Chapter 5 Designing the integration Layer The proxy design pattern provides a single point of entry to the target application; in addition, it supports policy implementation and ensures compliance monitoring. It reduces time of solution, price of integration, and testing efforts. Point to point ensures that one application would consume the message at a time. For example, it is used in RPC to transfer data. Pattern – Rich Integration Interaction Model Service and semantics standardization is mainly focused on abstracting the complexities by targeting flexible and loosely coupled connections. Composite service is focused on building flexibility into the services themselves in each of the dimensions of policy, process, and structure by hiding the multiple fine- grained services exposed by legacy systems and creating business-aligned coarse- grained services. Process Service is similar to composite service but with larger scope. Its focus is on hosting end-to-end business processes involving systems and people, which represents an end-to-end business capability delivered by business. Pattern – Multichannel Application Interaction Model Multichannel services provide faster response to business change requiring the support of new channels; consistency of capability and information is delivered to all channels. Multichannel and differentiated services provide faster response to business change requiring the support of new channels; consistency of capability and information is delivered to all channels. In addition, they provide added value to the privileged consumer while minimizing the price. The focus is on consistency across divergent interaction methods and technologies, building a generally related body of services and addressing specific issues of security and versioning. Pattern – External Partner Integration Interaction Model The focus is predominantly on security, closely followed by protocol translation, QoS, and semantic adaptation. Third-party applications are integrated with the DXP’s application. 163