You'll need to download JBoss AS 5.0.1.GA from jboss.org, and unzip it. For example:

$ cd /Applications
$ unzip ~/jboss-5.0.1.GA.zip

Next, download Web Beans from seamframework.org, and unzip it. For example

$ cd ~/
$ unzip ~/webbeans-$VERSION.zip

Next, we need to tell Web Beans where JBoss is located. Edit jboss-as/build.properties and set the jboss.home property. For example:

jboss.home=/Applications/jboss-5.0.1.GA

To install Web Beans, you'll need Ant 1.7.0 installed, and the ANT_HOME environment variable set. For example:

$ unzip apache-ant-1.7.0.zip
$ export ANT_HOME=~/apache-ant-1.7.0

Then, you can install the update. The update script will use Maven to download Web Beans automatically.

$ cd webbeans-$VERSION/jboss-as
$ ant update

Now, you're ready to deploy your first example!

To deploy the numberguess example:

$ cd examples/numberguess
ant deploy

Start JBoss AS:

$ /Application/jboss-5.0.0.GA/bin/run.sh

Wait for the application to deploy, and enjoy hours of fun at http://localhost:8080/webbeans-numberguess!

Web Beans includes a second simple example that will translate your text into Latin. The numberguess example is a war example, and uses only simple beans; the translator example is an ear example, and includes enterprise beans, packaged in an EJB module. To try it out:

$ cd examples/translator
ant deploy

Wait for the application to deploy, and visit http://localhost:8080/webbeans-translator!

You'll need to download Tomcat 6.0.18 or later from tomcat.apache.org, and unzip it. For example:

$ cd /Applications
$ unzip ~/apache-tomcat-6.0.18.zip

Next, download Web Beans from seamframework.org, and unzip it. For example

$ cd ~/
$ unzip ~/webbeans-$VERSION.zip

Next, we need to tell Web Beans where Tomcat is located. Edit jboss-as/build.properties and set the tomcat.home property. For example:

tomcat.home=/Applications/apache-tomcat-6.0.18

To deploy the numberguess example for tomcat:

$ cd examples/tomcat
ant tomcat.deploy

Start Tomcat:

$ /Applications/apache-tomcat-6.0.18/bin/startup.sh

Wait for the application to deploy, and enjoy hours of fun at http://localhost:8080/webbeans-numberguess!

TODO

In the numberguess application you get given 10 attempts to guess a number between 1 and 100. After each attempt, you will be told whether you are too high, or too low.

The numberguess example is comprised of a number of Web Beans, configuration files, and Facelet JSF pages, packaged as a war. Let's start with the configuration files.

All the configuration files for this example are located in WEB-INF/, which is stored in WebContent in the source tree. First, we have faces-config.xml, in which we tell JSF to use Facelets:

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

<faces-config version="1.2"

              xmlns="http://java.sun.com/xml/ns/javaee"

              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

              xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">

    

    <application>

        <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>

    </application>



</faces-config>

There is an empty web-beans.xml file, which marks this application as a Web Beans application.

Finally there is web.xml:

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
   
   <display-name>Web Beans Numbergues example</display-name>

   <!-- JSF -->

   <servlet>  
      <servlet-name>Faces Servlet</servlet-name>
      <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
   </servlet>

   <servlet-mapping>
      <servlet-name>Faces Servlet</servlet-name>
      <url-pattern>*.jsf</url-pattern>
   </servlet-mapping>
   
   <context-param>
      <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
      <param-value>.xhtml</param-value>
   </context-param>

   <session-config>
      <session-timeout>10</session-timeout>
   </session-config>

</web-app>

	Enable and load the JSF servlet
	Configure requests to .jsf pages to be handled by JSF
	Tell JSF that we will be giving our source files (facelets) an extension of .xhtml
	Configure a session timeout of 10 minutes

Let's take a look at the Facelet view:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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:f="http://java.sun.com/jsf/core"
    xmlns:s="http://jboss.com/products/seam/taglib">

  <ui:composition template="template.xhtml">
    <ui:define name="content">
       <h1>Guess a number...</h1>
       <h:form id="NumberGuessMain">
          <div style="color: red">
             <h:messages id="messages" globalOnly="false"/>
             <h:outputText id="Higher" value="Higher!" rendered="#{game.number gt game.guess and game.guess ne 0}"/>
             <h:outputText id="Lower" value="Lower!" rendered="#{game.number lt game.guess and game.guess ne 0}"/>
          </div>
   
