Java EE 6 - Deep Dive - Indic Threads, Pune - 2010

Jagadish Ramu
Sun Microsystems
Java EE 6 - Deep Dive

1

The following/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.

2

Compatible Java EE 6 Impls

Today:

Announced:
3

Goals for the Java EE 6
Platform
 Flexible & Light-weight
 Web Profile 1.0
 Pruning: JAX-RPC, EJB 2.x Entity Beans, JAXR, JSR 88
 Extensible
• Embrace Open Source Frameworks

 Easier to use, develop on
• Continue on path set by Java EE 5

4

Java EE 6 Web Profile 1.0
 Fully functional mid-sized profile
• Actively discussed in the Java EE 6 Expert
Group and outside it
• Technologies
• Servlets 3.0, JSP 2.2, EL 2.2, Debugging Support for Other
Languages 1.0, JSTL 1.2, JSF 2.0, Common Annotations
1.1, EJB 3.1 Lite, JTA 1.1, JPA 2.0, Bean Validation 1.0,
Managed Beans 1.0, Interceptors 1.1, Context &
Dependency Injection 1.0, Dependency Injection for
Java 1.0

5

Java EE 6 - Done

09
 Specifications approved by the JCP
 Reference Implementation is GlassFish v3

20
 TCK
ec
D

6

Java EE 6 Specifications
 The Platform
 Java EE 6 Web Profile 1.0
 Managed Beans 1.0

7

New

 Contexts and Dependency Injection for
Java EE (JSR 299)
 Bean Validation 1.0 (JSR 303)
 Java API for RESTful Web Services (JSR 311)
 Dependency Injection for Java (JSR 330)

8

Extreme Makeover

 Java Server Faces 2.0 (JSR 314)
 Java Servlets 3.0 (JSR 315)
 Java Persistence 2.0 (JSR 317)
 Enterprise Java Beans 3.1 & Interceptors 1.1
(JSR 318)
 Java EE Connector Architecture 1.6 (JSR 322)

9

Updates
 Java API for XML-based Web Services 2.2 (JSR 224)
 Java API for XML Binding 2.2 (JSR 222)
 Web Services Metadata MR3 (JSR 181)
 JSP 2.2/EL 2.2 (JSR 245)
 Web Services for Java EE 1.3 (JSR 109)
 Common Annotations 1.1 (JSR 250)
 Java Authorization Contract for Containers 1.3 (JSR 115)
 Java Authentication Service Provider Interface for
Containers 1.0 (JSR 196)
10

Servlets in Java EE 5
At least 2 files

package com.sun;
<web-app> public class MyServlet extends
<servlet> HttpServlet {
<servlet-name>MyServlet public void
doGet(HttpServletRequest
</servlet-name>
req,HttpServletResponse res)
<servlet-class>
com.sun.MyServlet {
</servlet-class> ...
</servlet>
<servlet-mapping> }
<servlet-name>MyServlet
</servlet-name> ...
<url-pattern>/myApp/*
</url-pattern> }
</servlet-mapping>
...
</web-app>
11

Servlets 3.0 (JSR 315)
Annotations-based @WebServlet

package com.sun;
@WebServlet(name=”MyServlet”, urlPatterns={”/myApp/*”})
public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest req,
HttpServletResponse res)

{
... <web-app>
<servlet>
} <servlet-name>MyServlet</servlet-name>

<servlet-class>
com.sun.MyServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/myApp/*</url-pattern>
</servlet-mapping>
...
</web-app>

http://blogs.sun.com/arungupta/entry/totd_81_getting_started_with
12

Servlets 3.0
Annotations-based @WebServlet

@WebServlet(name="mytest",
urlPatterns={"/myurl"},
initParams={
@WebInitParam(name="n1",
value="v1"),
@WebInitParam(name="n2", value="v2")

}
)
public class TestServlet extends
javax.servlet.http.HttpServlet {
.... 13

}

Servlets 3.0
Annotations-based @WebListeners
<listener>
<listener-class>
server.LoginServletListener
</listener-class>
</listener>

package server;

. . .

