OVERVIEW
Best Practice JPA 2.1 - API JPA - persistence config General
SHEET 1: BEST PRACTICE
Better have separate project for JPA with its test case. So this project can be used by many application those want to use the same database.
Dont have DAO classes inside of JPA project. Since service layer may be with or without spring
And also, deverloper may add any logic / log / etc. in his DAO class .
ID use wrapper instead primitive type, to allow null for unsaved objects
Field try to avoid use of Public field
SHEET 2: JPA 2.1 - API
Persistence class used only in Java SE Persistence
EntityManagerFactory EntityManager
EntityTransaction also used only in Java SE EntityTransaction
when result type unknown or dynamic queries Query
when result type known TypedQuery ( used for Static/named query )
CriteriaBuilder
CriteriaQuery ( used for Dynamic Query )
PersistenceProvider org.hibernate.ejb.HibernatePersistence
SHEET 3: JPA - PERSISTENCE CONFIG
javax.persistence.jdbc.driver
javax.persistence.jdbc.url
javax.persistence.jdbc.user
javax.persistence.jdbc.password
SHEET 4: GENERAL
Toplink from oracle first developed for SmallTalk language, now suppot java Toplink is commercial product Hibernate is open source JDBC released in 97 in JDK 1.1 EJB Entity bean was added in J2EE JDO is next attempt after few failure of EJB entity bean, it enhance the byte code JPA, introduced by combination of vendors, taken few feature from JDO JPA 1.0 released in 2006 JPA 2.0 released in 2009