JavaEE.Next(): Java EE 7,
8, and Beyond
Reza Rahman
Java EE/GlassFish Evangelist
[email protected]
@reza_rahman
♯jdt2014_B2
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 Overview
Agenda
 A Taste of API Changes
 Looking Ahead
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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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Java EE Past, Present, & Future
Java EE 7
Java EE 6
Java EE 5
J2EE 1.4
Web
Services
Mgmt,
Deployment,
Async
Connector
J2EE 1.3
J2EE 1.2
Servlet, JSP,
EJB, JMS,
RMI
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CMP,
Connector
Architecture
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Ease of
Development,
EJB 3, JPA,
JSF, JAXB,
JAX-WS,
StAX, SAAJ
Pruning,
Extensibility
Ease of Dev,
JAX-RS
CDI
Validation
JMS 2,
Batch, TX,
Concurrency,
Interceptor
WebSocket
JSON
JAX-RPC,
CMP/ BMP,
JSR 88
Web Profile
Web Profile
Servlet 3,
EJB 3.1 Lite
JAX-RS 2
Java EE 7
JSF 2.2
Portable
Extension
s
JAX-RS
2.0
EL 3.0
Servlet 3.1
Common
Annotations
1.2
Interceptors 1.2
Managed Beans 1.0
Connector
1.7
New
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EJB 3.2
JPA 2.1
Major
Release
CDI 1.1
JTA 1.2
Updated
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JMS 2.0
Concurrency Utilities
(JSR 236)
Bean Validation 1.1
JSP 2.3
Batch Applications
(JSR 352)
Java API for JSON
(JSR 353)
Java API for WebSocket
(JSR 356)
JMS 2
 API modernization using dependency injection
 Delivery delay, async send, MDB alignment, JMS resource definition
 Fixes, clarifications
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JMS 2
Old API
@Resource(lookup = "java:global/jms/demoConnectionFactory")
ConnectionFactory connectionFactory;
@Resource(lookup = "java:global/jms/demoQueue")
Queue demoQueue;
public void sendMessage(String payload) {
try {
Connection connection = connectionFactory.createConnection();
try {
Session session = connection.createSession(false,
Session.AUTO_ACKNOWLEDGE);
MessageProducer messageProducer =
session.createProducer(demoQueue);
TextMessage textMessage = session.createTextMessage(payload);
messageProducer.send(textMessage);
} finally {
connection.close();
}
} catch (JMSException ex) {
Logger.getLogger(getClass().getName()).log(Level.SEVERE, null, ex);
}
}
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JMS 2
Simplified API
@Inject
private JMSContext context;
@Resource(mappedName = "jms/inboundQueue")
private Queue inboundQueue;
public void sendMessage (String payload) {
context.createProducer().send(inboundQueue, payload);
}
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JMS 2/Java EE 7
JMS Resource Definition
@JMSConnectionFactoryDefinition(
name="java:global/jms/demoConnectionFactory",
interfaceName= "javax.jms.ConnectionFactory",
description="ConnectionFactory to use in demonstration")
@JMSDestinationDefinition(
name = "java:global/jms/demoQueue",
description = "Queue to use in demonstration",
interfaceName = "javax.jms.Queue",
destinationName="demoQueue")
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Java API for WebSocket
 Higher level API for WebSocket
 Both client and server-side (Java SE and Java EE)
 Both declarative and programmatic
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Java API for WebSocket
Connection Life Cycle
@ServerEndpoint(”/chat”)
public class ChatServer {
Set<Session> peers = ...
@OnOpen
public void onOpen(Session peer) {
peers.add(peer);
}
@OnClose
public void onClose(Session peer) {
peers.remove(peer);
}
...
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Java API for WebSocket
WebSocket Communication
...