@WebListener()
public class LoginServletListener implements
ServletContextListener {

14

Servlets 3.0
Annotations-based @WebFilter
<filter>
<filter-name>PaymentFilter</filter-name>
<filter-class>server.PaymentFilter</filter-class>
<init-param>
<param-name>param1</param-name>
<param-value>value1</param-value>
package server; </init-param>
. . . </filter>
@WebFilter( <filter-mapping>
filterName="PaymentFilter", <url-pattern>/*</url-pattern>
InitParams={ </filter-mapping>
@WebInitParam( <filter-mapping>
name="param1", <servlet-name>PaymentServlet</servlet-name>
value="value1") <dispatcher>REQUEST</dispatcher>
} </filter-mapping>
urlPatterns={"/*"},
servletNames={"PaymentServlet"},
dispatcherTypes={DispatcherType.REQUEST}
)
public class PaymentFilter implements Filter {
. . .

15

Servlets 3.0
Asynchronous Servlets

 Useful for Comet, long waits
 Must declare
@WebServlet(asyncSupported=true)
AsyncContext context = request.startAsync();
context.addListener(new AsyncListener() { … });
context.dispatch(“/request.jsp”);
//context.start(Runnable action);
...
context.complete(); //marks completion
16
http://blogs.sun.com/arungupta/entry/totd_139_asynchronous_request_processing

Servlets 3.0
Extensibility

 Plugin libraries using web fragments
 Modular web.xml
 Bundled in framework JAR file in META-INF
directory
 Zero-configuration, drag-and-drop for web
frameworks
• Servlets, servlet filters, context listeners for a
framework get discovered and registered by the
container
 Only JAR files in WEB-INF/lib are used 17

Servlets 3.0
Extensibility

<web-fragment>
<filter>
<filter-name>wicket.helloworld</filter-name>
<filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class>
<init-param>
<param-name>applicationClassName</param-name>
<param-value>...</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>wicket.helloworld</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-fragment>
http://blogs.sun.com/arungupta/entry/totd_91_applying_java_ee

18

Servlets 3.0 Resource Sharing

 Static and JSP no longer confined to
document root of the web application
 May be placed in WEB-INF/lib/
[*.jar]/META-INF/resources
 Resources in document root take
precedence over those in bundled JAR
myapp.war
WEB-INF/lib/catalog.jar
/META-INF/resources/catalog/books.html

http://localhost:8080/myapp/catalog/books.html
19

EJB 3.1 (JSR 318)
Package & Deploy in a WAR
Java EE 5 Java EE 6
foo.war
foo.ear
WEB-INF/classes
foo_web.war com.sun.FooServlet
com.sun.TickTock
WEB-INF/web.xml com.sun.FooBean
WEB-INF/classes com.sun.FooHelper
com.sun.FooServlet
com.sun.TickTock

foo_ejb.jar
com.sun.FooBean web.xml ?
com.sun.FooHelper

http://blogs.sun.com/arungupta/entry/totd_95_ejb_3_1
20

EJB 3.1

@Stateless
public class App {
public String sayHello(String name) {
return "Hello " + name;
}
}

21

EJB 3.1
 No interface view – one source file per bean
 Only for Local and within WAR
 Required for Remote
 No location transparency
 Component initialization in @PostConstruct
 No assumptions on no-arg ctor

22

Java EE 6 Namespaces
 Global
 java:global/..(for all applications)
 Application scoped
 java:app/.. (visibile only for the app.)
 App-1 binds an Object by name
“java:app/myObject”, App-2 cannot
see it.
 All modules of the app has visibility.
 mod-1, mod-2 of app-1 can see “java:app/myObject”
23

Java EE 6 Namespaces
 Module Scoped
 java:module/.. (visible only for the
module)
 App-1 has module-1 and module-2

Module-1's namespace not accessible by module-2
 All components of the module has
visibility
 Component
24

EJB 3.1
Portable Global JNDI Name Syntax
 Portable
 Global
 Application/Module-scoped
 Derived from metadata such as name,
component name etc.

