Boost your Java Enterprise Stack with MongoDB [email protected] / twitter: @Bernd_Z [email protected] 26. Nov. 2013 @ Leightweight Java User Group Munich
LJUGM - Boost your Java Enterprise Stack with MongoDB
Jan 13, 2015
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.
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.
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Transcript
Boost your Java Enterprise Stack
with MongoDB
!
!
[email protected] / twitter: @Bernd_Z [email protected]
!26. Nov. 2013 @ Leightweight Java User Group Munich
Continuous Delivery
Standard JEE Stack
Frontend Layer
Service Layer
Repository Layer
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" }
Hibernate ORM
mapping of POJOs to relational database tables
@Entity @Table(name = „ORDER") public class Order implements Serializable { ! @Id @GeneratedValue @Column(name="ID") private Long id; ! @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;
Spring Data
annotated sample class here
@Document(collection = Order.COLLECTION_NAME) public class Order implements Serializable { public static final String COLLECTION_NAME = "order"; ! @Id private ObjectId id; ! @Indexed(unique = true) private long orderId; ! @DBRef private User user; private List<OrderItem> orderItems; ! @Indexed private Date orderDate = new Date();
Unit Tests
relational in memory DB for testing
- Fast
- Isolated
- Repeatable
- Self-verifying
- Timely
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()); }
Fongo
alternative for the Mongo world TODO: does mongo soup fit in there anywhere?
<dependency> <groupId>com.github.fakemongo</groupId> <artifactId>fongo</artifactId> <version>1.3.2</version> </dependency> !!!!<bean name="fongo" class=“com.github.fakemongo.Fongo"> <constructor-arg value="InMemoryMongo" /> </bean> !<bean id="mongo" factory-bean="fongo" factory-method="getMongo" />
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; @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()); } }
Presenter
Continuous Delivery
Infrastructure
Danger Area
Downtime
Flyway
relational in memory DB for testing
Flyway
relational in memory DB for testing
MongoDB - Schemaless
relational in memory DB for testing
{ name : "Bernd", age : 30, interests : "football" } !{ name : "Christian", age : 25 }
MongoDB - Schemaless
relational in memory DB for testing
Build... Test... Live!
https://github.com/comsysto/mongodb-onlineshop/
Questions
Presenter
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