Adds support for saveAllAndFlush.

Closes #1883
Original pull request #2148

Author: skrabbenborg

src/main/java/org/springframework/data/jpa/repository/JpaRepository.java

@@ -31,6 +31,7 @@
  * @author Oliver Gierke
  * @author Christoph Strobl
  * @author Mark Paluch
+ * @author Sander Krabbenborg
  */
 @NoRepositoryBean
 public interface JpaRepository<T, ID> extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
@@ -76,6 +77,14 @@ public interface JpaRepository<T, ID> extends PagingAndSortingRepository<T, ID>,
 	 */
 	<S extends T> S saveAndFlush(S entity);
 
+	/**
+	 * Saves all entities and flushes changes instantly.
+	 *
+	 * @param entities
+	 * @return the saved entities
+	 */
+	<S extends T> List<S> saveAllAndFlush(Iterable<S> entities);
+
 	/**
 	 * Deletes the given entities in a batch which means it will create a single query. This kind of operation leaves JPAs
 	 * first level cache and the database out of sync. Consider flushing the {@link EntityManager} before calling this

src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java

@@ -73,6 +73,7 @@
  * @author Jens Schauder
  * @author David Madden
  * @author Moritz Becker
+ * @author Sander Krabbenborg
  * @param <T> the type of the entity to handle
  * @param <ID> the type of the entity's identifier
  */
@@ -620,6 +621,20 @@ public <S extends T> List<S> saveAll(Iterable<S> entities) {
 		return result;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.jpa.repository.JpaRepository#saveAllAndFlush(java.lang.Iterable)
+	 */
+	@Transactional
+	@Override
+	public <S extends T> List<S> saveAllAndFlush(Iterable<S> entities) {
+
+		List<S> result = saveAll(entities);
+		flush();
+
+		return result;
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.jpa.repository.JpaRepository#flush()

src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java

@@ -91,6 +91,7 @@
  * @author Kevin Peters
  * @author Jens Schauder
  * @author Andrey Kovalev
+ * @author Sander Krabbenborg
  */
 @ExtendWith(SpringExtension.class)
 @ContextConfiguration("classpath:application-context.xml")
@@ -170,11 +171,23 @@ void savesCollectionCorrectly() throws Exception {
 				secondUser, thirdUser);
 	}
 
+	@Test // DATAJPA-1574
+	void savesAndFlushesCollectionCorrectly() {
+
+		assertThat(repository.saveAllAndFlush(asList(firstUser, secondUser, thirdUser))).hasSize(3).contains(firstUser,
+				secondUser, thirdUser);
+	}
+
 	@Test
 	void savingEmptyCollectionIsNoOp() throws Exception {
 		assertThat(repository.saveAll(new ArrayList<>())).isEmpty();
 	}
 
+	@Test // DATAJPA-1574
+	void savingAndFlushingEmptyCollectionIsNoOp() {
+		assertThat(repository.saveAllAndFlush(new ArrayList<>())).isEmpty();
+	}
+
 	@Test
 	void testUpdate() {
 
@@ -1101,6 +1114,20 @@ void saveAndFlushShouldSupportReturningSubTypesOfRepositoryEntity() {
 		assertThat(user.getEmailAddress()).isEqualTo(savedUser.getEmailAddress());
 	}
 
+	@Test // DATAJPA-1574
+	void saveAllAndFlushShouldSupportReturningSubTypesOfRepositoryEntity() {
+
+		repository.deleteAll();
+		SpecialUser user = new SpecialUser();
+		user.setFirstname("Thomas");
+		user.setEmailAddress("thomas@example.org");
+
+		List<SpecialUser> savedUsers = repository.saveAllAndFlush(Collections.singletonList(user));
+
+		assertThat(user.getFirstname()).isEqualTo(savedUsers.get(0).getFirstname());
+		assertThat(user.getEmailAddress()).isEqualTo(savedUsers.get(0).getEmailAddress());
+	}
+
 	@Test // DATAJPA-218
 	void findAllByUntypedExampleShouldReturnSubTypesOfRepositoryEntity() {