25

EJB 3.1
Base name of ejb-jar/WAR
Only within EAR (or ejb-jar.xml/web.xml)
Base name of EAR
(or application.xml)

java:global[/<app-name>]/<module-name>/<bean-name>
[!<fully-qualified-interface-name>]

Unqualified name of the bean class
Annotation/name attribute
• Until now, only java:comp Or ejb-jar.xml
• Local & Remote business
• No-interface
• Also in java:app, java:module
26

EJB 3.1

package com.acme;
@Stateless
public class FooBean implements Foo { ... }
 FooBean is packaged in fooejb.jar
java:global/fooejb/FooBean
java:global/fooejb/FooBean!com.acme.Foo
java:app/fooejb/FooBean
java:app/fooejb/FooBean!com.acme.Foo
java:module/FooBean
java:module/FooBean!com.acme.Foo
27

EJB 3.1
Embeddable API – Deploy the Bean

public void testEJB() throws NamingException {
EJBContainer ejbC =
EJBContainer.createEJBContainer();
Context ctx = ejbC.getContext();
App app = (App)
ctx.lookup("java:global/classes/App");
assertNotNull(app);
String NAME = "Duke";
String greeting = app.sayHello(NAME);
assertNotNull(greeting);
assertTrue(greeting.equals("Hello " + NAME));
ejbC.close();
}

http://blogs.sun.com/arungupta/entry/totd_128_ejbcontainer_createejbcontainer_embedded

28

Screencast
JSP, Servlets, EJB

29

EJB 3.1
Singleton Beans
 One instance per app/VM, not pooled
 Useful for caching state
 CMT/BMT
 Access to container services for injection, resource
manager, timers, startup/shutdown callbacks, etc.
 Enable eager initialization using @Startup
 Always supports concurrent access
 Define initialization ordering using @DependsOn
@Singleton
public class MyEJB {
. . .
30
}

EJB 3.1
Asynchronous Session Beans
 Control returns to the client before the
container dispatches invocation to a
bean instance
 @Asynchronous – method or class
 Return type – void or Future<V>
 Transaction context does not propagate
 REQUIRED → REQUIRED_NEW
 Security principal propagates
31

EJB 3.1
Asynchronous Session Beans – Code Sample
@Stateless
@Asynchronous
public class SimpleAsyncEJB {
public Future<Integer> addNumbers(int n1, int n2) {
Integer result;

result = n1 + n2;
try {
// simulate JPA queries + reading file system
Thread.currentThread().sleep(2000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}

return new AsyncResult(result);
}
}

http://blogs.sun.com/arungupta/entry/totd_137_asynchronous_ejb_a
32

EJB 3.1
Timers
 Automatically created EJB Timers
 Calendar-based Timers – cron like semantics
 Every Mon & Wed midnight
@Schedule(dayOfWeek=”Mon,Wed”)
 2pm on Last Thur of Nov of every year
(hour=”14”, dayOfMonth=”Last Thu”,
month=”Nov”)
 Every 5 minutes of every hour
(minute=”*/5”, hour=”*”)
 Every 10 seconds starting at 30
(second=”30/10”)
 Every 14th minute within the hour, for the hours 1 & 2 am
(minute=”*/14”, hour=”1,2”)
33

EJB 3.1
Timers
 Single persistent timer across JVMs
 Automatically created EJB Timers
 @Schedule(hour=”15”,dayOfWeek=”Fri”)

 Can be chained
 @Schedules({
@Schedule(hour=”6”,dayOfWeek=”Tue,Thu,Fri-Sun”),
@Schedule(hour=”12”,dayOfWeek=”Mon,Wed”)
})

 May be associated with a TimeZone
 Non-persistent timer, e.g. Cache
 @Schedule(..., persistent=false) 34

EJB 3.1
EJB 3.1 Lite – Feature Comparison

35

Managed Beans 1.0

EJB CDI JSF JAX-WS JAX-RS JPA ...

