4.0.0 com.oracle.database.ha ons 21.1.0.0 jar ons Oracle Notification System (ONS) library for FAN events https://www.oracle.com/database/technologies/maven-central-guide.html 1997 Oracle Free Use Terms and Conditions (FUTC) https://www.oracle.com/downloads/licenses/oracle-free-license.html Oracle America, Inc. http://www.oracle.com