Difference between revisions of "Hibernate"

Revision as of 03:44, 27 June 2022

Hibernate's goal is to relieve the developer from 95 percent of common data persistence related programming tasks, compared to manual coding with SQL and the JDBC API.

Hibernate Core for Java generates SQL for you, relieves you from manual JDBC result set handling and object conversion, and keeps your application portable to all SQL databases.^[1].

NHibernate

Hibernate is also available in a .net variation called NHibernate: http://community.jboss.org/wiki/NHibernateforNET

Library

Configuration

The Configuration can of Hibernate Object to Table mapping could be achieve by either of:

1. XML file by the default name of "hibernate.cfg.xml" or some other name (through customized configuration settings) that can be passed in by default location (root of src folder), by file path, remote URL or as a Hibernate configuration object (pre-defined/loaded)
2. Annotations such as @Entity and @Table that enable

• Hibernate Configuration options: http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html#configuration-hibernatejdbc

SessionFactory

Provides context to the session (pulls in configuration details to enable access to DB). Typically single SessionFactory per application (and lasts for full application lifecycle).

Session

Acts as the persistence manager (central controller) that allows you to retrieve Objects to get data from the Hibernate cache. Any Transaction starts at the Session.

Transaction

The Transaction is a single operation (such as Create=INSERT, Read=SELECT, UPDATE, DELETE) carried out within a given Session.

Entity

Entities can be associated with one Session (attached), and are implicitly attached to the Session from which they were obtained (explicitly attached when saving for the first time or after using an attach method; implicitly detached after Session closed). ^[2]

OGM

Hibernate Object/Grid Mapper (OGM) provides Java Persistence (JPA) support for NoSQL solutions. It reuses Hibernate ORM’s engine but persists entities into a NoSQL datastore instead of a Relational Database. Hibernate OGM's project page boasts: "Many NoSQL stores, one standard way to access them" and support for a "wide range of backends" via store-specific dialects. Currently, there is production-grade support for

1. Key/Value: Infinispan, Ehcache
2. Document: MongoDB
3. Graph: Neo4j

• Hibernate OGM: http://hibernate.org/ogm/

Tools

• Hibernate Tools: http://hibernate.org/tools/
• Maven & Gradle "Hibernate Enhance" plugin: https://vladmihalcea.com/maven-gradle-hibernate-enhance-plugin/

Resources

• Hibernate 4.2 JAVADOCS: http://docs.jboss.org/hibernate/core/4.2/javadocs/
• Hibernate Mapping Cheat Sheet: http://ndpsoftware.com/HibernateMappingCheatSheet.html
• Hibernate 4 Supported Databases List: http://www.roseindia.net/hibernate/hibernate4/hibernate4databases.shtml
• Hibernate Configuration: http://www.tutorialspoint.com/hibernate/hibernate_configuration.htm
• Learn Hibernate for Java: https://www.hibernate.org/152.html
• Understanding Hibernate <generator> element: http://www.roseindia.net/hibernate/hibernate4/HibernateGeneratorElement.shtml^[3]
• ORM Is an Offensive Anti-Pattern: http://java.dzone.com/articles/orm-offensive-anti-pattern
• Top 5 Courses to Learn Hibernate in Depth: http://dzone.com/articles/5-courses-to-learn-hibernate-in-2019

