int count = 0;
String id = "m123"

count = getEm().createNativeQuery("call sample_procedure(?,?)").setParameter(1, id).setParameter(2, count)
                    .executeUpdate();

create or replace
PROCEDURE sample_procedure(
    id IN VARCHAR,
    count OUT NUMBER)
IS
  ........
BEGIN
.....
 LOOP
---------
 count := count + 1;