/**
* Overload that does not return anything
*
* @param action to perform in transaction
*/
public static void withinTransaction(final EntityManager em, final DoSomething action)
throws Exception {
withinTransaction(
em,
() -> {
action.call();
return null;
});
}
@Test
public void shouldFilterResult() throws Exception {
Optional<String> result =
ds.list()
.stream()
.peek(System.out::println)
.map(String::toUpperCase)
.peek(System.out::println)
.reduce((a, b) -> a + b);
assertTrue(result.isPresent());
assertEquals(TEST, result.get());
}
@Test
public void shouldReturnString() throws Exception {
String result = ds.execute(() -> TEST);
assertEquals(TEST, result);
}