This document provides an overview and introduction to Hibernate. It discusses what Hibernate is, the benefits it provides, and the basic components and process for using Hibernate in an application. Key topics covered include Object-Relational Mapping, Hibernate configuration, mapping objects to tables, creating the Hibernate session factory, and using Hibernate to communicate with the database. The document also includes examples of mapping a Java class to a database table and using Hibernate in code.
Hibernate is an object-relational mapping tool that allows developers to more easily write applications that interact with relational databases. It does this by allowing developers to map Java classes to database tables and columns, so that developers can interact with data through Java objects rather than directly with SQL statements. Hibernate handles the conversion between Java objects and database rows behind the scenes. Some key benefits of using Hibernate include faster data retrieval, avoiding manual database connection management, and easier handling of database schema changes.
This document summarizes Hibernate, an object-relational mapping tool for Java. It discusses how Hibernate provides APIs for storing and retrieving Java objects from a database, maps Java classes to database tables, and minimizes database access through caching and fetching strategies. The document also includes examples of Hibernate configuration files and mappings that define relationships between entities.
The document discusses Hibernate, an object-relational mapping tool that transforms data between object representation and relational databases. It describes Hibernate's architecture, important definitions like SessionFactory and Session, configuration options including programmatic and XML configuration, mapping declarations, and persistent classes.
Flush() synchronizes the database with pending changes in the persistence context. Close() ends the session and detaches all objects. Clear() detaches all objects but keeps the session open, allowing further work before needing to
The document discusses the Java Persistence API (JPA) and Hibernate framework. It provides an overview of JPA's main features, the five steps to implement JPA using Hibernate, and the components that make up Hibernate.
The document discusses using Hibernate, an object-relational mapping framework, to provide object persistence and retrieval by mapping Java objects to database tables. It explains what Hibernate does, its features like object-relational mapping and transaction management, and provides examples of persisting and retrieving objects using Hibernate's API. The document also shows how to configure a Hibernate project and map classes and associations between objects and database tables.
A powerful ORM tool to design data base access layer.
Fills gaps of mismatches between OOPs and RDBMS paradigm. Also maintains adequate ultra performance of database access.
An automated, configurable persistence of java objects with tables in data base.
May not be a good solution for data-centric application which uses only stored procedures to implement business logic in the database.
Hibernate is an object-relational mapping tool that allows developers to more easily write applications that interact with relational databases. It does this by allowing developers to map Java classes to database tables and columns, so that developers can interact with data through Java objects rather than directly with SQL statements. Hibernate handles the conversion between Java objects and database rows behind the scenes. Some key benefits of using Hibernate include faster data retrieval, avoiding manual database connection management, and easier handling of database schema changes.
This document summarizes Hibernate, an object-relational mapping tool for Java. It discusses how Hibernate provides APIs for storing and retrieving Java objects from a database, maps Java classes to database tables, and minimizes database access through caching and fetching strategies. The document also includes examples of Hibernate configuration files and mappings that define relationships between entities.
The document discusses Hibernate, an object-relational mapping tool that transforms data between object representation and relational databases. It describes Hibernate's architecture, important definitions like SessionFactory and Session, configuration options including programmatic and XML configuration, mapping declarations, and persistent classes.
Flush() synchronizes the database with pending changes in the persistence context. Close() ends the session and detaches all objects. Clear() detaches all objects but keeps the session open, allowing further work before needing to
The document discusses the Java Persistence API (JPA) and Hibernate framework. It provides an overview of JPA's main features, the five steps to implement JPA using Hibernate, and the components that make up Hibernate.
The document discusses using Hibernate, an object-relational mapping framework, to provide object persistence and retrieval by mapping Java objects to database tables. It explains what Hibernate does, its features like object-relational mapping and transaction management, and provides examples of persisting and retrieving objects using Hibernate's API. The document also shows how to configure a Hibernate project and map classes and associations between objects and database tables.
