Real-Time Reporting using AWS Lambda and DynamoDB in Snowplow

Implementing a real-time reporting system using AWS Lambda, DynamoDB, and Snowplow's enriched event stream enables immediate insights for applications such as tracking active players in a game level. AWS Lambda and DynamoDB provide a serverless, low-latency infrastructure that automatically scales to handle fluctuating event volumes and offers cost efficiency by charging only for the compute and storage used. The setup involves configuring a Lambda function to process events from a Kinesis stream and updating a PlayerState table in DynamoDB to store each player's current level and timestamp. The system also includes functions to increment or decrement player counts in the LevelState table as players enter or exit levels, and a pruning function to handle inactive players by periodically cleaning up records. This architecture allows for the creation of a robust real-time reporting system with minimal latency, with further optimizations to be discussed in a subsequent part.