If you want to use MongoDB in the Java Enterprise World you have to address two questions. The first one is: Should I use the native driver or should I use a persistence framework? Spring is a common framework in many Java applications. It has created a very good object-document-mapping framework with Spring Data for MongoDB. It is easy to integrate into new and existing Java applications. The second question is: How can I ensure my deliverables against error? So you need a testing framework. NoSQLUnit is such a framework that helps you to write tests against a real MongoDB Server or an in-memory clone like Fongo. This talk will cover Spring Data and NoSQLUnit. It will give a basic overview about what things are useful before you can deploy your application, e.g. in a cloud service like MongoSoup.

1. Boost your
Java Enterprise Stack
with MongoDB
!
!
bernd@mongosoup.de / twitter: @Bernd_Z
christian@mongosoup.de
!
26. Nov. 2013 @ Leightweight Java User Group Munich

3. Continuous Delivery

4. Standard JEE Stack
Frontend Layer
Service Layer
Repository Layer

6. MongoDB
{
}
"_id" : ObjectId("51f2ce49c2e6dce83534b73f"),
"orderId" : NumberLong(666),
"orderItems" : [
{
"product" : {
"_id" : ObjectId("51f2ce48c2e6dce83534b6ba"),
"articleId" : "100",
"name" : "Margherita",
"urlname" : "margherita",
"description" : "our famous tomato sauce and genuine mozzarella",
"type" : "PIZZA",
"category" : "vegetarian",
"price" : 3.8
},
"uuid" : "839f8305-a5e7-408a-96d5-e3d2819d6ad3"
}
],
"orderDate" : ISODate("2011-09-13T07:24:00Z"),
"deliveryAddress" : {
"firstname" : "Christan",
"lastname" : "Kroemer",
"street" : „Lindwurm Straße",
"zip" : "80337",
"city" : "Munich",
"houseNumber" : "97"
},
"userId" : "51f2ce48c2e6dce83534b70b"

7. Hibernate ORM
@Entity
@Table(name = „ORDER")
public class Order implements Serializable {
!
!
@Id
@GeneratedValue
@Column(name="ID")
private Long id;
mapping of POJOs to relational database tables
!
@OneToOne(cascade = CascadeType.ALL, optional = false, orphanRemoval = false)
@JoinColumn(name = "USER_ID", nullable = false)
@ForeignKey(name = "ORDER_USER_FK")
private User user;
@OneToMany(mappedBy = "order")
@Fetch(FetchMode.JOIN)
private List<OrderItem> orderItems;

8. Spring Data
@Document(collection = Order.COLLECTION_NAME)
public class Order implements Serializable {
public static final String COLLECTION_NAME = "order";
!
@Id
private ObjectId id;
!
@Indexed(unique = true)
annotated sample class here
private long orderId;
!
@DBRef
private User user;
private List<OrderItem> orderItems;
!
@Indexed
private Date orderDate = new Date();

9. Unit Tests
- Fast
- Isolated
- Repeatable
relational in memory DB for testing
- Self-verifying
- Timely

10. DBUnit
<?xml version="1.0" encoding="UTF-8"?>
<dataset>
<User id="0" title="Mr" firstName="Bernd" lastName="Zuther"/>
<User id="1" title="Mr" firstName="Christian" lastName="Kroemer"/>
</dataset>
@Test
@DatabaseSetup("sampleData.xml")
public void testFind() throws Exception {
List<User> userList = userService.findByName("Christian");
assertEquals(1, userList.size());
assertEquals("Christian", userList.get(0).getFirstName());
}

11. Fongo
<dependency>
<groupId>com.github.fakemongo</groupId>
<artifactId>fongo</artifactId>
<version>1.3.2</version>
</dependency>
!
!
!
alternative for the Mongo world
!
TODO: does mongo soup fit in there anywhere?
<bean name="fongo" class=“com.github.fakemongo.Fongo">
<constructor-arg value="InMemoryMongo" />
</bean>
!
<bean id="mongo" factory-bean="fongo" factory-method="getMongo" />

12. NoSQLUnit
@ActiveProfiles("test")
@ContextConfiguration(locations = "classpath:com/comsysto/shop/ui/spring-context.xml")
@UsingDataSet(locations="initialData.json", loadStrategy=LoadStrategyEnum.CLEAN_INSERT)
public class OrderRepositoryImplTest extends AbstractJUnit4SpringContextTests {
!
!
}
@Autowired private OrderRepository orderRepository;
@Autowired private ApplicationContext applicationContext;
Presenter
@Rule public MongoDbRule mongoDbRule = newMongoDbRule().defaultSpringMongoDb("pizza");
@Test
public void testFindAll() {
Sort sortOrder = new Sort(Sort.Direction.ASC, "orderId");
List<Order> retrievedOrders = orderRepository.findAll(10, 0, sortOrder);
assertNotNull(retrievedOrders);
assertEquals(5, retrievedOrders.size());
}

13. Continuous Delivery

14. Infrastructure

15. Danger Area

16. Downtime

17. Flyway
relational in memory DB for testing

18. Flyway
relational in memory DB for testing

19. MongoDB - Schemaless
{ name : "Bernd", age : 30, interests : "football" }
!
{ name : "Christian", age : 25 }
relational in memory DB for testing

20. MongoDB - Schemaless
relational in memory DB for testing

21. Build... Test... Live!
https://github.com/comsysto/mongodb-onlineshop/

22. Questions
Presenter