AWS Lambda Patterns: Building Scalable Serverless Applications

Amazon Lambda enables you to run code without provisioning or managing servers. This guide explores common patterns and best practices for building serverless applications.

Event Processing Patterns

1. Synchronous Request-Response

exports.handler = async (event) => {
    try {
        // Parse API Gateway event
        const body = JSON.parse(event.body);
        
        // Process request
        const result = await processRequest(body);
        
        // Return formatted response
        return {
            statusCode: 200,
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                message: 'Success',
                data: result
            })
        };
    } catch (error) {
        return {
            statusCode: 500,
            body: JSON.stringify({
                message: 'Error processing request',
                error: error.message
            })
        };
    }
};