As novidades do Java EE 7: do HTML5 ao JMS 2.0

Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 132
As novidades do Java EE 7:
do HTML5 ao JMS 2.0
Bruno Borges
Oracle Product Manager
Java Evangelist
Insert Picture Here

Bruno Borges
● Oracle Product Manager / Evangelist
● Desenvolvedor, Gamer
● Entusiasta em Java Embedded e JavaFX
● Twitter: @brunoborges

Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 134Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 16
Agenda  Java EE 7: quais as novidades?
 Construindo aplicações HTML5
– WebSockets 1.0
– JAX-RS 2.0
– JavaServer Faces 2.2
– JSON API 1.0
 Mensageria com JMS 2.0
 Códigos de exemplo de Java EE 7
 O que vem por aí

Java EE 7: quais as novidades?
 Servlet 3.1
 Java API for JSON Processing 1.0
 Bean Validation 1.1
 Batch Applications API 1.0
 Java Persistence API 2.1
 Concurrency Utilities for Java EE 1.0
 E muito mais... :-)

Java EE 7: quais as novidades?
 Web Profile updated to include
– JAX-RS
– WebSocket
– JSON-P
– EJB 3.2 Lite
 Outras APIs

Construindo aplicações HTML5
 WebSocket 1.0
 JAX-RS 2.0
 JavaServer Faces 2.2
 JSON-P API

WebSockets 1.0
 API para definir WebSockets, tanto Client como Server
– Annotation-driven (@ServerEndpoint)
– Interface-driven (Endpoint)
– Client (@ClientEndpoint)
 SPI para data frames
– Negociação handshake na abertura do WebSocket
 Integração com o Java EE Web container

WebSockets 1.0
import javax.websocket.*;
import javax.websocket.server.*;
@ServerEndpoint(“/hello”)
public class HelloBean {
    @OnMessage
    public String sayHello(String name) {
        return “Hello “ + name;
    }
}

WebSockets 1.0
@ServerEndpoint(“/chat”)
public class ChatBean {
    @OnOpen
    public void onOpen(Session peer) {
        peers.add(peer);
    }
    @OnClose
    public void onClose(Session peer) {
        peers.remove(peer);
    }
    @OnMessage
    public void message(String msg, Session client) {
        peers.forEach(p > p.getRemote().sendMessage(msg));
    }
}

DEMO
WebSockets

Maven Archetype para o Java EE 7
 Maven Archetypes para Java EE 7
– http://mojo.codehaus.org
 Maven Archetype com o Embedded GlassFish configurado
– http://github.com/brunoborges/javaee7-archetype
 Só precisa...
– $ mvn package embedded-glassfish:run

DEMO
Maven Archetype
Java EE 7
GlassFish Embedded

JAX-RS 2.0
 Client API
 Message Filters & Entity Interceptors
 Asynchronous Processing – Server & Client
 Suporte Hypermedia
 Common Configuration
– Compartilhar configuração comum entre diversos serviços
REST

JAX-RS 2.0 - Client
// Get instance of Client
Client client = ClientFactory.getClient();
// Get customer name for the shipped products
String name = client.target(“http://.../orders/{orderId}/customer”)
                    .resolveTemplate(“orderId”, “10”)
                    .queryParam(“shipped”, “true)”
                    .request()
                    .get(String.class);

JAX-RS 2.0 - Server
@Path("/async/longRunning")
public class MyResource {
@GET
public void longRunningOp(@Suspended AsyncResponse ar) {
ar.setTimeoutHandler(new MyTimoutHandler());
ar.setTimeout(15, SECONDS);
Executors.newSingleThreadExecutor().submit(new Runnable() {
public void run() {
...
ar.resume(result);
}});
}
}

JavaServer Faces 2.0
 Flow Faces
 HTML5 Friendly Markup
 Cross-site Request Forgery Protection
 Loading Facelets via ResourceHandler
 Componente de File Upload
 Multi-templating

JSON API 1.0
 JsonParser
– Processa JSON em modo “streaming”
– Similar ao XMLStreamReader do StaX
 Como criar
– Json.createParser(...)
– Json.createParserFactory().createParser(...)
 Eventos do processador
– START_ARRAY, END_ARRAY, START_OBJECT, END_OBJECT, ...