@Stateful
@Managed @Web
@Stateless @Named @Path @Entity ...
Bean Service
@Singleton

@javax.annotation.ManagedBean

36

Managed Beans 1.0
 POJO as managed component for the Java
EE container
 JavaBeans component model for Java EE
 Simple and Universally useful
 Advanced concepts in companion specs
 Basic Services
 Resource Injection, Lifecycle Callbacks, Interceptors
 Available as
 @Resource / @Inject
 java:app/<module-name>/<bean-name>
 java:module/<bean-name> 37

Managed Beans 1.0 - Sample
@javax.annotation.ManagedBean @Resource
public class MyManagedBean { MyManagedBean bean;
@PostConstruct
public void setupResources() {
// setup your resources
} @Inject
MyManagedBean bean;
@PreDestroy
public void cleanupResources() {
// collect them back here
}

return "Hello " + name;
}
}
http://blogs.sun.com/arungupta/entry/totd_129_managed_beans_1
38

Java Persistence API 2 (JSR
317)
Sophisticated mapping/modeling options
 Collection of basic types

@Entity
public class Person {
@Id protected String ssn;
protected String name;
protected Date birthDate;
. . .
@ElementCollection
@CollectionTable(name=”ALIAS”)
protected Set<String> nickNames;
}
39

Java Persistence API 2

 Collection of embeddables

@Embeddable public class Address {
String street;
String city;
String state;
. . .
}

@Entity public class RichPerson extends Person {
. . .
@ElementCollection
protected Set<Address> vacationHomes;
. . .
} 40


 Multiple levels of embedding

@Embeddable public class ContactInfo {
@Embedded Address address;
. . .
}

@Entity public class Employee {
@Id int empId;
String name;
@Embedded
ContactInfo contactInfo;
. . . 41
}


 Improved Map support

@Entity public class VideoStore {
@Id Integer storeId;
Address location;
. . .
@ElementCollection
Map<Movie, Integer> inventory;
}

@Entity public class Movie {
@Id String title;
@String director;
. . .
}
42

Metamodel

 Abstract “schema-level” model over
managed classes of a Persistence Context
 Entities, Mapped classes, Embeddables, ...
 Accessed dynamically
 EntityManager or
EntityManagerFactory.getMetamodel()
 And/or statically materialized as
metamodel classes
 Use annotation processor with javac
43

Metamodel Example
@Entity
public class Customer {
@Id Integer custId;
String name;
...
Address address;
@ManyToOne SalesRep rep;
@OneToMany Set<Order> orders;
}
import javax.persistence.metamodel.*;

@StaticMetamodel(Customer.class)
public class Customer_ {
public static SingularAttribute<Customer, Integer> custId;
public static SingularAttribute<Customer, String> name;
public static SingularAttribute<Customer, Address> address;
public static SingularAttribute<Customer, SalesRep> rep;
public static SetAttribute<Customer, Order> orders;
}
44

Caching

 1st-level Cache by PersistenceContext
 Only one object instance for any database row
 2nd-level by “shared-cache-mode”
 ALL, NONE
 UNSPECIFIED – Provider specific defaults
 ENABE_SELECTIVE - Only entities with Cacheable(true)
 DISABLE_SELECTIVE - All but with Cacheable(false)
 Optional feature for PersistenceProvider

45

Much more ...

