The Tuscany Java SCA runtime supports components implemented in Java by using the <implementation.java> SCDL extension.
The Java component implementation SCDL has the following format:
<implementation.java class="NCName" />
Where the class attribute is the fully qualified name of the Java class of the implementation.
The Java component implementtaion is one of the SCA extensions which is being formalized in the OASIS Open Composite Services Architecture with a published specifications document.
some examples
This example shows a simple composite with a component that uses <implemantation.java>: