The book concentrates on leveraging Java Business Integration (JBI) for addressing real world integration problems with examples. Business level integration in Java needs to address integrating multiple flavors of business components including POJO, EJB, Web Services, JMS, etc. The book explains all the above scenarios, using open source Apache ServiceMix as the ESB framework. This book discusses: � Assemble services and port it across containers using JBI � Expose EJB as WSDL compliant service across firewalls � Bind remote services onto the ESB to be consumed internally � Expose local components in ESB like POJO as WSDL compliant services to be accessible externally. � Provide a web service gateway for external consumers � Access web services over reliable transport channel like JMS � Implement web service versioning using ESB � Implement service aggregation at ESB � Transactions, Security, Clustering & JMS in ESB