This pattern shows how to publish a rich domain event, Protobuf-encoded, to an Amazon EventBridge custom event bus (the eventsv2 API) using PutRawEvents together with an AWS Glue Schema Registry, and then deliver that same event to a Lambda subscriber.

The publisher encodes an OrderPlaced event from a .proto definition and wraps it in the Glue wire format (including the message-index that tells Glue which message type to decode as). EventBridge decodes the Protobuf against the Glue registry server-side and delivers the payload as plain JSON, so the consumer Lambda needs no Protobuf library and logs the event to CloudWatch. A matching orderId, fields, and metadata show the delivered event matches the published one.

This deploys one EventBridge custom event bus, one subscriber, an AWS Glue Schema Registry and Protobuf schema, one Python 3.14 Lambda function, an SQS dead-letter queue, and the delivery role.