services and applications using AWS Lambda as a trigger, you can automatically execute your code when an event occurs, such as an HTTP request via Amazon API Gateway, an object change in an Amazon S3 bucket, or a DynamoDB table update

In addition, AWS Lambda automatically scales according to the number of requests, so you don't have to worry about the infrastructure required for data processing, and you can expand resources as traffic increases

All functions that maintain high availability, such as code execution and scaling, are managed by AWS Lambda, so customers can simply upload their application code to scale AWS services using custom logic or build their own backend services

AWS Lambda features

● Choice of development language
AWS Lambda supports multiple programming languages, including Java, C#, and Python, so developers can choose a language that suits their skills.

● Creating a function
Use the AWS Lambda console or AWS CLI to create a Lambda function, which is a unit of code that will be executed in response to a trigger.

● Setting a trigger Set
the event that will trigger the function. Triggers can be selected from AWS services such as API Gateway, S3, DynamoDB, and CloudWatch.

● Function execution
When a trigger occurs, the Lambda function is executed, performs the necessary processing, and returns a response. It also automatically scales according to the number of requests, ensuring high availability.

● Logging and Monitoring
You can collect Lambda function logs and store them in CloudWatch Logs, allowing you to view and troubleshoot Lambda function execution logs.

AWS Lambda trigger types

● API Gateway
allows you to send HTTP requests to Lambda functions, making it easy to build RESTful APIs.

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Lambda functions can be triggered when an S3 object is created or deleted, or when the object's metadata is changed.

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You can trigger a Lambda function when a CloudWatch metric exceeds a certain threshold.

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A Lambda function can be triggered when data is inserted, updated, or deleted in a DynamoDB table.

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By triggering a Lambda function when creating or updating a CloudFormation stack, you can automatically deploy and configure applications.

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A Lambda function can be triggered when an SQS message is added to a queue, enabling asynchronous communication between components of a distributed system.

● CloudTrail
Lambda functions can be triggered in response to administrative activity in your AWS account, automating tasks such as security monitoring and vulnerability detection.

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Real-time data processing is achieved by triggering a Lambda function when data becomes available in the Kinesis stream.

● When IoT
sensor data is collected, a Lambda function is triggered to process the data from the IoT device.

● Alexa Skills Kit
You can use Lambda functions to create custom skills for Amazon Alexa.

Beyond AWS related services

● AWS cloud integration
● AWS operation monitoring service (24 hours a day, 365 days a year)
● Serverless application design and development service