An example of a set of slides used for a course on Advanced Enterprise Integration, a senior-level class at Penn State

1. IST 421 Advanced Enterprise Integration Technology Choices Sandeep Purao, Ph.D. Associate Professor of IST

2. Where we are Enterprise Integration Module 1: The Context Organizational Processes Module 2: Structuring the Problem Integration Requirements Integration Fundamentals Technology Choices

5. Problem 1

6. Coupling / Integration Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface Consider one link between two applications: What is the difference between integration and coupling? What is tight coupling vs. loose coupling of applications? Which is desirable?

7. Assumptions Assumption 0: I know how Chin sees the world, it is the same as me Assumption 1: I know where to reach Chin, at the Number 232.454.7676 Assumption 2: I know that Chin is there and will pick up the phone Assumption 3: I know that Chin will understand my question and how I ask it Demuestre por favor John' historia de ventas de s del enero de 2005 al diciembre de 2007. Kabir Chin Billing Coordinator Help Desk Operator

8. Assumptions = Coupling Assumption 0: I know the data encoding for the Billing app and I use it too Assumption 1: I know where the Billing app sits e.g. 196.23.123.02 Assumption 2: I know that the Billing app is up and running right now Assumption 3: I know that the Billing app follows my question/data format Billing: Please show me John’s History for the dates Jan 05 to Dec 07. Tight Coupling leads to Brittle Solutions

14. Data Exchange Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface SQL + ODBC Extract data with SQL, Use ODBC for indirection XML Use XML for shared schemas

15. Messaging Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface RPC Similar to function calls, to remote apps Message Queues Intermediate storage Message Brokers Routing to different recipients

16. Interface Extraction Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface Screen scraping Extracting interfaces from green terminals Portals Aggregating interfaces Portal

17. Distributed Objects Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface Registering Here I am and this is my interface Message I can respond to messages that confirm to my interface

18. Web Services Data Function aka Processing Presentation aka Interface Data Function aka Processing Presentation aka Interface Registering I am a service and this is what I am capable of Message Invoking services Process Create new services Self-Help Service

21. Example EI Patterns Message Translator Scatter Gather Translating message formats between systems Broadcasting a request to multiple recipients, then using an aggregator to collect responses http://www.enterpriseintegrationpatterns.com/eaipatterns.html 2008-1-May 1-May-2008

22. Using EI Patterns Applying good design practices to create a robust integration solution This example concatenates several EI patterns to create a new solution