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