A powerful ORM tool to design data base access layer.
Fills gaps of mismatches between OOPs and RDBMS paradigm. Also maintains adequate ultra performance of database access.
An automated, configurable persistence of java objects with tables in data base.
May not be a good solution for data-centric application which uses only stored procedures to implement business logic in the database.
The document discusses Java Persistence API (JPA) and Hibernate, which are frameworks that help map objects to relational databases and resolve the impedance mismatch between object-oriented and relational models. JPA is a specification that providers like Hibernate implement. Hibernate is an object/relational mapping tool that provides object/relational mapping, object/relational persistence services, and query capabilities. It generates database schemas from object models and vice versa. The document also provides examples of performing basic CRUD operations using JPA and SQL.
Hibernate is an ORM tool that allows developers to map Java objects to database tables. It provides functionality for CRUD operations and querying through HQL or criteria queries. Hibernate supports various levels of object mapping from pure relational to full object mapping. It improves productivity and maintainability by reducing boilerplate code and providing vendor independence. Core interfaces include Session, SessionFactory, Configuration and Transaction interfaces.
Hibernate is an object-relational mapping tool for Java that allows developers to persist Java objects to a relational database in a transparent way. It provides transparent persistence without needing to flatten objects or write database specific code. Hibernate uses an object-oriented query language that closely resembles SQL to retrieve and manipulate persisted objects.
GlassFish is the open source application server that implements the Java EE platform, and version 3 will include new features from Java EE 6 like profiles, pruning of older technologies, and improved extensibility and ease of development for web applications through annotations and simplified packaging. GlassFish version 2 currently provides high performance, clustering, web and RESTful services, and integration with frameworks and tools to simplify development of enterprise Java applications.
Tune my Code! Code-Versionen testen via Edition-Based Redef. - Jérôme Witt, d...dbi services
Edition based redefinition allows online application upgrades in Oracle Database 11gR2. It works by creating new editions that contain redefined objects while keeping prior editions available. Redefinition involves creating a new edition, selecting it, recompiling or recreating objects, and then permanently switching to the new edition. Advanced features include editioning views to share data across editions and crossedition triggers to propagate changes. Performance must be considered when using multiple editions.
Introduction to JPA and Hibernate including examplesecosio GmbH
In this talk, held as part of the Web Engineering lecture series at Vienna University of Technology, we introduce the main concepts of Java Persistence API (JPA) and Hibernate.
The first part of the presentation introduces the main principles of JDBC and outlines the major drawbacks of JDBC-based implementations. We then further outline the fundamental principles behind the concept of object relation mapping (ORM) and finally introduce JPA and Hibernate.
The lecture is accompanied by practical examples, which are available on GitHub.
ORM stands for Object/Relational mapping. It is the programmed and translucent perseverance of objects in a Java application in to the tables of a relational database using the metadata that describes the mapping between the objects and the database. An ORM solution comprises of an API for CRUD operations, a language for specifying queries, ability to specify mapping metadata, and techniques for interacting with transactional objects. There are four levels of ORM quality ranging from pure relational to full object mapping.
The document discusses transactions in professional open source software. It describes how transactions ensure all-or-nothing atomicity by committing or rolling back all operations together. The ACID properties of transactions - atomicity, consistency, isolation, and durability - are defined. Programmatic transaction demarcation using JDBC, JTA, and Hibernate interfaces is covered. Contextual sessions in Hibernate and configuration for different transaction contexts like JTA are also summarized.
In this Java Spring Training session, you will learn Spring AOP – Aspect Oriented Programming Topics covered in this session are:
For more information, visit this link:
• Auto-wiring
• Annotations based configuration
• Java based configuration
https://www.mindsmapped.com/courses/software-development/spring-fundamentals-learn-spring-framework-and-spring-boot/
In this Java Hibernate Training session, you will learn Hibernate. Topics covered in this session are:
• Hibernate
• Advantage of hibernate
• Hibernate Architecture
• Hibernate project
• Hibernate with Annotations
• DAO Design Pattern in Java
For more information, visit this link:
https://www.mindsmapped.com/courses/software-development/learn-hibernate-fundamentals-from-scratch/
Current big data technology scope overview prepared for V.I.Tech and Wellcentive companies. Answers questions why we are taking these products and what do we really do with them on very high level.
The document discusses transactions and transaction management in Hibernate. It describes the ACID properties that transactions should satisfy, including being atomic, consistent, isolated, and durable. It explains how to demarcate transactions programmatically using the Hibernate Transaction interface or JTA UserTransaction interface. It also discusses contextual sessions in Hibernate and different implementations of the CurrentSessionContext interface for managing the current session scope. Finally, it provides information on configuring Hibernate to use JTA for managed transactions in an application server environment.
The document provides information about preparing for a technical interview, including:
- Check the company profile, areas of interest, and domain to understand what may be asked.
- Be prepared to discuss your fundamental computer engineering knowledge as well as one or two subjects you are interested in and knowledgeable about.
- Also prepare to discuss your past project work and the latest technologies.
- Key topics that may be covered include C, C++, data structures, algorithms, databases, operating systems, networks, and various programming languages.
- Understanding pointers, memory allocation functions, structures, unions, classes, inheritance and polymorphism in C/C++ is also important for technical interviews.
The document discusses the differences between JDK and JRE, copy constructors in Java, early and late binding, method signatures, and overriding methods to throw exceptions. It provides answers to common Java questions. JDK is for development and contains tools like compilers, while JRE is for running Java programs and contains the JVM. Copy constructors create identical object copies. Early binding resolves calls at compile-time while late binding occurs at runtime. A method signature contains its name and parameter types. Overridden methods can declare unchecked exceptions or the same checked exception as the parent method.
First slide of Hadoop:
* Introduction to Big Data and Hadoop:
- Presenting and defining big data
- Introducing Hadoop and History
- Hadoop - how it works?
- HDFS
Java Web Programming [3/9] : Servlet AdvancedIMC Institute
This document provides an overview of servlet advanced topics including including, forwarding to, and redirecting to other web resources. It discusses servlet and JDBC integration including using prepared statements and callable statements. It also covers session tracking APIs and how they can be used to maintain state across HTTP requests through different mechanisms like cookies or URL rewriting. Finally, it briefly introduces servlet scopes, listeners, and filters.
Hibernate Query Language (HQL) is an object-oriented query language, similar to SQL, but instead of operating on tables and columns, HQL works with persistent objects and their properties. HQL queries are translated by Hibernate into conventional SQL queries which in turns perform action on database.
Hibernate is an object/relational mapping tool that maps objects to a relational database. The document provides an overview of key Hibernate concepts like the SessionFactory, Session, persistent and transient objects, and transactions. It also discusses Hibernate tools for mapping files, schema generation, code generation, and configuration via properties files. An example mapping of music tracks, artists, and comments is presented to demonstrate basic Hibernate functionality.
This document provides an overview of Hibernate, an object-relational mapping tool for Java. It begins with a list of topics covered and then defines what Hibernate and JDBC are. It describes the Hibernate architecture including configuration, sessions, and mapping. It also discusses annotations, HQL, caching and batch processing. The document provides details on configuring Hibernate with different databases as well as mapping files and object-relational mappings. It explains the use of annotations, HQL, criteria queries, and native SQL with Hibernate.
The document provides information about Hibernate, including:
1) Hibernate is an open-source object-relational mapping tool for Java that simplifies interaction between Java objects and relational databases.
2) It discusses Hibernate's architecture including the Configuration, SessionFactory, Session, Transaction, and Query objects.
3) Examples are provided of configuring Hibernate using annotations and XML files, performing basic CRUD operations, and mapping different relationship types like one-to-one and one-to-many.
In this session, you will learn:
1. Hibernate
2. Advantages of Hibernate
3. Hibernate Architecture – High Level
4. Hibernate – Detailed Architecture
5. Hibernate Architecture – Important Levels
6. Hibernate jar files
7. Hibernate tools download
8. CRUD Operations
9. Hibernate with Annotations
10. Design Patterns in Java
Hibernate sits between traditional Java things and information source server to handle everything in persisting those things based on the appropriate O/R systems and styles.
The document discusses Java Persistence API (JPA) and Hibernate, which are frameworks that help map objects to relational databases and resolve the impedance mismatch between object-oriented and relational models. JPA is a specification that providers like Hibernate implement. Hibernate is an object/relational mapping tool that provides object/relational mapping, object/relational persistence services, and query capabilities. It generates database schemas from object models and vice versa. The document also provides examples of performing basic CRUD operations using JPA and SQL.
Hibernate is an ORM tool that allows developers to map Java objects to database tables. It provides functionality for CRUD operations and querying through HQL or criteria queries. Hibernate supports various levels of object mapping from pure relational to full object mapping. It improves productivity and maintainability by reducing boilerplate code and providing vendor independence. Core interfaces include Session, SessionFactory, Configuration and Transaction interfaces.
Hibernate is an object-relational mapping tool for Java that allows developers to persist Java objects to a relational database in a transparent way. It provides transparent persistence without needing to flatten objects or write database specific code. Hibernate uses an object-oriented query language that closely resembles SQL to retrieve and manipulate persisted objects.
GlassFish is the open source application server that implements the Java EE platform, and version 3 will include new features from Java EE 6 like profiles, pruning of older technologies, and improved extensibility and ease of development for web applications through annotations and simplified packaging. GlassFish version 2 currently provides high performance, clustering, web and RESTful services, and integration with frameworks and tools to simplify development of enterprise Java applications.
Tune my Code! Code-Versionen testen via Edition-Based Redef. - Jérôme Witt, d...dbi services
Edition based redefinition allows online application upgrades in Oracle Database 11gR2. It works by creating new editions that contain redefined objects while keeping prior editions available. Redefinition involves creating a new edition, selecting it, recompiling or recreating objects, and then permanently switching to the new edition. Advanced features include editioning views to share data across editions and crossedition triggers to propagate changes. Performance must be considered when using multiple editions.
Introduction to JPA and Hibernate including examplesecosio GmbH
In this talk, held as part of the Web Engineering lecture series at Vienna University of Technology, we introduce the main concepts of Java Persistence API (JPA) and Hibernate.
The first part of the presentation introduces the main principles of JDBC and outlines the major drawbacks of JDBC-based implementations. We then further outline the fundamental principles behind the concept of object relation mapping (ORM) and finally introduce JPA and Hibernate.
The lecture is accompanied by practical examples, which are available on GitHub.
ORM stands for Object/Relational mapping. It is the programmed and translucent perseverance of objects in a Java application in to the tables of a relational database using the metadata that describes the mapping between the objects and the database. An ORM solution comprises of an API for CRUD operations, a language for specifying queries, ability to specify mapping metadata, and techniques for interacting with transactional objects. There are four levels of ORM quality ranging from pure relational to full object mapping.
The document discusses transactions in professional open source software. It describes how transactions ensure all-or-nothing atomicity by committing or rolling back all operations together. The ACID properties of transactions - atomicity, consistency, isolation, and durability - are defined. Programmatic transaction demarcation using JDBC, JTA, and Hibernate interfaces is covered. Contextual sessions in Hibernate and configuration for different transaction contexts like JTA are also summarized.