@OnMessage
public void message(String message, Session client)
throws IOException {
for (Session session : peers) {
if (!session.equals(client)) {
session.getRemote().sendObject(message);
}
}
}
}
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Java API for JSON Processing
 API to parse, generate, transform, query JSON
 Object Model and Streaming API -- similar to DOM and StAX
 Binding JSON to Java objects forthcoming
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Java API for JSON Processing
Writing JSON (Object Model API)
JsonArray value =
Json.createArrayBuilder()
[
{
.add(Json.createObjectBuilder()
.add("type", "home")
"type": "home”,
.add("number", "212 555-1234")
"number": "212 555-1234"
)
},
.add(Json.createObjectBuilder()
{
.add("type", "fax")
"type": "fax”,
.add("number", "646 555-4567")
"number": "646 555-4567"
}
)
]
.build();
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Java API for JSON Processing
Reading JSON (Streaming API)
{
"firstName": "John", "lastName": "Smith", "age": 25,
"phoneNumber": [
{ "type": "home", "number": "212 555-1234" },
{ "type": "fax", "number": "646 555-4567" }
]
}
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Event event = parser.next();
// START_OBJECT
event = parser.next();
// KEY_NAME
event = parser.next();
// VALUE_STRING
String name = parser.getString();
// "John”
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JAX-RS 2
 Client API
 Message Filters & Entity Interceptors
 Asynchronous Processing – Server & Client
 Hypermedia Support
 Content negotiation
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JAX-RS 2
Client API
// Get instance of Client
Client client = ClientBuilder.newClient();
// Get customer name for the shipped products
String name = client.target(“../orders/{orderId}/customer”)
.pathParam(”orderId", ”10”)
.queryParam(”shipped", ”true”)
.request()
.get(String.class);
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JPA 2.1
 Schema generation
 Stored procedures
 Entity Graphs
 Entity converters
 Unsynchronized persistence contexts
 Fixes and enhancements
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JPA 2.1
Schema Generation Properties
 javax.persistence.schema-
generation.[database|scripts].action
– “none”, “create”, “drop-and-create”, “drop”
 javax.persistence.schema-
generation.scripts.[create|drop]-target
 javax.persistence.schema-generation.[create|drop]script-source
 javax.persistence.sql-load-script-source
 javax.persistence.schema-generation.[create|drop]source
– “metadata”, “script”, “metadata-then-script”, “script-then-metadata”
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JPA 2.1
Stored Procedures
@Entity
@NamedStoredProcedureQuery(name="topGiftsStoredProcedure”,
procedureName="Top10Gifts")
public class Product {
StoredProcedreQuery query = EntityManager.createNamedStoredProcedureQuery(
"topGiftsStoredProcedure");
query.registerStoredProcedureParameter(1, String.class,
ParameterMode.INOUT);
query.setParameter(1, "top10");
query.registerStoredProcedureParameter(2, Integer.class, ParameterMode.IN);
query.setParameter(2, 100);
. . .
query.execute();
String response = query.getOutputParameterValue(1);
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JTA 1.2
 Declarative transactions outside EJB
 Transaction scope - @TransactionScoped
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JTA 1.2
@Transactional Annotation
@Inherited
@InterceptorBinding
@Target({TYPE, METHOD}) @Retention(RUNTIME)
public @interface Transactional {
TxType value() default TxType.REQUIRED;
Class[] rollbackOn() default {};
Class[] dontRollbackOn() default {};
}
@Transactional(rollbackOn={SQLException.class},
dontRollbackOn={SQLWarning.class})
public class UserService {...}
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JSF 2.2
 HTML5 Support
 @FlowScoped
 @ViewScoped for CDI
 Managed beans deprecated/CDI alignment
 Stateless views
 Resource library contracts
 File upload component
 View actions
 Fixes and enhancements
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JSF 2.2
Pass-Through HTML 5 Components
<html>
...
<input type=“color” jsf:value=“#{colorBean.color2}” />
<input type=“date” jsf:value=“#{calendarBean.date1}” />
...
