Serverlesspresso: Building a Scalable, Event-Driven Application • Julian Wood • GOTO 2022

Serverless Architecture

• AWS provides a serverless architecture, allowing developers to focus on code and not infrastructure
• Examples include Serverless Espresso, a coffee-ordering app
• This architecture uses Lambda functions, API Gateway, DynamoDB, and Step Functions

Event-Driven Architecture

• Event-driven architecture allows for a scalable and resilient application
• Reduces coupling between services and microservices
• Can handle large amounts of concurrent requests

Scalability and Cost

• Serverless services scale automatically, withoutCODEINE cost
• Lambda functions use a pay-per-use pricing model
• Free tier allows for 1 million invocations per month
• Supports scalable architecture

Step Functions

• Workflow orchestration service that allows for complex workflows
• Can be used for business workflows, not just tech workflows
• Provides a visual representation of the workflow

AWS Services

• API Gateway provides a RESTful API
• Lambda functions handle computation
• DynamoDB stores data
• Step Functions orchestrates workflows
• MQTT (IoT Core) provides real-time messaging
• S3 provides file storage

Benefits

• Reduced infrastructure costs
• Improved scalability
• Increased reliability
• Reduced time to market
• Flexibility in architecture design
• Improved cost management

Applications

• Event-driven architecture
• Real-time messaging
• Complex workflows
• Scalable and resilient applications
• Reduced coupling between services
• Improved reliability
• Cost-effective deployment