Main Idea Lesson 1: Vibration and Sound (Science
72
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Documents
Le téléchargement nécessite un accès à la bibliothèque YouScribe Tout savoir sur nos offres
- leçon - matière potentielle : box a.
- cours - matière potentielle : vocabulary
- leçon - matière potentielle : difficulty
- cours - matière potentielle : 2 f - 1 s
- leçon - matière potentielle : boxes
- guided reading boxes
- vibrate discover sound
- electric violin
- vibrations
- sound waves
- sound
- main idea
- scientific investigations
- class
Hibernate Basics
1Topics
• Why use Object/Relational Mapping(ORM)?
• What is and Why Hibernate?
• Hibernate architecture
• Instance states
• Persistence lifecycle operations
• DAOs
• Transaction
• Configuration
• SessionFactory
• Persistent class
2Topics covered in other
presentations
• Hibernate Step by Step
• Hibernate Criteria API
• Hibernate HQL
• Hibernate Mapping
3Why Use ORM?
4Why Object/Relational Mapping?
• A major part of any enterprise application
development project is the persistence layer
– Accessing and manipulate persistent data typically
with relational database
• ORM handles Object-relational impedance
mismatch
– Data lives in the relational database, which is table
driven (with rows and columns)
● Relational database is designed for fast query operation of
table-driven data
– We want to work with objects, not rows and columns
of table
5What is & Why
Hibernate?
6What is Hibernate?
● Object/relational mapping framework for
enabling transparent POJO persistence
– Let you work without being constrained by table-
driven relational database model
● Build persistent objects following common
OO programing concepts
– Association
– Inheritance
– Polymorphism
– Composition
– Collection API for “many” relationship
7Why use Hibernate?
● Allows developers focus on domain object
modelling not the persistence plumbing
● Performance
– High performance object caching
– Configurable materialization strategies
● Sophisticated query facilities
– Criteria API and Query by Criteria
– Query By Example (QBE)
– Hibernate Query Language (HQL)
– Native SQL
8Hibernate
Architecture
9Hibernate Architecture
10
