private final static int NUMBER_INSERTS = 1000;
private long idCounter = 0;
private ChildEntity2 createChildEntity2() {
ChildEntity2 ce = new ChildEntity2();
ce.setId(idCounter++);
ce.setNumber(12345678);
ce.setData("some data, not really meaningful");
ce.setStrings(new HashSet<String>());
ce.getStrings().add("aaa");
ce.getStrings().add("bbb");
ce.getStrings().add("ccc");
return ce;
}