This chapter covered three basic requirements that drive interoperability in solutions today: interoperability at the presentation tier, reuse of business tier components , and business tier resource sharing. These requirements are based on three particular scenarios, and many variations might be applied to make them fit your own situation.
In addition to covering these requirements, we introduced two new terms: point-to-point interoperability and resource tier interoperability . These two concepts stem from the architecture in the three scenarios just mentioned and will help us categorize the technology choices presented throughout the book.
Before we look at these technology options, we'll discuss exchanging data between .NET and J2EE. This will give you the foundation to understand some of the most common elements of interoperability, regardless of the technical solution you select.