 New locking modes
 PESSIMISTIC_READ – grab shared lock
 PESSIMISTIC_WRITE – grab exclusive lock
 PESSIMISTIC_FORCE_INCREMENT – update version
 em.find(<entity>.class, id,
LockModeType.XXX)
 em.lock(<entity>, LockModeType.XXX)
 Standard configuration options
 javax.persistence.jdbc.[driver | url | user | password]
46

Screencast - JPA

47

@DataSourceDefinition
@DataSourceDefinition(
name="java:global/MyApp/MyDataSource",
className="org.apache.derby.jdbc.ClientDataSource"
databaseName=”testdb”,
serverName=”localhost”,
portNumber=”1527”,
user="dbuser",
password="dbpassword" )

• Equivalents in DDs as <datasource-definition> element
• Can be defined in Servlet, EJB, Managed Beans,
Application Client and their DDs.
• Can be defined in 'global', 'app', 'module', 'comp'
scopes
48

Interceptors 1.1
 Interpose on invocations and lifecycle
events on a target class
 Defined
 Using annotations or DD
 Default Interceptors (only in DD)
 Class & Method Interceptors
 In the same transaction & security context
 Cross-cutting concerns: logging, auditing,
profiling
49

Interceptors 1.1 - Code
@InterceptorBinding
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE})
public @interface MyInterceptorBinding {
}

@Interceptor
@MyInterceptorBinding
public class MyInterceptor {
@AroundInvoke
public Object intercept(InvocationContext context) {
System.out.println(context.getMethod.getName());
System.out.println(context.getParameters());
Object result = context.proceed();

return result;
} 50
. . .

Interceptors 1.1 – Sample
Code
@Interceptors(MyInterceptor.class)
public class MyManagedBean {
. . .
}

@Inject
MyManagedBean bean;

http://blogs.sun.com/arungupta/entry/totd_134_interceptors_1_1
51

Code
@MyInterceptorBinding
. . .
}
Single instance of
Interceptor per
target class instance
. . .
}
}

52

Code
@Named
. . .

@Interceptors(AnotherInterceptor.class)
@ExcludeDefaultInterceptors
@ExcludeClassInterceptors
public void someMethod() {
. . .
}
}

53

Java Server Faces 2.0
 Facelets as “templating language” for the
page
• Custom components much easier to develop
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<title>Enter Name & Password</title>
</h:head>
<h:body>
<h1>Enter Name & Password</h1>
<h:form>
<h:panelGrid columns="2">
<h:outputText value="Name:"/>
<h:inputText value="#{simplebean.name}" title="name"
id="name" required="true"/>
<h:outputText value="Password:"/>
<h:inputText value="#{simplebean.password}" title="password"
id="password" required="true"/>
</h:panelGrid>
<h:commandButton action="show" value="submit"/>
</h:form>
</h:body> 54
</html>

JSF 2 Composite Components

55

JSF 2 Composite Components
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ez="http://java.sun.com/jsf/composite/ezcomp">
<h:head>
<title>Enter Name & Password</title>
</h:head>
<h:body>
<h1>Enter Name & Password</h1>
<h:form>
<ez:username-password/>
<h:commandButton action="show" value="submit"/>
</h:form>
. . .
</h:body>
WEB-INF
</html>
index.xhtml
resources/
ezcomp/
username-password.xhtml

http://blogs.sun.com/arungupta/entry/totd_135_jsf2_custom_components
56

Screencast - JSF

57

Contexts & Dependency
Injection – CDI (JSR 299)
 Type-safe Dependency Injection
 No String-based identifiers
 Selected at development/deployment time
 Strong typing, Loose coupling
 Context & Scope management - extensible
 Works with Java EE modular and
component architecture
 Integration with Unified Expression Language (UEL)
58

CDI
Injection Points
 Field, Method, Constructor
 0 or more qualifiers
 Type Which one ?
(Qualifier)

@Inject @LoggedIn User user
Request What ?
Injection (Type)
59

CDI – Sample Client Code
Field and Method Injection

public class CheckoutHandler {

@Inject @LoggedIn User user;

@Inject PaymentProcessor processor;