</html>
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JSF 2.2
Faces Flow
@Named
@FlowScoped(id="flow-a")
public class FlowABean implements Serializable {
public String getName() {
return "FlowABean";
}
public String getReturnValue() {
return "/return1";
}
@Produces
public Flow getFlow(FlowBuilder builder) {
builder.startNode("router1");
builder.flowReturn("success").fromOutcome("/complete");
builder.flowReturn("errorOccurred").fromOutcome("error");
builder.switchNode("router1")
.navigationCase().condition("#{facesFlowScope.customerId == null}")
.fromOutcome("create-customer")
.defaultOutcome("view-customer");
builder.viewNode("create-customer");
builder.viewNode("maintain-customer-record");
builder.methodCall("upgrade-customer")
.method("#{maintainCustomerBean.upgradeCustomer}").defaultOutcome("view-customer");
builder.initializer("#{maintainCustomerBean.initializeFlow}");
builder.finalizer("#{maintainCustomerBean.cleanUpFlow}");
return builder.getFlow();
}
}
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Batch Applications for the Java Platform
 API for robust batch processing targeted to Java EE, Java SE
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Batch Applications for the Java Platform
Step Example
@Named(“accountReader")
...implements ItemReader... {
public Account readItem() {
// read account using JPA
<step id=”sendStatements”>
<chunk reader=”accountReader”
processor=”accountProcessor”
writer=”emailWriter”
item-count=”10” />
</step>
@Named(“accountProcessor")
...implements ItemProcessor... {
Public Statement processItems(Account account) {
// read Account, return Statement
@Named(“emailWriter")
...implements ItemWriter... {
public void writeItems(List<Statements> statements) {
// use JavaMail to send email
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Bean Validation 1.1
 Method constraints
 Bean Validation artifacts injectable
 Fixes, clarifications and enhancements
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Bean Validation 1.1
Method Level Constraints
public void placeOrder(
@NotNull String productName,
@NotNull @Max(“10”) Integer quantity,
@Customer String customer) {
. . .
}
@Future
public Date getAppointment() {
. . .
}
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Concurrency Utilities for Java EE
 Provides simple, safe API for concurrency in Java EE
 Builds on Java SE concurrency
– java.util.concurrent.ExecutorService
 Relatively low-level API
 Important enabler for Java EE ecosystem
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Concurrency Utilities for Java EE
Managed Task Executor
public class TestServlet extends HTTPServlet {
@Resource(name=“concurrent/MyExecutorService”)
ManagedExecutorService executor;
Future future = executor.submit(new MyTask());
class MyTask implements Runnable {
public void run() {
... // Task logic
}
}
}
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Others
 Servlet 3.1: Non-blocking I/O, upgrade to WebSocket, security…
 CDI 1.1: Global enablement, @AroundConstruct, @Vetoed…
 EL 3.0: Lambda expressions, collections, operators, standalone API…
 EJB 3.2: Truncating CMP/BMP…
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Java EE 8 Community Survey
https://blogs.oracle.com/ldemichiel/entry/results_from_the_java_ee
https://java.net/downloads/javaee-spec/JavaEE8_Community_Survey_Results.pdf
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Java EE 8 Possibilities
 HTTP 2
 JSON-B
 JCache
 CDI 2
 CDI/EJB alignment
 Security
 Action-oriented Web framework/HTML 5 alignment
 Java SE 8 alignment
 Cloud, PaaS, multitenancy/SaaS
 Configuration, deployment, management, monitoring
 Further pruning
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Try it Out!
http://dlc.sun.com.edgesuite.net/glassfish/
4.0.1/promoted/
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Resources
 Java EE Tutorials
– http://docs.oracle.com/javaee/7/tutorial/doc/home.htm
 Digging Deeper
– http://docs.oracle.com/javaee/7/firstcup/doc/home.htm
– https://glassfish.java.net/hol/
– https://java.net/projects/cargotracker/
 Java EE 7 Transparent Expert Groups
– http://javaee-spec.java.net
 Java EE 7 Reference Implementation
– http://glassfish.org
 The Aquarium
– http://blogs.oracle.com/theaquarium
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