4.0.0 org.apache.tuscany.sca tuscany-samples 2.0-SNAPSHOT ../../pom.xml sample-callback-api-contribution Apache Tuscany SCA Sample Callback API Contribution org.apache.tuscany.sca tuscany-node-api 2.0-SNAPSHOT org.apache.tuscany.sca tuscany-node-impl 2.0-SNAPSHOT org.apache.tuscany.sca tuscany-implementation-java-runtime 2.0-SNAPSHOT