In this Java Spring Training session, you will learn Spring AOP – Aspect Oriented Programming Topics covered in this session are:
For more information, visit this link:
• Auto-wiring
• Annotations based configuration
• Java based configuration
https://www.mindsmapped.com/courses/software-development/spring-fundamentals-learn-spring-framework-and-spring-boot/
In this Java Hibernate Training session, you will learn Hibernate. Topics covered in this session are:
• Hibernate
• Advantage of hibernate
• Hibernate Architecture
• Hibernate project
• Hibernate with Annotations
• DAO Design Pattern in Java
For more information, visit this link:
https://www.mindsmapped.com/courses/software-development/learn-hibernate-fundamentals-from-scratch/
Current big data technology scope overview prepared for V.I.Tech and Wellcentive companies. Answers questions why we are taking these products and what do we really do with them on very high level.
The document discusses transactions and transaction management in Hibernate. It describes the ACID properties that transactions should satisfy, including being atomic, consistent, isolated, and durable. It explains how to demarcate transactions programmatically using the Hibernate Transaction interface or JTA UserTransaction interface. It also discusses contextual sessions in Hibernate and different implementations of the CurrentSessionContext interface for managing the current session scope. Finally, it provides information on configuring Hibernate to use JTA for managed transactions in an application server environment.
The document provides information about preparing for a technical interview, including:
- Check the company profile, areas of interest, and domain to understand what may be asked.
- Be prepared to discuss your fundamental computer engineering knowledge as well as one or two subjects you are interested in and knowledgeable about.
- Also prepare to discuss your past project work and the latest technologies.
- Key topics that may be covered include C, C++, data structures, algorithms, databases, operating systems, networks, and various programming languages.
- Understanding pointers, memory allocation functions, structures, unions, classes, inheritance and polymorphism in C/C++ is also important for technical interviews.
The document discusses the differences between JDK and JRE, copy constructors in Java, early and late binding, method signatures, and overriding methods to throw exceptions. It provides answers to common Java questions. JDK is for development and contains tools like compilers, while JRE is for running Java programs and contains the JVM. Copy constructors create identical object copies. Early binding resolves calls at compile-time while late binding occurs at runtime. A method signature contains its name and parameter types. Overridden methods can declare unchecked exceptions or the same checked exception as the parent method.
First slide of Hadoop:
* Introduction to Big Data and Hadoop:
- Presenting and defining big data
- Introducing Hadoop and History
- Hadoop - how it works?
- HDFS
Java Web Programming [3/9] : Servlet AdvancedIMC Institute
This document provides an overview of servlet advanced topics including including, forwarding to, and redirecting to other web resources. It discusses servlet and JDBC integration including using prepared statements and callable statements. It also covers session tracking APIs and how they can be used to maintain state across HTTP requests through different mechanisms like cookies or URL rewriting. Finally, it briefly introduces servlet scopes, listeners, and filters.
Hibernate Query Language (HQL) is an object-oriented query language, similar to SQL, but instead of operating on tables and columns, HQL works with persistent objects and their properties. HQL queries are translated by Hibernate into conventional SQL queries which in turns perform action on database.
Hibernate is an object/relational mapping tool that maps objects to a relational database. The document provides an overview of key Hibernate concepts like the SessionFactory, Session, persistent and transient objects, and transactions. It also discusses Hibernate tools for mapping files, schema generation, code generation, and configuration via properties files. An example mapping of music tracks, artists, and comments is presented to demonstrate basic Hibernate functionality.
This document provides an overview of Hibernate, an object-relational mapping tool for Java. It begins with a list of topics covered and then defines what Hibernate and JDBC are. It describes the Hibernate architecture including configuration, sessions, and mapping. It also discusses annotations, HQL, caching and batch processing. The document provides details on configuring Hibernate with different databases as well as mapping files and object-relational mappings. It explains the use of annotations, HQL, criteria queries, and native SQL with Hibernate.
The document provides information about Hibernate, including:
1) Hibernate is an open-source object-relational mapping tool for Java that simplifies interaction between Java objects and relational databases.
