4.0.0 org.apache.tuscany.sca tuscany-sca 2.0-Beta1 ../pom.xml sample-implementation-java-calculator-async-contribution Apache Tuscany SCA Sample implementation.java Calculator Async Contribution org.apache.tuscany.sca tuscany-feature-api pom 2.0-Beta1 junit junit 4.8.1 test ${artifactId} org.apache.tuscany.maven.plugins maven-tuscany-plugin 2.0-Beta1