4.0.0 jBPM 4 - DB org.jbpm.jbpm4 jbpm-db jar org.jbpm.jbpm4 jbpm 4.1 ../../pom.xml upgrade jbpm.previous.version maven-dependency-plugin previous-version generate-resources unpack org.jbpm.jbpm4 jbpm-db ${jbpm.previous.version} ${previous.version.directory} maven-antrun-plugin upgrade-script process-resources run ${project.build.directory}/${jbpm.previous.version} org.jbpm.jbpm4 jbpm-jpdl hsqldb hsqldb mysql mysql-connector-java postgresql postgresql maven-antrun-plugin create-drop-script generate-resources run