@Inject void setShoppingCart(@Default Cart cart) {
…
}

}

60

CDI – Sample Client Code
Constructor Injection


@Inject
CheckoutHandler(@LoggedIn User user,
PaymentProcessor processor,
@Default Cart cart) {
...
}

}

• Only one constructor can have @Inject
61

CDI - Sample Client Code
Multiple Qualifiers and Qualifiers with Arguments


@Inject
CheckoutHandler(@LoggedIn User user,
@Reliable
@PayBy(CREDIT_CARD)
PaymentProcessor processor,
@Default Cart cart) {
...
}

}

62

CDI - Scopes
 Beans can be declared in a scope
 Everywhere: @ApplicationScoped, @RequestScoped
 Web app: @SessionScoped
 JSF app: @ConversationScoped : begin(), end()

Transient and long-running
 Pseudo-scope (default): @Dependent
 Custom scopes via @Scope
 CDI runtime makes sure the right bean is
created at the right time
 Client do NOT have to be scope-aware
63

CDI - Named Beans
Built-in support for the Unified EL

 Beans give themselves a name with
@Named(“cart”)
 Then refer to it from a JSF or JSP page
using the EL:
<h:commandButton
value=”Checkout”
action=“#{cart.checkout}”/>

64

CDI - Events
Even more decoupling
 Annotation-based event model
 A bean observes an event
void logPrintJobs(@Observes PrintEvent event){…}

 Another bean fires an event
@Inject @Any Event<PrintEvent> myEvent;

void doPrint() {
. . .
myEvent.fire(new PrintEvent());
}

 Events can have qualifiers too
void logPrintJobs(@Observes @LargeFile PrintEvent event){…}
65

CDI
Much more ...
 Producer methods and fields
 Alternatives
 Interceptors
 Decorators
 Stereotypes
 ...

66

Screencast - CDI

67

Bean Validation (JSR 303)
 Tier-independent mechanism to define
constraints for data validation
• Represented by annotations
• javax.validation.* package
 Integrated with JSF and JPA
• JSF: f:validateRequired, f:validateRegexp
• JPA: pre-persist, pre-update, and pre-remove
 @NotNull(message=”...”), @Max, @Min,
@Size
 Fully Extensible @Email String recipient;
68

Bean Validation
Integration with JPA
 Managed classes may be configured
 Entities, Mapped superclasses, Embeddable classes
 Applied during pre-persist, pre-update,
pre-remove lifecycle events
 How to enable ?
 “validation-mode” in persistence.xml
 “javax.persistence.validation.mode” key in
Persistence.createEntityManagerFactory
 Specific set of classes can be targeted
 javax.persistence.validation.group.pre-[persist|
69
update|remove]

Bean Validation
Integration with JSF
 Individual validators not required
 Integration with EL
 f:validateBean, f:validateRequired
<h:form>
<f:validateBean>
<h:inputText value=”#{model.property}” />
<h:selectOneRadio value=”#{model.radioProperty}” > …
</h:selectOneRadio>

</f:validateBean>
</h:form>

70

JAX-RS 1.1

 Java API for building RESTful Web Services
 POJO based
 Annotation-driven
 Server-side API
 HTTP-centric

71

JAX-RS 1.1
Code Sample - Simple
@Path("helloworld")
public class HelloWorldResource {
@Context UriInfo ui;

@GET
@Produces("text/plain")
public String sayHello() {
return "Hello World";
}

@GET
@Path("morning")
public String morning() {
return “Good Morning!”;
}
}

72

JAX-RS 1.1
Code Sample – Specifying Output MIME type
@Path("/helloworld")
@Produces("text/plain")
public class HelloWorldResource {
@GET
public String doGetAsPlainText() {
. . .
}

@GET
@Produces("text/html")
public String doGetAsHtml() {
. . .
} @GET
} @Produces({
"application/xml",
"application/json"})
public String doGetAsXmlOrJson() {
. . .
}
73

