Tuscany Hello World Multi-Component Sample

Overview

The Tuscany hello world multi-component sample shows using the Tuscany SCA runtime in a J2SE environment loading a component that implements the classic introductory hello world example. This sample shows the wiring of multiple components in a single SCA module.

Setup

The jars for a J2SE setup not requiring web services are required including the sample's own jar helloworldmc-SNAPSHOT.jar.

Running

Using JDK 1.5 java command with the previous jars run the class org.apache.tuscany.samples.helloworldmc.HelloWorldServiceComponentImpl

Results

The sample when run should simply display to the standard output:
Hello SCA World

Code Overview

The source files are physically organized as shown below:

main
+---java
    ¦   sca.module
    ¦
 +---org
 +---apache

                    +---tuscany
 +---samples
 +---helloworldmc
 GreetingPortionProvider.java

                    GreetingPortionProviderImpl.java
 HelloWorldService.java

                    HelloWorldServiceComponentImpl.java

sca.module	Defines the SCA module and the HelloWorldServiceComponent, GreetingPrefixComponent and GreetingSuffixComponent components Wires the HelloWorldServiceComponent to reference the GreetingPrefixComponent and GreetingSuffixComponent. Customizes the GreetingPrefixComponent and GreetingSuffixComponent components with the greetings.
GreetingPortionProvider.java	Defines the Java interface implemented by the component. GreetingPrefixComponent and GreetingSuffixComponent
GreetingPortionProviderImpl.java	Implements the SCA components GreetingPrefixComponent and GreetingSuffixComponent . Uses the SCA service annotation tag on the class to show what SCA interface is being implemented. Uses the SCA defined Property Java annotation on the `greetingPortion` Java field to customize the component in the sca.module file.
HelloWorldService.java	Defines the Java interface implemented by the component. HelloWorldServiceComponent.
HelloWorldServiceComponentImpl.java	Implements the HelloWorldServiceComponent component. Shows two Java fields being used to reference the and GreetingPrefixComponentGreetingSuffixComponent components.