JavaEE5NetBeans_SangShin

8/14/2019 JavaEE5NetBeans_SangShin

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Java EE 5 – Did You GetJava EE 5 – Did You Get

Your Tools With That?Your Tools With That?(NetBeans IDE 5.5(NetBeans IDE 5.5

Provides “Out-of-the-Box”Provides “Out-of-the-Box”Java EE 5 Support!)Java EE 5 Support!)

Sang ShinSang [email protected]@sun.com

www.javapassion.comwww.javapassion.comTechnology ArchitectTechnology Architect

Sun MicrosystemsSun Microsystems



NetBeans Day Atlanta 2007

Agenda

• Primary goal Java EE 5

• Web Services 2.0

• EJB 3.0

• New Java Persistence API (JPA)

• JavaServer Faces

• Q/A

Focus of this presentation is NetBeans support of Java EE 5 Features (not the features themselves)!



You can try all the demos You can try all the demos

yourself by doing the hands-yourself by doing the hands-on lab!on lab!

http://www.javapassion.com/handshttp://www.javapassion.com/handsonlabs/3400_javaee5basics.ziponlabs/3400_javaee5basics.zip

•




Java EE 5 Goal

Make it easier to develop Java EEapplications

Especially when first getting started with Java EE




How did we make it easier?

Then

• Deploymentdescriptors

• Required container interfaces

• JNDI Lookups

• Configuration files andcommand line options

• No Supported UIFramework

Now

Java languageannotations

Plain Old JavaObjects (POJOs)

Dependency Injection

More and better defaults

Java Server Faces(JSF)




Java EE 5 Major Features

• Simplified web services support

• Greatly simplified EJB development

• New Java Persistence API (JPA)

• Dependency Injection

• Easy web application development with JavaServer Faces

• And fully compatible with J2EE 1.4


http://slidepdf.com/reader/full/javaee5netbeanssangshin 7/34NetBeans Day Atlanta 2007

Annotations in Java EE 5

• For defining and using web services

• To greatly simplify EJB development

• To map Java classes to databases (O/R mapping)

• To specify external dependencies (Dependencyinjection)

• To map Java classes to XML

• To reduce need for deployment descriptors



Java EE 5

Web Services



J2EE 1.4 Web Service (Old way) <?xml version='1.0' encoding='UTF-8' ?> <webservices xmlns='http://java.sun.com/xml/ns/j2ee' version='1.1'>

<webservice-description> <webservice-description-name> HelloService</webservice-description-name> <wsdl-file> WEB-INF/wsdl/HelloService.wsdl</wsdl-file> <jaxrpc-mapping-file> WEB-INF/HelloService-mapping.xml</jaxrpc-mapping-file> <port-component xmlns:wsdl-port_ns='urn:HelloService/wsdl'> <port-component-name>HelloService</port-component-name> <wsdl-port>wsdl-port_ns:HelloServiceSEIPort</wsdl-port> <service-endpoint-interface> endpoint.HelloServiceSEI</service-endpoint-interface> <service-impl-bean>

<servlet-link>WSServlet_HelloService</servlet-link> </service-impl-bean> </port-component>

</webservice-description> </webservices>

<?xml version='1.0' encoding='UTF-8' ?> <configuration

xmlns='http://java.sun.com/xml/ns/jax-rpc/ri/config'> <service name='HelloService'

targetNamespace='urn:HelloService/wsdl'typeNamespace='urn:HelloService/types'

packageName='endpoint'> <interface name='endpoint.HelloServiceSEI'servantName='endpoint.HelloServiceImpl'>

</interface> </service>

</configuration>

package endpoint;

import java.rmi.*;

public class HelloServiceImpl

implements HelloServiceSEI {

public String sayHello(String param)

throws java.rmi.RemoteException {

return “Hello “ + param;

}}

package endpoint;

import java.rmi.*;

public interface HelloServiceSEI

extends java.rmi.Remote {

public String sayHello(String param)

throws java.rmi.RemoteException;

}

service implementation

service interface

Deployment descriptor



Java EE 5 Web Service (New way)

package endpoint;

import javax.jws.WebService;

@WebService

public class Hello {

public String sayHello(String name) {

return “Hello “ + name;

}

}



DEMO: Java EE 5 Web ServicesDEMO: Java EE 5 Web Services

1. Make a POJO class Web Service with1. Make a POJO class Web Service with““@WebService” Annotation (Code-completion,@WebService” Annotation (Code-completion,Context-sensitive JavaDoc on Annotations)Context-sensitive JavaDoc on Annotations)

2. Deploy the Web service and test it right2. Deploy the Web service and test it right

within the IDEwithin the IDE3. Access WSDL document of the Web Service3. Access WSDL document of the Web Service

4. Create and run Web service client4. Create and run Web service client



EJB 3.0EJB 3.0



EJB 3.0

• Dramatic simplification of all bean types

• Regular Java classes (POJO)> @Stateless, @Stateful, @MessageDriven annotations

> Use standard interface inheritance• Dependency injection

> Instead of using JNDI API to location components andresources, let the container fetch them for you.