          <div>
             I'm thinking of a number between #{game.smallest} and #{game.biggest}.
             You have #{game.remainingGuesses} guesses.
          </div>
     
          <div>
             Your guess: 
             <h:inputText id="inputGuess" 
                          value="#{game.guess}" 
                          required="true" 
                          size="3" 
                          disabled="#{game.number eq game.guess}">
                <f:validateLongRange maximum="#{game.biggest}" 
                                     minimum="#{game.smallest}"/>
             </h:inputText>
            <h:commandButton id="GuessButton"  
                             value="Guess" 
                             action="#{game.check}" 
                             disabled="#{game.number eq game.guess}"/>
          </div>
          <div>
            <h:commandButton id="RestartButton" value="Reset" action="#{game.reset}" immediate="true" />
          </div>
       </h:form>
    </ui:define>
  </ui:composition>
</html>

	Facelets is a templating language for JSF, here we are wrapping our page in a template which defines the header.
	There are a number of messages which can be sent to the user, "Higher!", "Lower!" and "Correct!"
	As the user guesses, the range of numbers they can guess gets smaller - this sentance changes to make sure they know what range to guess in.
	This input field is bound to a Web Bean, using the value expression.
	A range validator is used to make sure the user doesn't accidentally input a number outside of the range in which they can guess - if the validator wasn't here, the user might use up a guess on an out of range number.
	And, of course, there must be a way for the user to send their guess to the server. Here we bind to an action method on the Web Bean.

The example exists of 4 classes, the first two of which are binding types. First, there is the @Random binding type, used for injecting a random number:

@Target( { TYPE, METHOD, PARAMETER, FIELD })

@Retention(RUNTIME)

@Documented

@BindingType

public @interface Random {}

There is also the @MaxNumber binding type, used for injecting the maximum number that can be injected:

@Target( { TYPE, METHOD, PARAMETER, FIELD })

@Retention(RUNTIME)

@Documented

@BindingType

public @interface MaxNumber {}

The Generator class is responsible for creating the random number, via a producer method. It also exposes the maximum possible number via a producer method:

@ApplicationScoped

public class Generator {

   

   private java.util.Random random = new java.util.Random( System.currentTimeMillis() );

   

   private int maxNumber = 100;

   

   java.util.Random getRandom()

   {

      return random;

   }

   

   @Produces @Random int next() { 

      return getRandom().nextInt(maxNumber); 

   }

   

   @Produces @MaxNumber int getMaxNumber()

   {

      return maxNumber;

   }


}

You'll notice that the Generator is application scoped; therefore we don't get a different random each time.

The final Web Bean in the application is the session scoped Game.

You'll note that we've used the @Named annotation, so that we can use the bean through EL in the JSF page. Finally, we've used constructor injection to initialize the game with a random number. And of course, we need to tell the player when they've won, so we give feedback with a FacesMessage.

package org.jboss.webbeans.examples.numberguess;



import javax.annotation.PostConstruct;

import javax.faces.application.FacesMessage;

import javax.faces.context.FacesContext;

import javax.webbeans.AnnotationLiteral;

import javax.webbeans.Current;

import javax.webbeans.Initializer;

import javax.webbeans.Named;

import javax.webbeans.SessionScoped;

import javax.webbeans.manager.Manager;


@Named

@SessionScoped

public class Game

{

   private int number;

   

   private int guess;

   private int smallest;

   private int biggest;

   private int remainingGuesses;

   

   @Current Manager manager;

   

   public Game()

   {

   }

   

   @Initializer

   Game(@MaxNumber int maxNumber)

   {      

      this.biggest = maxNumber;

   }


   public int getNumber()

   {

      return number;

   }

   

   public int getGuess()

   {

      return guess;

   }

   

   public void setGuess(int guess)

   {

      this.guess = guess;

   }

   

   public int getSmallest()

   {

      return smallest;

   }

   

   public int getBiggest()

   {

      return biggest;

   }

   

   public int getRemainingGuesses()

   {

      return remainingGuesses;

   }

   

   public String check()

   {

      if (guess>number)

      {

         biggest = guess - 1;

      }

      if (guess<number)

      {

         smallest = guess + 1;

      }

      if (guess == number)

      {

         FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Correct!"));

      }

      remainingGuesses--;

      return null;

   }

   

   @PostConstruct

   public void reset()

   {

      this.smallest = 0;

      this.guess = 0;

      this.remainingGuesses = 10;

      this.number = manager.getInstanceByType(Integer.class, new AnnotationLiteral<Random>(){});

   }

   

}

<listener>
   <listener-class>org.jboss.webbeans.environment.tomcat.Listener</listener-class>
</listener>

The translator example will take any sentences you enter, and translate them to Latin.