2) It discusses Hibernate's architecture including the Configuration, SessionFactory, Session, Transaction, and Query objects.
3) Examples are provided of configuring Hibernate using annotations and XML files, performing basic CRUD operations, and mapping different relationship types like one-to-one and one-to-many.
In this session, you will learn:
1. Hibernate
2. Advantages of Hibernate
3. Hibernate Architecture – High Level
4. Hibernate – Detailed Architecture
5. Hibernate Architecture – Important Levels
6. Hibernate jar files
7. Hibernate tools download
8. CRUD Operations
9. Hibernate with Annotations
10. Design Patterns in Java
Hibernate sits between traditional Java things and information source server to handle everything in persisting those things based on the appropriate O/R systems and styles.
ASIT is the best place to Learn the course "HIBERNATE" and build your career and also provides experienced advisers. ASIT provides demo classes for free, and also provide best training and placement services.for more details please visit our website.
Hibernate sits between traditional Java things and information source server to handle everything in persisting those things based on the appropriate O/R systems and styles.
Hibernate is an ORM (object-relational mapping ) tool for Java programming language. It is developed by Red Hat and was started by Gavin King with his colleagues in 2001. The original aim was to offer better persistence capabilities than those offered by EJB2
- get() throws an ObjectNotFoundException if no data is found, while load() returns a proxy object without hitting the database
- When accessing properties of the proxy object returned by load(), it will trigger a SELECT to the database and throw an ObjectNotFoundException if no data exists
- get() immediately hits the database to check for data, while load() defers the database hit until property access if a proxy is returned
- It is generally better to use get() when you expect data to exist, and check for its return value being null, rather than using load()
This document provides an introduction to Hibernate, an object-relational mapping tool. It discusses the problems Hibernate solves like having SQL statements in code and the object-relational impedance mismatch. It outlines the advantages of Hibernate like database abstraction, automatic state changes, and configuration through XML files. It also provides a high-level overview of how Hibernate works by mapping objects to database tables, its configuration file, and object state changes with examples.
Hibernate is an object-relational mapping tool that allows Java objects to be mapped to database tables. It handles the conversion between Java objects and database rows. Hibernate sits between Java objects and a database, handling all persistence-related tasks without requiring any SQL or JDBC code to be written. It supports various databases and technologies and provides APIs for easily storing and accessing Java objects directly from a database. Configuring Hibernate involves setting up configuration files that specify the database connection and class mappings between Java objects and database tables. SessionFactory and Session objects are then used to connect to the database and perform CRUD operations on persistent objects.
YouTube Link: https://youtu.be/2sCAw1EbfEQ
Hibernate Certification: https://www.edureka.co/persistence-with-hibernate-self-paced
This Edureka PPT on "Hibernate Interview Questions" video will help you prepare for the role of a Hibernate Developer.
Follow us to never miss an update in the future.
YouTube: https://www.youtube.com/user/edurekaIN
Instagram: https://www.instagram.com/edureka_learning/
Facebook: https://www.facebook.com/edurekaIN/
Twitter: https://twitter.com/edurekain
LinkedIn: https://www.linkedin.com/company/edureka
Castbox: https://castbox.fm/networks/505?country=in
Hibernate is an ORM tool that provides object/relational mapping and persistence services. It allows developers to work with Java objects instead of SQL and relational data. Hibernate supports different levels of object/relational mapping from pure relational to full object mapping. Some key benefits of Hibernate include increased productivity, maintainability, performance, and vendor independence.
The document provides information about configuring Hibernate, an object-relational mapping tool for Java. It explains how to set up the Hibernate environment by downloading and installing Hibernate and its prerequisites. It also describes the important properties needed in the hibernate.cfg.xml configuration file to connect Hibernate to a MySQL database, including database connection URL, username, password and dialect. An example configuration file for MySQL is given.