Tutorials

• How to Create an Application Using Hibernate: http://facestutorials.icefaces.org/tutorial/hibernate-tutorial.html
• Hibernate Quick Guide: http://www.tutorialspoint.com/hibernate/hibernate_quick_guide.htm
• Hibernate tutorials (Viral Patel): http://viralpatel.net/blogs/category/j2ee/hibernate/
• Hibernate tutorials (MK.Yong): http://www.mkyong.com/tutorials/hibernate-tutorials/
• First Hibernate Tutorial – Get Hands on Experience: http://www.skill-guru.com/blog/2009/08/05/first-hibernate-tutorial-%E2%80%93get-hands-on-experience/
• Second Hibernate Tutorial – Get Hands on Experience: http://www.skill-guru.com/blog/2009/10/06/hibernate-tutorial-part-ii/
• How to reverse engineer an Oracle DB with Hibernate: http://www.codeagnostic.com/headline/how-to-reverse-engineer-oracle-database-with-hibernate/
• Don’t Get Caught Hibernating (again): https://mestachs.wordpress.com/2012/06/02/dont-get-caught-hibernating-again/
• Maven 3 + Hibernate 3.6 + Oracle 11g Example (XML Mapping): http://www.mkyong.com/hibernate/maven-3-hibernate-3-6-oracle-11g-example-xml-mapping/
• Upgrading Hibernate 3.3.2 to Hibernate 4.0.0: http://jeff.familyyu.net/2011/09/08/upgrading-hibernate-3-3-2-to-hibernate-4-0-0/
• Using a different persistence provider with AS 7.0.1: http://in.relation.to/Bloggers/UsingADifferentPersistenceProviderWithAS701
• Hibernate Logging Guide – Use the right config for development and production: https://thoughts-on-java.org/hibernate-logging-guide/
• Hibernate Database UPDATE example: http://codeoncloud.blogspot.ca/2012/04/hibernate-database-update-example.html
• Generators <generator> In Hibernate explained: http://www.java4s.com/hibernate/generators-in-hibernate/
• Custom Hibernate Sequence Generator for Id field: http://blog.anorakgirl.co.uk/2009/01/custom-hibernate-sequence-generator-for-id-field/
• Mapping UUID values with ORM 6: https://in.relation.to/2022/05/12/orm-uuid-mapping/
• Hibernate/JPA Identity Generators (as Annotations): http://blog.eyallupu.com/2011/01/hibernatejpa-identity-generators.html
• How To Generate DDL Scripts from Hibernate: http://jandrewthompson.blogspot.ca/2009/10/how-to-generate-ddl-scripts-from.html

• Hibernate Batch processing: http://docs.jboss.org/hibernate/stable/core/manual/en-US/html/batch.html#batch-inserts
• Batch Insertion in Hibernate: http://javainnovations.blogspot.ca/2008/07/batch-insertion-in-hibernate.html
• Bulk fetching with Hibernate: http://koenserneels.blogspot.ch/2013/03/bulk-fetching-with-hibernate.html
• Bulk Data Loading with Hibernate: http://mrmcgeek.blogspot.ca/2010/09/bulk-data-loading-with-hibernate.html
• Hibernate bulk loading - The right way: http://www.vlad-yatsenko.eu/2012/02/hibernate-bulk-loading-optimization/
• Reading Large Result Sets with Hibernate and MySQL: http://www.numerati.com/2012/06/26/reading-large-result-sets-with-hibernate-and-mysql/
• Hibernate Batch Processing – Why you may not be using it. (Even if you think you are): http://abramsm.wordpress.com/2008/04/23/hibernate-batch-processing-why-you-may-not-be-using-it-even-if-you-think-you-are/
• Hibernate -- Bulk Insert/Batch Insert: http://www.roseindia.net/hibernate/HibernateBulkInsertion%20.shtml (full example)
• Batch processing in Hibernate: http://in.relation.to/1716.lace
• Spring Batch and Hibernate (LESSONS LEARNED): http://www.andersen-gott.com/2011/11/spring-batch-and-hibernate.html
• Careful With Native SQL in Hibernate: http://www.javacodegeeks.com/2014/03/careful-with-native-sql-in-hibernate.html
• Using Spring with JPA or Hibernate: http://www.kevinhooke.com/2012/11/15/using-spring-with-jpa-and-hibernate/
• A beginner’s guide to transaction isolation levels in enterprise Java: http://vladmihalcea.com/2014/12/23/a-beginners-guide-to-transaction-isolation-levels-in-enterprise-java/

• Hibernate’s Query APIs -- JPQL .vs. Criteria .vs. direct SQL: https://thorben-janssen.com/hibernates-query-apis/
• Query pagination with JPA & Hibernate: https://vladmihalcea.com/query-pagination-jpa-hibernate/
• Hibernate Tips -- How To Map an Entity to a Query: https://thoughts-on-java.org/hibernate-tips-how-to-map-an-entity-to-a-query/
• Why, When and How to Use DTO Projections with JPA and Hibernate: https://thoughts-on-java.org/dto-projections/
• Ultimate Guide to JPQL Queries with JPA and Hibernate: https://thoughts-on-java.org/jpql/
• Ultimate Guide – Association Mappings with JPA and Hibernate: https://thoughts-on-java.org/ultimate-guide-association-mappings-jpa-hibernate/
• Using the Optimal Query Approach and Projection for JPA and Hibernate: https://thoughts-on-java.org/optimal-query-and-projection-jpa-hibernate/
• The best way to prevent JPA and Hibernate performance issues: https://vladmihalcea.com/jpa-hibernate-performance-issues/
• Bulk UPDATE and DELETE with JPA & Hibernate: https://vladmihalcea.com/bulk-update-delete-jpa-hibernate/
• Nesting Collections With jOOQ 3.14’s SQL/XML or SQL/JSON support: https://blog.jooq.org/2020/10/09/nesting-collections-with-jooq-3-14s-sql-xml-or-sql-json-support/

