6.1. Chapter Overview

• Enterprise Application Interface (EAI) and Web Services technology have many similarities. Rather than either–or, Web Services technology can be a good complementary approach to integrating business functionality and legacy systems between business partners.

• Enterprise and cross-enterprise integration requires integration at different tiers—from security, data transport, middleware, and data to business processes.

• A catalog of Business-to-Business integration patterns is introduced to illustrate how Java Web Services and EAI technology are collaborated.