The translator example is built as an ear, and contains EJBs. As a result, it's structure is more complex than the numberguess example.

First, let's take a look at the ear aggregator, which is located in webbeans-translator-ear module. Maven automatically generates the application.xml for us:

<plugin>

   <groupId>org.apache.maven.plugins</groupId>

   <artifactId>maven-ear-plugin</artifactId>

   <configuration>

      <modules>

         <webModule>

            <groupId>org.jboss.webbeans.examples.translator</groupId>

            <artifactId>webbeans-translator-war</artifactId>

            <contextRoot>/webbeans-translator</contextRoot>

         </webModule>

      </modules>

   </configuration>

</plugin>

Here we set the context path, which gives us a nice url (http://localhost:8080/webbeans-translator).

<?xml version="1.0" encoding="UTF-8"?>

<application xmlns="http://java.sun.com/xml/ns/javaee" 

             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

             xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_5.xsd"

             version="5">

  <display-name>webbeans-translator-ear</display-name>

  <description>Ear Example for the reference implementation of JSR 299: Web Beans</description>

  

  <module>

    <web>

      <web-uri>webbeans-translator.war</web-uri>

      <context-root>/webbeans-translator</context-root>

    </web>

  </module>

  <module>

    <ejb>webbeans-translator.jar</ejb>

  </module>

</application>

Next, lets look at the war. Just as in the numberguess example, we have a faces-config.xml (to enable Facelets) and a web.xml (to enable JSF) in WebContent/WEB-INF.

More intersting is the facelet used to translate text. Just as in the numberguess example we have a template, which surrounds the form (ommitted here for brevity):

<h:form id="NumberGuessMain">

            

   <table>

      <tr align="center" style="font-weight: bold" >

         <td>

            Your text

         </td>

         <td>

            Translation

         </td>

      </tr>

      <tr>

         <td>

            <h:inputTextarea id="text" value="#{translator.text}" required="true" rows="5" cols="80" />

         </td>

         <td>

            <h:outputText value="#{translator.translatedText}" />

         </td>

      </tr>

   </table>

   <div>

      <h:commandButton id="button" value="Translate" action="#{translator.translate}"/>

   </div>

   

</h:form>

The user can enter some text in the lefthand textarea, and hit the translate button to see the result to the right.

Finally, let's look at the ejb module, webbeans-translator-ejb. In src/main/resources/META-INF there is just an empty web-beans.xml, used to mark the archive as containing Web Beans.

We've saved the most interesting bit to last, the code! The project has two simple beans, SentenceParser and TextTranslator and two enterprise beans, TranslatorControllerBean and SentenceTranslator. You should be getting quite familiar with what a Web Bean looks like by now, so we'll just highlight the most interesting bits here.

Both SentenceParser and TextTranslator are dependent beans, and TextTranslator uses constructor initialization:

public class TextTranslator { 

   private SentenceParser sentenceParser; 

   private Translator sentenceTranslator; 

   

   @Initializer

   TextTranslator(SentenceParser sentenceParser, Translator sentenceTranslator) 

   { 

      this.sentenceParser = sentenceParser; 

      this.sentenceTranslator = sentenceTranslator;

TextTranslator is a stateless bean (with a local business interface), where the magic happens - of course, we couldn't develop a full translator, but we gave it a good go!

Finally, there is UI orientated controller, that collects the text from the user, and dispatches it to the translator. This is a request scoped, named, stateful session bean, which injects the translator.

@Stateful

@RequestScoped

@Named("translator")

public class TranslatorControllerBean implements TranslatorController

{

   

   @Current TextTranslator translator;

The bean also has getters and setters for all the fields on the page.

As this is a stateful session bean, we have to have a remove method:

   @Remove

   public void remove()

   {

      

   }

The Web Beans manager will call the remove method for you when the bean is destroyed; in this case at the end of the request.