• NoSQL with Hibernate OGM -- Part One - Persisting Your First Entities: http://java.dzone.com/articles/nosql-hibernate-ogm-part-one-0
• How to use CockroachDB with Hibernate: https://thorben-janssen.com/hibernate-cockroachdb/
• Keyset Pagination with JPA and Hibernate: https://vladmihalcea.com/keyset-pagination-jpa-hibernate/
• The best way to log SQL statements with Spring Boot: https://vladmihalcea.com/log-sql-spring-boot/
• Naming Strategies in Hibernate 5: https://thorben-janssen.com/naming-strategies-in-hibernate-5/
• Hibernate 6 & JPQL Window Functions: https://vladmihalcea.com/hibernate-jpql-window-functions/
• How to configure List semantics in Hibernate 6: https://thorben-janssen.com/hibernate-list-semantics/

External Links

• wikipedia: Data access object
• wikipedia: Object-relational impedance mismatch
• Hibernate 1st whitepaper (2005): http://www.jboss.com/pdf/HibernateBrochure-Jun2005.pdf
• Hibernate Development/Integration approaches: https://www.hibernate.org/355.html
• The Spring series, Part 2: When Hibernate meets Spring (2005): http://www.ibm.com/developerworks/web/library/wa-spring2/
• Developing Struts Hibernate and Spring Based Login/Registration Application: http://www.roseindia.net/struts/hibernate-spring/index.shtml
• First steps using Struts and Hibernate (visual step-by-step): http://www.laliluna.de/struts-hibernate-integration-tutorial-en.html
• Hibernate Core for Java: https://www.hibernate.org/344.html
• Struts, Hibernate and Spring: A guide to creating a dynamic web application (2007): http://edn.embarcadero.com/article/36524
• Spring MVC Fast Tutorial: http://maestric.com/doc/java/spring
• Spring – Hibernate – JAX-RS Putting Hibernate to REST: http://raulraja.com/2009/08/27/spring-hibernate-jax-rs-putting-hibernate-to-rest/
• Hibernate .vs. JPA .vs. JDO: http://stackoverflow.com/questions/530215/hibernate-vs-jpa-vs-jdo-pros-and-cons-of-each
• Oracle + Hibernate sequence madness!: http://sabbour.wordpress.com/2007/04/22/oracle-hibernate-sequence-madness/
• Hibernate Id Generation and Oracle Sequences: http://mcatr.blogspot.ca/2010/12/hibernate-id-generation-and-oracle.html
• Before Insert Trigger and ID generator: https://forum.hibernate.org/viewtopic.php?p=2364977#2364977
• ORACLE - Sequence Pseudocolumns: http://docs.oracle.com/cd/E11882_01/server.112/e26088/pseudocolumns002.htm#SQLRF50946
• Commit for a SELECT in HelloWorld? IMHO not a good move!: https://forum.hibernate.org/viewtopic.php?p=2374308
• Martin Fowler on ORM Hate: http://java.dzone.com/articles/martin-fowler-orm-hate
• Naming Strategies in Hibernate 5: https://thoughts-on-java.org/naming-strategies-in-hibernate-5/
• Common Hibernate Exceptions Every Developer Must Know: https://thorben-janssen.com/hibernate-exceptions/
• Sequence naming strategies in Hibernate 6: https://thorben-janssen.com/sequence-naming-strategies-in-hibernate-6/
• How to implement an AttributeConverter to support custom types: https://thorben-janssen.com/jpa-attribute-converter/

References

1. ↑ Hibernate project home: https://www.hibernate.org/
2. ↑ Difference between Entity in JPA and Hibernate: http://stackoverflow.com/questions/955515/difference-between-jpa-entity-and-hibernate-entity
3. ↑ Hibernate 3 <generator> element: http:///www.roseindia.net/hibernate/hibernateidgeneratorelement.shtml

See Also

Database | SQL | RDBMS | ORM | Java/JPA | ASP.NET/LINQ | PHP/PDO