JAX-RS 1.1
Code Sample – Specifying Input MIME type

@POST
@Consumes("text/plain")
public String saveMessage() {
. . .
}

74

JAX-RS 1.1
Code Sample
import javax.inject.Inject;
import javax.enterprise.context.RequestScoped;

@RequestScoped
public class ActorResource {
@Inject DatbaseBean db;

public Actor getActor(int id) {
return db.findActorById(id);
}
}

75

JAX-RS 1.1
Code Sample
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.PathParam;
import javax.inject.Inject;
import javax.enterprise.context.RequestScoped;

@Path("/actor/{id}")
@RequestScoped
public class ActorResource {
@Inject DatbaseBean db;

@GET
@Produces("application/json")
public Actor getActor(@PathParam("id") int id) {
return db.findActorById(id);
}
} http://blogs.sun.com/arungupta/entry/totd_124_using_cdi_jpa
76

JAX-RS 1.1
Integration with Java EE 6 – Servlets 3.0

 No or Portable “web.xml”
<web-app> @ApplicationPath(“resources”
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
)
public class MyApplication
<servlet-class> extends
com.sun.jersey.spi.container.servlet.ServletContainer javax.ws.rs.core.Application {
</servlet-class>
<init-param> }
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.foo.MyApplication</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/resources/*</url-pattern>
</servlet-mapping>
</web-app>

77

Screencast - JAX-RS

78

GlassFish Distributions
Distribution License Features

GlassFish Open Source CDDL & • Java EE 6 Compatibility
Edition 3.0.1 GPLv2 • No Clustering
• Clustering planned in 3.1
• mod_jk for load balancing
GlassFish Open Source CDDL & • Java EE 5 Compatibility
Edition 2.1.1 GPLv2 • In memory replication
• mod_loadbalancer
Oracle GlassFish Server Commercial • GlassFish Open Source Edition 3.0.1
Clustering
3.0.1 • Oracle GlassFish Server Control Coming
• Clustering planned in 3.1 Soon!
Oracle GlassFish Server Commercial • GlassFish Open Source Edition 2.1.1
2.1.1 • Enterprise Manager
• HADB

79

GlassFish 3 & OSGi
 No OSGi APIs are used in GlassFish
 HK2 provides abstraction layer
 All GlassFish modules are OSGi bundles
 Felix is default, also runs on Knopflerfish & Equinox
 Can run in an existing shell
 200+ modules in v3

http://blogs.sun.com/arungupta/entry/totd_103_glassfish_v3_with

80

Light Weight & On-demand
Monitoring
 Event-driven light-weight and non-intrusive
monitoring
 Modules provide domain specific probes
(monitoring events)
• EJB, Web, Connector, JPA, Jersey, Orb, Ruby
 End-to-end monitoring on Solaris using
DTrace
 3rd party scripting clients
• JavaScript to begin with 81

Boost your productivity
Retain session across deployment
asadmin redeploy –properties keepSessions=true helloworld.war

82

Boost your productivity
Deploy-on-Save

83

GlassFish 3.1 = 3.0 + 2.1.1
 Main Features
 Clustering and Centralized Administration
 High Availability
 Other ...
 Application Versioning
 Application-scoped Resources
 SSH-based remote management and monitoring
 Embedded (extensive)
 Admin Console based on RESTful API

http://wikis.sun.com/display/glassfish/GlassFishv3.1
85

References & Queries
 download.oracle.com/javaee/6/tutorial/doc
 glassfish.org
 blogs.sun.com/theaquarium
 oracle.com/goto/glassfish
 glassfish.org/roadmap
 youtube.com/user/GlassFishVideos
 Follow @glassfish
 users@glassfish.java.net
 dev@glassfish.java.net
86

Jagadish.Ramu@Sun.COM
Sun Microsystems
Thank You !

87

Java EE 6 - Deep Dive - Indic Threads, Pune - 2010

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Java EE 6 - Deep Dive - Indic Threads, Pune - 2010