The document discusses object-relational mapping (ORM) and Hibernate. It describes how Hibernate provides a layer between a database and application code to abstract away differences in database types. This allows changing the backend database without changing code. Hibernate also maps object-oriented domain models to relational database tables through configuration files or annotations. Examples show how to configure Hibernate and perform basic operations like inserting a record.
Java Hibernate Programming with Architecture Diagram and Examplekamal kotecha
Java Hibernate Introduction, Architecture and Example with step by step guidance to run the program especially for students and teachers.
Learn More @ http://java2all.com/technology/hibernate
Hibernate Interview Questions and AnswersAnuragMourya8
Hibernate is an open-source object-relational mapping (ORM) framework for Java. It provides a mapping between Java objects and relational database tables, allowing developers to work with databases using Java objects directly.
Finally Practice here most popular Hibernate Interview Questions and Answers.
The document outlines an agenda for a Hibernate training that covers generator classes, SQL dialects, collection mapping, relationship mappings like one-to-one and many-to-one, cascade types, lazy loading, transactions, HQL, criteria queries, caching, and includes examples of creating a basic Hibernate project using annotations and performing CRUD operations.
Integration Of Springs Framework In HibernatesSunkara Prakash
The document discusses integrating Spring framework with Hibernate ORM. It explains that Spring overcomes the need to manually handle Hibernate session and transaction management. The key classes and configuration discussed are LocalSessionFactoryBean, HibernateTransactionManager, TransactionProxyFactoryBean, and providing a sample applicationContext XML configuration.
1. Hibernate
Introduction and Overview
>By Manisha
May 2012
2. Agenda
At the end of this course, you should be able to:
Describe the basics of Hibernate
Use Hibernate configuration
Explain basic O/R Mapping
Write simple application in Hibernate
●
Q&A
2 Hibernate Basic May 2012
3. Hibernate
●
ORM technology
Consistent database communication and Increased maintainability: In
Hibernate database communication policies are applied as configuration,
in contrast as to code them in SQL based communication.
Developers with limited SQL knowledge can participate in development
Reduced testing time
Performance Optimization: Fine tuning database communication,
adopting caching strategies can be done with configuration.
Portable code across multiple databases: Hibernate API and HQL can
facilitate database neutral programming.
3 Hibernate Basic May 2012
4. What is ORM?
Object Relational Mapping (ORM) frameworks are those which
encapsulate SQL communication with relational databases, with object-
oriented communication.
ORM is a programming way for converting data between incompatible
type systems in relational databases and object-oriented programming
languages.
Currently, several ORM frameworks such as Entity beans in Enterprise
JavaBeans (EJB), TopLink from Oracle, iBatis, Hibernate, and so on are
available.
4 Hibernate Basic May 2012
5. Difference in conventional and ORM based implementation
Conventional Implementation
Service Data
Access Database
Object
Object
Implementation with ORM
Data
Service Hibernate
Access
Object Database
Object
5 Hibernate Basic May 2012
6. High level Hibernate
Architecture
Application
Persistent Objects
Hibernate
Configuration Mapping
Database
6 Hibernate Basic May 2012
7. Basic content of Hibernate application
In any standard hibernate application will have below data
Pojo class of table
Configuration files(hibernate.cfg.xml)
Mapping file(xxx.hbm.xml)
Application code to create Hibernate Runtime and execute
7 Hibernate Basic May 2012
8. How to use Hibernate for data communication?
Follow these steps to use Hibernate for data communication:
Prepare domain objects (POJO) for table.
Write mapping information.
Write Hibernate configuration.
Create Hibernate Runtime.
Use Hibernate Runtime to communicate with database.
