In this demo-driven session, we will begin with a sample application that includes a pre-existing service layer. We will proceed to enhance the application while maintaining a clean separation of concerns between the integration responsibilities and the business logic within that service layer. The integration components will include Polling Consumers, Content-Based Routers, Splitters, Transformers, Service Activators, and more. We will also explore Channel Adapters and Messaging Gateways to connect to different systems using Spring Integration's support for JMS, Mail, and File-based transports.