Part 2. Using Tuscany

Part 1 gave you a high-level view of most of the features of Apache Tuscany’s SCA Java runtime. With the foundations laid, part 2 gives more detail about creating SCA components to support the various parts of your enterprise application.

Part 2 starts with chapter 4, “Service interaction patterns,” which provides an overview of the different interaction patterns used to send messages from one SCA component to another and back again. You’ll learn how the interacting components can run within the same JVM or in separate JVMs and how different styles of message exchange are configured. With SCA you can, depending on your requirements, choose whether components exchange messages synchronously or asynchronously, whether one message gives rise to a callback message, and whether a sequence of messages is grouped together in a conversation.

In chapters 5 and 6, “Implementing components using the Java language,” and “Implementing components using other technologies,” you’ll be introduced to some of the technologies that can be used to implement components when using Apache Tuscany. Chapter 5 concentrates on Java and demonstrates how SCA components can be implemented using your existing Java skills. The lightweight SCA Java annotations and API are described, giving you access to a more comprehensive set of SCA features and interaction patterns. Chapter 6 explains how the SCA programming model is presented in BPEL, Spring, and Java-based scripting languages.