This document summarizes Morphia, an object-document mapper for MongoDB that allows mapping Java objects to MongoDB documents. It discusses how Morphia provides an object-relational mapping for MongoDB similar to JPA, but with features tailored for MongoDB like schemaless documents and embedded objects. Examples of Morphia annotations and queries are provided, as well as links to Morphia's GitHub repository and a demo application.

1. Morphia JPA for MongoDB

2. Philipp Krenn
@xeraa

3. Who uses
JPA?

4. Who uses
MongoDB?

5. Who uses
Morphia?

6. Like JPA for
MongoDB
...but better

7. @OneToMany(mappedBy = "destCustomerId")
@ManyToMany
@Fetch(FetchMode.SUBSELECT)
@JoinTable(name = "customer_dealer_map",
joinColumns = {
@JoinColumn(name = "customer_id",
referencedColumnName = "id")},
inverseJoinColumns = {
@JoinColumn(name = "dealer_id",
referencedColumnName = "id")})
private Collection<Client> dealers;

9. Relations vs Objects

10. MongoDB

11. Table = Collection
Schemaless
Row = Document
JSON

12. {
"name": "Philipp",
"isAlive": true,
"age": 30,
"height_cm": 181.5,
"address": {
"city": "Vienna",
"postalCode": "1190"
},
"phoneNumbers": [ {
"type": "mobile",
"number": "+43 123 4567890"
} ],
"children": []
}

13. Morphia

14. Object-Document
Mapping
POJO + Annotations
Object-Relational Mapping

15. Features
Lightweight
Type safe & preserving

16. Required libraries
https://github.com/mongodb/
mongo-java-driver (2.12.4)
+
https://github.com/mongodb/
morphia (0.108)

17. Show me some code
https://github.com/xeraa/
morphia-demo

18. TODO: final class diagram

19. Annotations

20. @Entity
@Entity(
value = "company",
noClassnameStored = true
)
public class CompanyEntity {
Tip: Avoid dashes in the collection name

21. Queries

23. Patterns

24. Base Class

25. Converters

26. Auto Increments

27. Encryption

29. Future

31. Thanks!
Questions?
Now, later today, or @xeraa