1. │©2022 VMware, Inc.
Modern Persistence
With Spring Data 3

2. People Standing on Platform of a Subway Station - Niklas Jeromin - https://www.pexels.com/

3. Baseline
Java 17
Framework 6
Jakarta EE 9

4. Baseline
Framework 6
/*
* Extend Future with the capability to accept completion callbacks.
* @deprecated as of 6.0, in favor of CompletableFuture
*/
@Deprecated(since = "6.0")
public interface ListenableFuture<T> extends Future<T> { ... }
future.addCallback(
it -> { ... },
exception -> { ... }
);
future.whenComplete(
(it, exception) -> { ... }
);

5. Minimum Baseline
Java 17
Framework 6
Jakarta EE 9
/*
* Extend Future with the capability to accept completion callbacks.
* @deprecated as of 6.0, in favor of CompletableFuture
*/
@Deprecated(since = "6.0")
public interface ListenableFuture<T> extends Future<T> { ... }
future.addCallback(it -> { ... }, exception -> { ... });
future.whenComplete((it, exception) -> { ... });

6. RxJava1 & RxJava2 support
discontinued
import io.reactivex.Maybe;
interface RxPersonRepository extends RxJava2CrudRepository {
Maybe<Person> findPersonById(Long id);
}
import io.reactivex.rxjava3.core.Maybe;
interface RxPersonRepository extends RxJava3CrudRepository {
Maybe<Person> findPersonById(Long id);
}

7. import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
Baseline
Jakarte EE 9
-Drewrite.activeRecipes=org.openrewrite.java.migrate.JavaxMigrationToJakarta
$> java -jar spring-boot-migrator.jar
jee-project:> apply initialize-spring-boot-migration
SBM
$> find * -name '*.java' | xargs perl -pi -e "s/javax.persistence./jakarta.persistence./g"
Bash

8. OSS Support
extended

9. In October 2022, the Apache Geode project failed to secure at
least three voting members on the PMC required to maintain
and manage the Apache Geode Project, after which it was
moved to the foundations Attic.
Spring Data for Apache Geode
discontinued

10. Spring Data for Apache Geode

11. digital mixer, public domain cc0 - https://www.rawpixel.com/image/5920690

14. jar
native - image

16. @Bean
public MongoManagedTypes managedTypes() {
return MongoManagedTypes.from(Customer.class, Order.class);
}
From Spring Native to Boot 3
Thursday, Jan 26 ‘23

18. Micrometer
integtration
Apache Cassandra
MongoDB
Redis
Traces Metrics
Logs
Observability of Your Application
Wednesday, Jan 25 ‘23

20. management.metrics.mongo.command.enabled=false
Observability
Data MongoDB
< 3.1

21. @SpringBootApplication
public class SpringDataMongodbObservabilityApplication {
@Bean
CommandLineRunner initDatabase(EmployeeRepository repository, ObservationRegistry registry) {
// ...
}
@Bean
MongoClientSettingsBuilderCustomizer mongoContextProvider(ObservationRegistry registry) {
return (clientSettingsBuilder) ->
clientSettingsBuilder.contextProvider(ContextProviderFactory.create(registry))
.addCommandListener(new MongoObservationCommandListener(registry));
}
}
Observability
Data MongoDB

22. @SpringBootApplication
public class SpringDataMongodbObservabilityApplication {
@Bean
CommandLineRunner initDatabase(EmployeeRepository repository, ObservationRegistry registry) {
return args -> {
Observation.createNotStarted("init-database", registry).observe(() -> {
repository.save(new Employee("Frodo", "ring bearer"));
repository.save(new Employee("Bilbo", "burglar"));
});
};
}
@Bean
MongoClientSettingsBuilderCustomizer mongoContextProvider(ObservationRegistry registry) {
return (clientSettingsBuilder) ->
clientSettingsBuilder.contextProvider(ContextProviderFactory.create(registry))
.addCommandListener(new MongoObservationCommandListener(registry));
}
}
Observability
Data MongoDB

24. Data JPA

25. @Query(value = "select u.* from User u", queryRewriter = TenantQRW.class)
List<User> findUsers(Pageable pageable);
static class TenantQRW implements QueryRewriter {
@Override
public String rewrite(String query, Sort sort) {
return query + " WHERE u.tenantId = " + context.getTenantId();
}
}
Data JPA
Query Rewriter

26. Data JDBC

27. @Query("SELECT * FROM person WHERE username = :#{ principal?.username }")
Person findActiveUser();
Data JDBC
SpEL Expressions

28. @EnableJdbcRepositories
static class AppConfiguration {
// ...
@Bean
BeforeConvertCallback<Person> idGenerator() {
return p -> p.withId(UUID.randomUUID());
}
}
Data JDBC
Lifecycle Events & Callbacks

29. Data JDBC
Operation Batching
A B

30. Data JDBC
Operation Batching
A B

31. Data MongoDB

32. template.createView("firstYears", Student.class, match(where("year").is(1)));
Data MongoDB
Views

33. Person existing = template.update(Person.class)
.matching(where("firstname").is("Harry"))
.apply(new Update().inc("age", 1))
.findAndModifyValue();
@Update("{ '$inc' : { 'age' : ?1 } }")
Person findAndIncrementAgeByFirstname(String firstname, int increment);
Data MongoDB
findAndModify

34. Data MongoDB
Aggregations

35. Aggregation.stage(search(exists(fieldPath("age"))));
Data MongoDB
Aggregations
spring-data
mongodb-driver

36. Data Redis

37. public class User {
@JsonView(Basic.class)
private int id;
@JsonView(Basic.class)
private String name;
@JsonView(Detailed.class)
private String email;
}
Data Redis
Object Mapping
new GenericJackson2JsonRedisSerializer(objectMapper, JacksonObjectReader.create(),
(mapper, source) -> mapper.writerWithView(Basic.class).writeValueAsBytes(source)
);

38. What’s next?

39. Single Select
queries
A
B C
⋈
naïve join

40. Single Select
queries
A
B C
⋈
analytic join

41. public class Person {
String id;
String name;
@EncryptedField(algorithm = SHA_512_Deterministic)
String ssn;
@EncryptedField(algorithm = SHA_512_Random, altKeyName = "secretKey")
String wallet;
@EncryptedField(algorithm = SHA_512_Random, altKeyName = "/name")
Address address;
}
Encryption
client side

42. public class Person {
String id;
String name;
@EncryptedField(algorithm = SHA_512_Deterministic)
String ssn;
@EncryptedField(algorithm = SHA_512_Random, altKeyName = "secretKey")
String wallet;
@EncryptedField(algorithm = SHA_512_Random, altKeyName = "/name")
Address address;
}
Encryption
client side
{
"_id": "ff3-4567-ee",
"name": "chris",
"ssn": {
"$binary": {
"base64": "AVpT0rwbK0P
"subType": "06"
}
},
"wallet": {
"$binary": {
"base64": "AlpT0rwbK0P
"subType": "06"
}
},
"address": {
"$binary": {
"base64": "+T3C+n4HOBF
"subType": "06"
}
},
"_class": ”example.Person"
}