8 Hibernate Basic May 2012
9. Hibernate Example: Prepare pojo object(Class to table mapping)
package com.ibm.tf.hibernate;
public class Employee implements Serializable{
// attributes - relate to business entities
private Integer id;
private firstName;
private lastName;
// accessor and mutator methods
public Integer getId() {
//implementation code
}
….
public void printEmployeeName() {
// some business method
}
}
9 Hibernate Basic May 2012
10. Write mapping information(Table mapping to conf. Xml file)
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<!– Employee class mapping to EMPLOYEE table-->
<class name=" com.ibm.tf.hibernate.Employee“ table=“EMPLOYEE">
<!– identifier column mapping-->
<id name="id“ column=“ID“ type="long">
<generator class="native"/>
</id>
<!– property mapping--->
<property name=“firstName“ column=“FIRST_NAME“ type="string"/>
<property name=“lastName“ column=“LAST_NAME“ type="string"/>
</class>
</hibernate-mapping>
10 Hibernate Basic May 2012
12. Write Hibernate configuration information
The following are illustrative (not exhaustive) configuration parameters sorted by their
categories. With category description we can guess on what kind of values could be
assigned to individual parameters.
Hibernate JDBC Properties (useful for standalone)
– hibernate.connection.driver_class
– hibernate.connection.url
– hibernate.connection.username
– hibernate.connection.password
Hibernate Datasource Properties (useful inside container)
– hibernate.connection.datasource
– hibernate.jndi.url
List of managed entities
Hibernate Configuration Properties:
– hibernate.dialect n hibernate.order_updates
12 Hibernate Basic May 2012
13. Create Hibernate runtime
Before creating hibernate runtime, lets understand It
Hibernate Session, Transaction, and all Objects working behind them are
collectively called as Hibernate Runtime.
Information like how to connect to database, how to map entity data to table
row, how to handle transactions and many more are provided to Hibernate
Runtime by means of configuration.
As Hibernate is designed to operate in many different environments. Hence,
there are:
– Many configurable parameters of various category.
– Many ways to configure Hibernate Runtime.
13 Hibernate Basic May 2012
14. Create hibernate runtime
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {// Create the SessionFactory from hibernate.cfg.xml
sessionFactory = new Configuration().configure()
.buildSessionFactory();
} catch (Throwable ex) {
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
14 Hibernate Basic May 2012
15. Use Hibernate Runtime
public class EemployeetManager {
private void createAndStoreEmployee(String firstNm, String lastNm) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Employee theEmp = new Employee();
theEmp.setFirstName(firstNm);
theEmp.setLastName(lastNm);
session.save(theEmployee);
session.getTransaction().commit();
}
@SuppressWarnings("unchecked")
private List<Employee> listEmployee() {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
List<Employee> result = session.createQuery("from Eemployee").list();
session.getTransaction().commit();
return result;
}
}
15 Hibernate Basic May 2012
16. Example artifacts in Hibernate Architecture
EmployeeManager.java Application HibernateUtil.java
Persistent Objects
Employee.java
Configuration Hibernate Mapping
Hibernate.cfg.xml Employee.hbm.xm
l
Database
jdbc:hsql:file:testdb
16 Hibernate Basic May 2012
18. Questions and Answers
Choose the correct option:
ORM framework is the one which:
a. Abstracts communication with object-oriented
database.
b. Abstracts communication with Relational
database.
c. Acts as database driver.
d. Is a replacement of Java EE Application
Container.
18 Hibernate Basic May 2012
19. Questions and Answers
Choose the correct option:
We can configure JNDI name for session factory to which
Hibernate can automatically bind its _.
a. SessionFactory
b. JMX deployment
c. hibernate.dialect
19 Hibernate Basic May 2012
20. Questions and Answers
Which of the following is incorrect about <property> element?
a. Maps to attributes of the entity class
b. Can be computed dynamically
c. Column attribute is optional
d. Name attribute can only start with a capital letter
20 Hibernate Basic May 2012
21. Questions and Answers
Choose the correct option:
Hibernate dialects are used in configuration to:
a. Connect to database instance.
b. Replace database driver
c. Make Hibernate generate database specific queries.
21 Hibernate Basic May 2012