The Hibernate project: movingforward to NewSQL and

beyondSanne Grinovero Hibernate team

Sr Principal Software Engineer Red Hat

Take awayRefresh of Hibernate

Overview of Hibernate projects

What’s new?

What’s next?

Sanne Grinovero10+ years working with & on Hibernate

Team blog: Twitter:

in.relation.to@SanneGrinovero

Contributing to many more OSS projects in the data space

Apache Lucene, Elasticsearch

WildFly, JBoss Enterprise Application Server

In�nispan, JBoss Data Grid

Red Hat, 7+ years

How is it doing?

Let’s take some Maven stats

A,B,C,D are well known, economically viable projects, anonymisedfor their protection

… then include Hibernate stats

The scale had to change. {A..D} hare not missing.

Need to use a Logarithmicscale ?!

Looking at geographicalusage

Bangalore, India has most daily downloads

Guess China ?

Java Persistence APIJPA

Hibernate implements the standard interface

The Hibernate community in�uences next gen spec

Recruiters get very confused

Hibernate Portfolio

EcosystemJava EE (JPA implementation, JBoss EAP, WildFly)

Spring, Spring Boot

Groovy / Grails

Many many more!

loads of tooling

Hibernate ORM 5

CleanupBootstrap via well de�ned phases

Modularity

WildFly, OSGi, Java 9

extensions, integration points with ORM

Performance

Java8: Date and TimeDATE: java.time.LocalDate

TIME: java.time.LocalTime, java.time.OffsetTime

TIMESTAMP: java.time.Instant, java.time.LocalDateTime,java.time.OffsetDateTime and java.time.ZonedDateTime

AutoClosable, Genericstry ( Session session = sessionFactory.openSession() ) { Address address = session.get(Address.class, id); return address.getCity(); }

AutoClosable resources:

Session / StatelessSession

SessionFactory

ScrollableResults

Bytecode instrumentationSmarter change detection

Better Maven and Gradle support

Lazy loading of properties

sub-groups

Automatic bi-directional management

Association management -before

//Create relation Order order = new Order(); LineItem lineItem = new LineItem(); order.getLineItems().add( lineItem ); lineItem.setOrder( order );

//Relation established: lineItem.getOrder().getName();

Association management -after

//Create relation Order order = new Order(); LineItem lineItem = new LineItem(); order.getLineItems().add( lineItem ); //lineItem.setOrder( order ); Not required!

//Relation established: lineItem.getOrder().getName(); // NPE automatically prevented!

ByteBuddyNew ByteButty based enhancer, thanks to Rafael Winterhalter

To replace Javassist?

No runtime dependency

Based on ASM

SAP HANAA new exotic database…

Support for the powerful SAP HANA "in memory data platform"

Thanks to the SAP engineers!

Not just a new Dialect

What’s next?

Second level cacheOptimisations on the key types

Cache by reference (immutable entities)

JCache integration point

Second level cache, byreference

<property name="hibernate.cache.use_reference_entries" values=“true"/>

@Entity @Immutable @Cacheable @Cache( usage = CacheConcurrencyStrategy.READ_ONLY ) public class MyReferenceData { @Id private Integer id; private String name; private String theValue; .... }

Hibernate Search

Full-text searchInverted index

Object level

Clustered

Elasticsearch

What is new in 5+?Upgrade Lucene without breaking APIs

Signi�cant perf improvements

since 5.6: Elasticsearch !

WildFly Swarm and Spring Boot

An @Indexed @Entity@Indexed @Entity public class Address { @Id Integer id;

@Field String street1;

@Field(analyze=NO) @SortableField @Facet String city;

@IndexedEmbedded Country country;

... }

What’s coming in HibernateSearch 6?

Full abstraction from Lucene API

easier to plug additional full-text engines

HANA?

Hibernate OGMAn ORM for NOSQL ? OMG!!

JPA for NoSQLMongoDB

In�nispan

Neo4J

Redis

EhCache

Cassandra

CouchDB

First steps to get started<dependencies> <dependency> <groupId>org.hibernate.ogm</groupId> <artifactId>hibernate-ogm-neo4j</artifactId> </dependency> </dependencies>

<persistence> <persistence-unit name="ogm-neo4j" transaction-type="JTA"> <!-- Use Hibernate OGM provider: configuration will be transparent --> <provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider> <properties> <property name="hibernate.ogm.datastore.provider" value="neo4j"/> </properties> </persistence-unit> </persistence>

How to use OGMIt’s just JPA!

Java Persistence API

How to integrate with OGMIt’s just Hibernate!

Hibernate Validator

Bean Validation 2.0beanvalidation.org

class User { @Email String email; @Positive int age; @NotNull @Size(max=50) String firstName; }

@Stateless class UserService { public void createUser(@Valid @NotNull User user) { ... } }

Collections and othercontainers

public class User { @Size(max=10) public List<@NotNull @Email String> emails;

Optional<@Email String> defaultEmail; }

Validator 6: faster!http://in.relation.to/2017/10/31/bean-validation-benchmark-

revisited/

Hibernate Spatial

Hibernate Search Spatial vsHibernate Spatial

Hibernate Search uses Lucene indices outside of the database

can be combined with full-text, relevance "fuzzy logic"

Hibernate (ORM) Spatial uses RDBMS spatial functions

Oracle DB, Postgis (PostgreSQL), MySQL, GeoDB (H2),SQLServer, HANA

Code !org.hibernate:hibernate-spatial

hibernate.dialect=org.hibernate.spatial.dialect.postgis.Postgis

@Entity(name = "Event") public class Event {

@Id Long id;

@Type(type = "jts_geometry") Point location; }

QueryEvent event = entityManager.createQuery( "select e " + "from Event e " + "where within(e.location, :filter) = true", Event.class) .setParameter("filter", new WKTReader().read( "POLYGON((1 1,20 1,20 20,1 20,1 1))")) .getSingleResult();

Hibernate EnversIs getting more love

Hibernate 6 & beyond

Semantic Query ModelRefactoring Hibernate’s Type contract to unify Hibernate ORM, JPAand SQM type systems

Query and SQL execution performance

Migration to SQM for query interpretation/representationHQL/JPQL

(JPA) criteria queries

And much more… Jandex based annotation scanning

Always more performance

new Connection pool integrations

Using new tools extensively during design: JMH, java-object-layout

OSGi, Java 9: better modularity

Java 9Hibernate ORM → just works

Hibernate Validator → just works

Hibernate Search → just works

Hibernate OGM → WIP, depends on the NoSQL database

Not as modules yet!

ConclusionsReliable yet innovating

Comprehensive data platform

way beyond the 10y old relational-only ORM !

A friendly, open, deeply technical community

Q&ATry Hibernate *, you’ll love them

Contribute: feedback, battle stories, advice, code, (failing) tests..

http://hibernate.org/