springboot-aws-lambda-dynamodb

Spring Boot REST API integrated with AWS Lambda and DynamoDB for a fully serverless order CRUD system.

🧾 Serverless Order Service

A serverless Spring Boot application deployed on AWS Lambda that connects to Amazon DynamoDB for orders crud API.
This project demonstrates how to build scalable, event-driven APIs with Spring Boot and AWS services using best practices.

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🚀 Features

• Spring Boot REST APIs
• AWS Lambda (using aws-serverless-java-container)
• DynamoDB integration with DynamoDBMapper
• CRUD operations for restaurant orders
• Custom exception handling
• Response wrapper (ResponseDTO)
• Serverless deployment via AWS Console

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🏗️ Architecture

[API Gateway] → [AWS Lambda (Spring Boot)] → [DynamoDB]

• API Gateway exposes REST endpoints.
• AWS Lambda runs the Spring Boot application.
• DynamoDB stores order data.
• The app uses DynamoDBMapper for object persistence.

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📂 Project Structure

src/ ├── main/ │ ├── java/com/sample/order/ │ │ ├── config/ # Dynamo Db Config │ │ ├── controller/ # REST Controllers │ │ ├── service/ # Business Logic │ │ ├── model/ # Entity Classes │ │ ├── dto/ # Response DTOs │ │ ├── exception/ # Custom Exceptions │ │ └── OrderApplication.java # Lambda Entry Point │ │ └── StreamLambdaHandler.java # Lambda Entry Point │ └── resources/ │ ├── application.properties └── test/ # Unit Tests

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⚙️ Configuration

application.properties

aws.dynamodb.access-key=YOUR_ACCESS_KEY
aws.dynamodb.secret-key=YOUR_SECRET_KEY
aws.dynamodb.region=YOUR_REGION
aws.dynamodb.endpoint=ENDPOINT