Event Source Mapping
A feature that allows AWS Lambda functions to process events from various AWS services automatically.
Description
Event Source Mapping is a feature in AWS that enables the automatic invocation of AWS Lambda functions in response to events from supported AWS services. This allows developers to create serverless applications that respond in real-time to changes in data or system state. For instance, when new records are added to an Amazon DynamoDB table or when a new object is uploaded to an Amazon S3 bucket, Event Source Mapping can trigger a Lambda function to process that event. This capability reduces the need for polling and manual intervention, allowing for more efficient and scalable architecture. Additionally, Event Source Mapping can also handle the retry of failed events, ensuring that no data is lost in the event of transient errors. This makes it particularly useful for applications requiring high availability and reliability, such as real-time data processing systems or event-driven architectures.
Examples
- An AWS Lambda function that processes new messages from an Amazon SQS queue to perform background processing tasks.
- A Lambda function triggered by changes in an Amazon DynamoDB table, such as updating a search index or caching the latest data.
Additional Information
- Event Source Mapping supports multiple AWS services, including Amazon Kinesis, Amazon SQS, Amazon DynamoDB, and Amazon S3.
- Developers can configure Event Source Mapping settings through the AWS Management Console, AWS CLI, or AWS SDKs to customize the behavior of their Lambda functions.