Difference between revisions of "JEE5 Sample"
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== JSF == | == 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 == | == EJB3 == | ||
| + | === Injection === | ||
| + | Injection eines Entitymanagers in einem EJB3: | ||
| + | |||
| + | @PersistenceContext(unitName="WebLearingPlatformEAR-ejbPU") | ||
| + | protected EntityManager em; | ||
== JPA == | == JPA == | ||
| + | |||
| + | === persistence.xml === | ||
| + | <source lang="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> | ||
| + | </source> | ||
| + | |||
=== Bikirektionale One To Many Beziehung === | === Bikirektionale One To Many Beziehung === | ||
| Line 22: | Line 51: | ||
private Question question; | private Question question; | ||
</source> | </source> | ||
| − | |||
== Resourcen == | == Resourcen == | ||
* [[Java Server Faces]] | * [[Java Server Faces]] | ||
* [[Log4J]] | * [[Log4J]] | ||
Latest revision as of 22:41, 16 April 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;
