Implementing Event-Driven Architecture with Solace Messaging and SAP CPI

The article describes the implementation of an event-driven architecture using Solace as the event broker. It outlines the setup of Postman, implementation of the routing layer, and the publishing layer. The routing layer separates the target based on the XML root element, while the publishing layer publishes the data to Solace queues. The architecture includes exception handling, content modifiers, and process direct adapter calls to global retry layers and JMS retry for retry purposes. Additionally, a local integration process is implemented for mail triggering in case of business logic or non-recoverable errors.

In today's digital landscape, event-driven architecture (EDA) is a critical component for modern systems, enabling real-time data exchange and scalability. This article explores the implementation of EDA using Solace Event Broker within the SAP Cloud Platform Integration (CPI) environment.

Understanding Event-Driven Architecture

Event-Driven Architecture (EDA) is a design pattern where events are produced, published, and consumed asynchronously. Unlike traditional request-response models, EDA decouples systems, allowing for faster reaction times and easier scaling. For instance, in an e-commerce scenario, placing an order triggers events that automatically update the warehouse, billing, and CRM systems [1].

Solace Event Broker: The Backbone of EDA

Solace Event Broker acts as the backbone of EDA, facilitating high-performance message exchange between publishers and subscribers. It integrates seamlessly with SAP, enabling the publication of SAP events and the consumption of these events in the SAP Integration Suite (CPI) [1].

Designing the Event-Driven Integration Architecture in SAP CPI

The integration architecture in SAP CPI is designed using a three-layer approach: the Routing layer, the Transformation layer, and the Subscriber layer.

1. Routing Layer: This layer receives incoming HTTPS requests, determines the payload type, and routes it to the appropriate processing flow. It separates the target based on the XML root element, ensuring efficient message handling [2].

2. Transformation Layer: This layer performs transformations on product and supplier data. It publishes these events to Solace queues, facilitating real-time data exchange between systems [2].

3. Subscriber Layer: This layer picks up messages from the queues and sends the final data to various destinations, such as SFTP, S/4 Hana Cloud, or other adapters. It ensures that data is delivered to the correct endpoints, maintaining the integrity and reliability of the event-driven flow [2].

Exception Handling and Retry Mechanisms

The architecture includes robust exception handling and retry mechanisms. Global retry layers and JMS retry are employed to handle transient errors and ensure message delivery. Additionally, a local integration process is implemented for mail triggering in case of business logic or non-recoverable errors, ensuring that critical notifications are always sent [2].

Conclusion

Implementing event-driven architecture using Solace Event Broker in SAP CPI offers a scalable and resilient solution for real-time data integration. By leveraging the strengths of EDA, organizations can achieve faster reaction times, reduce dependencies between systems, and support independent scaling of consumers. This approach not only enhances operational efficiency but also lays the foundation for future growth and innovation.

References:

[1] https://community.sap.com/t5/technology-blog-posts-by-members/designing-event-driven-architecture-with-solace-event-broker-and-error/ba-p/14139426
[2] https://www.ainvest.com/news/sap-cpi-event-driven-integration-architecture-layer-design-2507/