Integration requires a level of thinking different from the traditional software engineering where you have to think in terms of software "plugs" and "sockets". I have to admit that my university courses in Machine Design helped me a lot to think of the software integration problem in terms of "shafts" and coupling"—in fact, their counterparts in EAI. I hope you too admit that after reading this chapter. So, the next time when you want to integrate software components think in terms of EAI and patterns. Moreover, try to "select and assemble integration building blocks" rather than hand coding and hardwiring endpoints. This will help you to integrate in a loosely-coupled manner which will facilitate easy service collaboration and orchestration. The next chapter will show you a sample of aggregating multiple services on the ESB using the EAI patterns and guidelines which we learned in this chapter.