• Entity Beans (CMP) replaced with Java Persistence API (JPA)

• Interceptors



Java EE 5 Stateless Session Bean

package endpoint;

import javax.ejb.Stateless;

@Stateless


public String sayHello(String name) {

return “Hello “ + name;

}

}



DEMO #1: EJB 3.0 StatelessDEMO #1: EJB 3.0 StatelessSession BeanSession Bean

1. Build a Stateless Session Bean using1. Build a Stateless Session Bean using““@Stateless” annotation@Stateless” annotation

2. Build Web application client that accesses2. Build Web application client that accessesthe Stateless Session Beanthe Stateless Session Bean

•



DEMO #2: EJB 3.0 InterceptorsDEMO #2: EJB 3.0 Interceptors

1. Build an application that uses Interceptors1. Build an application that uses Interceptors

•



Java Persistence APIJava Persistence API



Java Persistence API (JPA)

• Single persistence API for Java EE & Java SE

• Developed by EJB expert group> Builds on years of experience with existing technologies

and products (TopLink, Hibernate)• Much simpler than EJB 2.x CMP

• At least three implementations (all open source):> Oracle – GlassFish/TopLink Essentials

> JBoss – Hibernate> BEA – Kodo/OpenJPA



Persistence Unit

• Used to configure> Persistence provider

> Supports pluggability of persistence provider

> Data source> Table Generation Setting

> Create, Drop/Create, Nothing

> Vendor specific properties

• The only XML configuration• NetBeans will create this for you



JPA – Persistence Unit



JPA – Object Relational Mapping

• Developer works with objects> Database queries return objects> Object changes persist to the database

• Data transformation is handled by the persistenceprovider (TopLink, Hibernate, etc.)

• Annotations define how to map objects to tables> @Entity marks a regular Java class as an entity.

> Class attributes map to table columns. Can becustomized with @Column.> Manage relationships: @OneToMany, ...



JPA – Entity Classimport javax.persistence.*;

@Entity

public class Person {

@Id private String name;

private int visits;

public Person() { }

public Person(String name) {

this.name = name;

}

public int incrementVisit() {

return visits++;

}

}



JPA – Entity Manager

• EntityManager stores/retrieves data

• Inject EntityManager:> @PersistenceContext private EntityManager em;

• Create an instance of the entity:> Person p = new Person(param);

• Use EntityManager methods to persist data> em.persist(p); em.merge(p); em.delete(p);

• Query using EJB QL or SQL> Person p = em.find(Person.class, param);



JPA – Entity Manager ...

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

@WebService

@Stateless


@PersistenceContext private EntityManager em; public String sayHello(String param) {

Person p = em.find(Person.class, param);

if (p == null) {

p = new Person(param);

em.persist(p);}

p.incrementVisist();

return “Hello “ + param + “: “ +

} }



DEMO 1: Java Persistence APIDEMO 1: Java Persistence API

1. Create Persistence Unit1. Create Persistence Unit

2. Create Entity classes from Database tables2. Create Entity classes from Database tables

3. Use “TopLink” or “Hibernate” as Persistence3. Use “TopLink” or “Hibernate” as PersistenceProvider Provider



DEMO 2: Java Persistence APIDEMO 2: Java Persistence API

1. Use different strategy for Inheritance and1. Use different strategy for Inheritance andsee how database tables are createdsee how database tables are created

- SINGLE_TABLE- SINGLE_TABLE

- JOINED- JOINED



JavaServer Faces 1.2JavaServer Faces 1.2




JavaServer Faces 1.2

• The Java EE Standard Web Application Framework> Managed beans support dependency injection> Easy to use, powerful, extensible Expression Language,

shared with JSP

• Large market of JSF components> Over 200 components from over 20 vendors, such as...> Apache, BusinessObjects, ESRI, Oracle, Sun, etc.>

Including AJAX support• Java BluePrints AJAX Components> http://blueprints.dev.java.net




JavaServer Faces 1.2 in NetBeans

• Code Completion for:> JavaServer Pages (JSP)> JavaServer Faces (JSF), including expression language> Java Standard Tag Libraries (JSTL)> Any tab libraries added by the user

• Integrated documentation

• HTML, JSP and JSF component palette




JavaServer Faces 1.2 in NetBeans

• Generation of JavaServer Faces applications fromentity classes:> Pages – list, detail, edit, create> Managed bean> Navigation rules

• Code is easy to read/change

• Helps to learn the patterns

• Gets you started quickly• Code generation similar to Ruby on Rails...



DEMO: JavaServer FacesDEMO: JavaServer Faces

1. Create JSF pages from Entity Classes -1. Create JSF pages from Entity Classes -

Easily create CRUD (Create, Read, UpdateEasily create CRUD (Create, Read, Updateand Delete) database applicationand Delete) database application

2. Create Managed Beans from Entity Classes2. Create Managed Beans from Entity Classes




Summary

• The developer works less> No synchronization between Java programming

language and XML

• The container works more> Annotation processing, dependency injection

• NetBeans 5.5 knows Java EE 5> Less work to hide the complexity and XML descriptors

> Does more useful things: wizards, hints, code validation,code generation, etc.

• Java EE 5 - Did You Get Your Tools With That?




Questions & Answers



Java EE 5 – Did You GetJava EE 5 – Did You Get

Your Tools With ThatYour Tools With That

Sang ShinSang [email protected]@sun.com

www.javapassion.comwww.javapassion.com

Technology ArchitectTechnology Architect

Sun MicrosystemsSun Microsystems

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