Order Processing Service

A Lambda function that processes customer orders from an API Gateway endpoint and logs all operations with proper correlation tracking across distributed service calls.

Requirements

Core Functionality

Build a Lambda handler that:

• Accepts order data from API Gateway events containing order details (order_id, customer_name, items)
• Logs the start and completion of order processing
• Simulates calling an external inventory service (log a message indicating the call)
• Simulates calling an external payment service (log a message indicating the call)
• Returns a success response with order confirmation

Correlation Tracking

• Extract and use correlation IDs from incoming requests to track the entire request lifecycle
• Ensure all log entries include the correlation ID so they can be grouped together
• The correlation ID should be automatically extracted from API Gateway request headers or context
• All log messages throughout the handler execution should include this correlation ID

Test Cases

• Processing an order with correlation ID from request headers produces logs containing that correlation ID @test
• Processing an order without explicit correlation ID generates logs with an auto-generated correlation ID @test
• All log entries within a single request share the same correlation ID @test

Implementation

@generates

API

def lambda_handler(event: dict, context) -> dict:
    """
    Process customer orders with correlation ID tracking.

    Args:
        event: API Gateway proxy event containing order details
        context: Lambda context object

    Returns:
        dict: API Gateway proxy response with status code and body
    """
    pass

Dependencies { .dependencies }

aws-lambda-powertools { .dependency }

Provides structured logging with correlation ID management for distributed tracing.