What's new in Java EE 7

What's new in Java EE 7?

Expertenkreis Java

19.09.2013, GEDOPLAN

Dirk Weil, GEDOPLAN GmbH

JavaServer Faces 2.2

Big Ticket Features

Faces Flows

Resource Library Contracts

HTML 5 Friendly Markup

Stateless Views

Other Changes

UIData supports Collection

@ViewScoped

javax.faces.bean deprecated in next version

What's new in Java EE 7? 2

JSF 2.2: Faces Flows

Combination of various views

Internal navigation

Dedicated entry and return views

"Subroutine"

Embeddable

Flow scoped values

and beans


JSF 2.2: Faces Flows

Various flow definitions

Simple, directory-based

Flow descriptor

CDI Producer

Location

Web app root

Library JAR

META-INF/flows


JSF 2.2: Resource Library Contracts

Encapsulation of templates, images, CSS and JS files

Subdir of

WebappRoot/contracts

Library JAR META-INF/contracts

Activation in faces-config.xml or view attributes

5 What's new in Java EE 7?

<resource-library-contracts> <contract-mapping> <url-pattern>*</url-pattern> <contracts>siteLayout</contracts> </contract-mapping> </resource-library-contracts>

siteLayout/ topNav_template.xhtml leftNav_foo.xhtml styles.css script.js background.png

Java Persistence API 2.1

Converter

JPQL & Criteria Query Enhancements

CDI Injection in Entity Listener

DDL Handling

Entity Graphs


JPA 2.1: Converter


@Converter public class YesNoConverter implements AttributeConverter<Boolean, String> { public String convertToDatabaseColumn(Boolean fieldValue) { if (fieldValue == null) return null; return fieldValue ? "Y" : "N"; } public Boolean convertToEntityAttribute(String columnValue) { if (columnValue == null) return null; return columnValue.equals("Y");

@Entity public class Country { @Convert(converter = YesNoConverter.class) private boolean expired;

JPA 2.1: JPQL & Criteria Query Enhancements

ON: Join filter

TREAT: Downcast (includes filter)

FUNCTION: Call DB function


select p.name, count(b) from Publisher p left join p.books b on b.bookType = BookType.PAPERBACK group by p.name

select s from StorageLocation s where treat(s.product as Book).bookType = BookType.HARDCOVER

select c from Customer c where function('hasGoodCredit', c.balance, c.creditLimit)

JPA 2.1: JPQL & Criteria Query Enhancements

Bulk Update/Delete for Criteria Query

Stored Procedure Queries


CriteriaUpdate<Product> criteriaUpdate = criteriaBuilder.createCriteriaUpdate(Product.class); Root<Product> p = criteriaUpdate.from(Product.class); Path<Number> price = p.get(Product_.price); criteriaUpdate.set(price, criteriaBuilder.prod(price, 1.03)); entityManager.createQuery(criteriaUpdate).executeUpdate();

StoredProcedureQuery query = entityManager.createStoredProcedureQuery("findMissingProducts");

JPA 2.1: CDI Injection in Entity Listener


public class CountryListener { @Inject private AuditService auditService; @PreUpdate public void preUpdate(Object entity) { this.auditService.logUpdate(entity); }

@Entity @EntityListeners(CountryListener.class) public class Country {

JPA 2.1: DDL Handling

Create and/or drop db tables

Based on entity meta data (mapping)

SQL script

Data load script


<persistence … > <persistence-unit name="test"> … <properties> <property name="javax.persistence.schema-generation.database.action" value="drop-and-create" /> <property name="javax.persistence.schema-generation.create-script-source" value="META-INF/create.sql" /> <property name="javax.persistence.schema-generation.create-source" value="metadata-then-script" /> <property name="javax.persistence.sql-load-script-source" value="META-INF/sqlLoad.sql" />

JPA 2.1: DDL Handling

Write create and/or drop scripts


Writer createWriter = …; // File, String … Map<String, Object> properties = new HashMap<>(); properties.put("javax.persistence.schema-generation.scripts.action", "create"); properties.put("javax.persistence.schema-generation.scripts.create-target", createWriter); Persistence.generateSchema("test", properties);

JPA 2.1: Entity Graphs

Declaration of lazy attributes to be loaded by find or query

find parameter or query hint

fetchgraph: Fetch entity graph attributes only

loadgraph: Fetch eager attributes also


@Entity

@NamedEntityGraph(name = "Publisher_books",

attributeNodes = @NamedAttributeNode(value = "books")))

public class Publisher

{

…

@OneToMany(mappedBy = "publisher", fetch = FetchType.LAZY)

private List<Book> books;

TypedQuery<Publisher> query = entityManager.createQuery(…);

query.setHint("javax.persistence.fetchgraph", "Publisher_books");

CDI 1.1

Enhanced bean discovery

Global enablement of interceptors, decorators, alternatives

Constructor interception

@TransactionScoped

@Transactional

Bean Validation for method parameters and return values


CDI 1.1: Bean Discovery

Discovery mode: all, annotated, none

Exclusion filter: Class or package


<beans … bean-discovery-mode="all" version="1.1"> <scan> <exclude name="de.gedoplan.….sub1.beans.DiscoverableBean12"/> <exclude name="de.gedoplan.….sub1.beans.excluded.**"/> <exclude name="de.gedoplan.….dummy.**"> <if-system-property name="NO_DUMMY" value="true" /> </exclude> </scan> </beans>

CDI 1.1: Global Enablement of Interceptors etc.

@Priority

Global enablement and ordering of interceptors & decorators

Global activation of alternative with highest priority


@One @Interceptor @Priority(Interceptor.Priority.APPLICATION + 1) public class OneInterceptor {

CDI 1.1: Constructor Interception


@Interceptor public class TraceCallInterceptor { @AroundConstruct public Object traceConstructorCall(InvocationContext ic) throws Exception { … } @AroundInvoke public Object traceMethodCall(InvocationContext ic) throws Exception { … }

CDI 1.1: @Transactional & @TransactionScoped

Platform global transaction interceptor @Transactional

TX modes like EJB TX attributes

CDI scope @TransactionScoped


@Transactional(value = TxType.REQUIRED, dontRollbackOn={HarmlessException.class}) public void insert(Cocktail cocktail) {

CDI 1.1: Bean Validation for Parameters and Return Values


@NotNull public List<Fragebogen> createUmfrage(@Min(10) int personenZahl) {

More new things

Websockets

JAX-RS

JSON

Standardized Client

Concurrency Utilities

Batch

JMS


Platforms

GlassFish 4

Reference implementation

Stable version: 4.0

Promoted build: 4.0.1 b03

WildFly 8

Formerly known as JBoss AS

Current version: 8.0.0.Alpha4


Schön, dass Sie da waren!

Unserer nächster Termin:

21.11.2013: Testen im EE-Umfeld – Seien Sie feige!

[email protected]

What's new in Java EE 7

Technology

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