anchor.diff:  
   The example is available in several languages:
   
  -* Java: link:src/main/java/io/vertx/examples/jdbc/transaction_rollback/JDBCExample.java[JDBCExample.java]
  -* JavaScript: link:src/main/js/io/vertx/examples/jdbc/transaction_rollback/jdbc_example.js[jdbc_example.js]
  -* Groovy: link:src/main/groovy/io/vertx/examples/jdbc/transaction_rollback/jdbc_example.groovy[jdbc_example.groovy]
  -* Ruby: link:src/main/rb/io/vertx/examples/jdbc/transaction_rollback/jdbc_example.rb[jdbc_example.rb]
  +* Java: link:src/main/java/io/vertx/example/jdbc/transaction_rollback/JDBCExample.java[JDBCExample.java]
  +* JavaScript: link:src/main/js/io/vertx/example/jdbc/transaction_rollback/jdbc_example.js[jdbc_example.js]
  +* Groovy: link:src/main/groovy/io/vertx/example/jdbc/transaction_rollback/jdbc_example.groovy[jdbc_example.groovy]
  +* Ruby: link:src/main/rb/io/vertx/example/jdbc/transaction_rollback/jdbc_example.rb[jdbc_example.rb]
  
positive.code: 
  The example is available in several languages:
  
  * Java: link:src/main/java/io/vertx/examples/jdbc/simple/JDBCExample.java[JDBCExample.java]
  * JavaScript: link:src/main/js/io/vertx/examples/jdbc/simple/jdbc_example.js[jdbc_example.js]
  * Groovy: link:src/main/groovy/io/vertx/examples/jdbc/simple/jdbc_example.groovy[jdbc_example.groovy]
  * Ruby: link:src/main/rb/io/vertx/examples/jdbc/simple/jdbc_example.rb[jdbc_example.rb]
  
  == Query Params
  
  
negative.code: 
  The example is available in several languages:
  
  * Java: link:src/main/java/io/vertx/example/jdbc/query_params/JDBCExample.java[JDBCExample.java]
  * JavaScript: link:src/main/js/io/vertx/example/jdbc/query_params/jdbc_example.js[jdbc_example.js]
  * Groovy: link:src/main/groovy/io/vertx/example/jdbc/query_params/jdbc_example.groovy[jdbc_example.groovy]
  * Ruby: link:src/main/rb/io/vertx/example/jdbc/query_params/jdbc_example.rb[jdbc_example.rb]
  
  == Transaction
  
  