JSON API 1.0
"phoneNumber": [
{
"type": "home",
"number": ”408-123-4567”
},
{
"type": ”work",
"number": ”408-987-6543”
}
]
JsonGenerator jg = Json.createGenerator(..
jg.
.beginArray("phoneNumber")
.beginObject()
.add("type", "home")
.add("number", "408-123-4567")
.endObject()
.beginObject()
.add("type", ”work")
.add("number", "408-987-6543")
.endObject()
.endArray();
jg.close();

JMS para Mensageria

Java Message Service API 2.0
 Simplificação da JMS API 1.1 sem quebrar compatibilidade
 Nova API requer menos objetos
– JMSContext, JMSProducer...
 No Java EE, permite que JMSContext seja injetado e gerenciado
pelo container, usando CDI
 Objetos JMS implementam AutoCloseable
 Envio Async de mensagens

 JMSContext
 Encapsula Connection e Session
 Criado a partir de um default ConnectionFactory
– Permite especificar um ConnectionFactory também
 Unchecked exceptions
 Suporta encadeamento de métodos, para fluid style

@Resource(lookupName =
“java:comp/defaultJMSConnectionFactory”)
ConnectionFactory myJMScf;
@Resource(lookupName = “jms/inboud”)
private Queue inboundQueue;
@Inject
@JMSConnectionFactory(“jms/myCF”)
private JMSContext context;

@JMSConnectionFactoryDefinition(
name=”java:global/jms/demoCF”
className = “javax.jms.ConnectionFactory”)
@JMSDestinationDefinition(
name = “java:global/jms/inboudQueue”
className = “javax.jms.Queue”
destinationName = “inboundQueue”)

Message Driven Beans para JMS 2.0
@MessageDriven(
mappedName = “jms/myQueue”,
activationConfig = {
@ActivationConfigProperty(
propertyName = “destinationLookup”,
propertyValue = “jms/myQueue”),
@ActivationConfigProperty(
propertyName = “connectionFactoryLookup”,
propertyValue = “jms/myCF”)
})

Outros exemplos

Bean Validation 1.1
public void placeOrder(
@NotNull String productName,
@NotNull @Max(“10”) Integer quantity,
@Customer String customer) {
//. . .
}
@Future
public Date getAppointment() {
//. . .
}

Batch API 1.0
<job id=“myJob”>
<step id=“init”>
<chunk reader=“R” writer=W” processor=“P” />
<next on=“initialized” to=“process”/>
<fail on=“initError”/>
</step>
<step id=“process”>
<batchlet ref=“ProcessAndEmail”/>
<end on=”success”/>
<fail on=”*” exit-status=“FAILURE”/>
</step>
</job>

GlassFish 4.0, NetBeans, e Java EE 7
 Java EE 7 Expert Group Project
– http://javaee-spec.java.net
 GlassFish 4.0 - Java EE 7 Reference Implementation
– http://www.glassfish.org
 Adopt a JSR
– http://glassfish.org/adoptajsr
 NetBeans e Java EE 7
– http://wiki.netbeans.org/JavaEE7

GlassFish 4.0, NetBeans, e Java EE 7
 JUGs participando ativamente
 Promovendo as JSRs
– Para a comunidade Java
– Revendo specs
– Testando betas e códigos de exemplo
– Examplos, docs, bugs
– Blogging, palestrando, reuniões de JUG

OBRIGADO!

The preceding is intended to outline our general product direction. It is intended
for information purposes only, and may not be incorporated into any contract.
It is not a commitment to deliver any material, code, or functionality, and should
not be relied upon in making purchasing decisions. The development, release,
and timing of any features or functionality described for Oracle’s products
remains at the sole discretion of Oracle.

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