Difference between revisions of "JEE5 Sample"
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== JPA == | == JPA == | ||
+ | |||
+ | === persistence.xml === | ||
+ | <?xml version="1.0" encoding="UTF-8"?> | ||
+ | <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> | ||
+ | <persistence-unit name="WebLearingPlatformEAR-ejbPU" transaction-type="JTA"> | ||
+ | <provider>oracle.toplink.essentials.PersistenceProvider</provider> | ||
+ | <jta-data-source>jdbc/sample</jta-data-source> | ||
+ | <exclude-unlisted-classes>false</exclude-unlisted-classes> | ||
+ | <properties> | ||
+ | <property name="toplink.ddl-generation" value="create-tables"/> | ||
+ | </properties> | ||
+ | </persistence-unit> | ||
+ | </persistence> | ||
+ | |||
=== Bikirektionale One To Many Beziehung === | === Bikirektionale One To Many Beziehung === | ||
Line 35: | Line 49: | ||
private Question question; | private Question question; | ||
</source> | </source> | ||
− | |||
== Resourcen == | == Resourcen == | ||
* [[Java Server Faces]] | * [[Java Server Faces]] | ||
* [[Log4J]] | * [[Log4J]] |
Revision as of 15:59, 23 January 2009
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Contents
JSF
EJB Injection
Injection eines EJBs im WebLayer. name ist der JNDI-Name:
@EJB(name="QuestionBCBean") QuestionBCLocal bc;
Definition des Beans:
@Stateless(name="QuestionBCBean") public class QuestionBCBean implements QuestionBCLocal {
EJB3
Injection
Injection eines Entitymanagers in einem EJB3:
@PersistenceContext(unitName="WebLearingPlatformEAR-ejbPU") protected EntityManager em;
JPA
persistence.xml
<?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> <persistence-unit name="WebLearingPlatformEAR-ejbPU" transaction-type="JTA"> <provider>oracle.toplink.essentials.PersistenceProvider</provider> <jta-data-source>jdbc/sample</jta-data-source> <exclude-unlisted-classes>false</exclude-unlisted-classes> <properties> <property name="toplink.ddl-generation" value="create-tables"/> </properties> </persistence-unit> </persistence>
Bikirektionale One To Many Beziehung
In der Klasse Question.java
@OneToMany(mappedBy="question", cascade = {CascadeType.PERSIST, CascadeType.MERGE} )
private List<QuestionOption> options = new ArrayList<QuestionOption>();
In der Klasse QuestionOption.java
@ManyToOne(optional=false, fetch = FetchType.EAGER)
@JoinColumn(name="questionid", nullable=false)
private Question question;