Your First Cup: An Introduction to the Java EE Platform

Tiers in the Example Application

The example application has one web tier component (the firstcup web client), three business tier components (the DukesAgeResource web service, the FirstcupUser entity, and the DukesBirthdayBean enterprise bean), and one enterprise information system (EIS) tier (the data in the Java DB database table). The user's web browser is the client tier component, as it accesses the rest of the application through the web tier.