example.java

    @AssertTrue(message = "Both "+PROPERTY_NAME_CASSANDRA_KEYSPACE+" and "+PROPERTY_NAME_CASSANDRA_CONTACT_POINTS+
            " are required if using Cassandra.")
    public boolean isCassandraConfigured(){
        if( StringUtils.isEmpty(getCassandraKeyspace()) ){
          return true;
        }
    
        return StringUtils.isNotEmpty(getCassandraKeyspace()) && StringUtils.isNotEmpty(getCassandraContactPoints());
    }