tomee-9.0/pt/examples/jsf-cdi-and-ejb.html - tomee-site-pub - Git at Google

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     <div id="main-block" class="container main-block">
         <div class="row title">
           <div class="col-md-12">
             <div class='page-header'>

               <h1>JSF-CDI-EJB</h1>
             </div>
           </div>
         </div>
         <div class="row">

             <div class="col-md-12">
                 <div id="preamble">
 <div class="sectionbody">
 <div class="paragraph">
 <p>Aplicação simples que contém um CDI managed bean <code>CalculatorBean</code>,
 que usa o EJB <code>Calculator</code> para adicionar dois números e mostrar os resultados para o usuário. O EJB é injetado no managed bean usando a anotação
 @Inject.</p>
 </div>
 <div class="paragraph">
 <p>Você poderia executar isso no último Apache TomEE
 <a href="https://repository.apache.org/content/repositories/snapshots/org/apache/openejb/apache-tomee/">snapshot</a></p>
 </div>
 <div class="paragraph">
 <p>O código completo está abaixo, mas vamos quebrá-lo para olhar para alguns trechos menores e ver como ele funciona.</p>
 </div>
 <div class="paragraph">
 <p>Uma pequena nota sobre a configuração:</p>
 </div>
 <div class="paragraph">
 <p>Quanto as bibliotecas, myfaces-api e myfaces-impl são fornecidas em
 tomee/lib e, portanto não devem ser parte do war. Nos termos do Maven, eles estariam com o escopo `provided'</p>
 </div>
 <div class="paragraph">
 <p>Observe também que nós usamos a declaração servlet 2.5 no web.xml</p>
 </div>
 <div class="paragraph">
 <p>E nós usamos a versão 2.0 do faces-config</p>
 </div>
 <div class="paragraph">
 <p>Para tornar este em um cdi-aware-archive (ou seja, arquivo Bean) um beans.xml vazio
 é adicionado no WEB-INF</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">   &lt;?xml version="1.0" encoding="UTF-8"?&gt;

    &lt;beans 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/beans_1_0.xsd"&gt;
    &lt;/beans&gt;</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>Nós primeiro vamos declarar o FacesServlet no web.xml</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">  &lt;servlet&gt;
     &lt;servlet-name&gt;Faces Servlet&lt;/servlet-name&gt;
     &lt;servlet-class&gt;jakarta.faces.webapp.FacesServlet&lt;/servlet-class&gt;
     &lt;load-on-startup&gt;1&lt;/load-on-startup&gt;
   &lt;/servlet&gt;</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>FacesServlet atua como o controlador mestre.</p>
 </div>
 <div class="paragraph">
 <p>Em seguida criaremos o arquivo calculator.xhtml.</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">       &lt;h:outputText value='Enter first number'/&gt;
        &lt;h:inputText value='#{calculatorBean.x}'/&gt;
        &lt;h:outputText value='Enter second number'/&gt;
        &lt;h:inputText value='#{calculatorBean.y}'/&gt;
        &lt;h:commandButton action="#{calculatorBean.add}" value="Add"/&gt;</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>Observe como usamos o bean aqui. Por padrão, o nome do bean seria o nome simples da classe bean com a primeira letra minúscula</p>
 </div>
 <div class="paragraph">
 <p>Nós temos o <code>CalculatorBean</code> anotado com <code>@RequestScoped</code>. Então quando uma requisição vem, o bean é instanciado e colocado no escopo da requisição.</p>
 </div>
 <div class="paragraph">
 <p>Aqui, o método getX() do calculatorBean é invocado e valor do resultado é apresentado. x sendo um Double, nós devemos ver justamente 0.0 sendo exibido.</p>
 </div>
 <div class="paragraph">
 <p>Quando você modifica o valor e submete o formulário, esses valores inseridos são vinculados no bean usando os setters e então o método commandButton-action é invocado.</p>
 </div>
 <div class="paragraph">
 <p>Neste caso, CalculatorBean#add() é invocado.</p>
 </div>
 <div class="paragraph">
 <p>Calculator#add() delega o trabalho para o ejb, obtém o resultado, armazena-o e, em seguida, retorna qual view deve ser processada.</p>
 </div>
 <div class="paragraph">
 <p>O valor de retorno <code>success</code> é verificado no faces-config
 navigation-rules e a respectiva página é renderizada.</p>
 </div>
 <div class="paragraph">
 <p>No nosso caso, a página <code>result.xhtml</code> é renderizada onde usar EL e mostra o resultado do request-scoped <code>calculatorBean</code>.</p>
 </div>
 </div>
 </div>
 <h1 id="_código_fonte" class="sect0">Código-fonte</h1>
 <div class="sect1">
 <h2 id="_calculatorbean">CalculatorBean</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">import jakarta.enterprise.context.RequestScoped;
 import jakarta.inject.Named;
 import jakarta.inject.Inject;

 @RequestScoped
 @Named
 public class CalculatorBean {
     @Inject
     Calculator calculator;
     private double x;
     private double y;
     private double result;

     public double getX() {
         return x;
     }

     public void setX(double x) {
         this.x = x;
     }

     public double getY() {
         return y;
     }

     public void setY(double y) {
         this.y = y;
     }

     public double getResult() {
         return result;
     }

     public void setResult(double result) {
         this.result = result;
     }

     public String add() {
         result = calculator.add(x, y);
         return "success";
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_calculator">Calculator</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.jsf;

 import jakarta.ejb.Stateless;

 @Stateless
 public class Calculator{

     public double add(double x, double y) {
         return x + y;
     }
 }</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>#web.xml</p>
 </div>
 <div class="paragraph">
 <p>MyProject web.xml</p>
 </div>
 <div class="paragraph">
 <p>Faces Servlet jakarta.faces.webapp.FacesServlet 1</p>
 </div>
 <div class="paragraph">
 <p>Faces Servlet *.jsf</p>
 </div>
 <div class="paragraph">
 <p>index.jsp index.html</p>
 </div>
 <div class="paragraph">
 <p>#Calculator.xhtml</p>
 </div>
 <div class="paragraph">
 <p>&lt;!DOCTYPE html PUBLIC <code>-//W3C//DTD XHTML 1.0 Transitional//EN''
 </code><a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt" class="bare">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt</a>;</p>
 </div>
 <div class="paragraph">
 <p>#Result.xhtml</p>
 </div>
 <div class="paragraph">
 <p>&lt;!DOCTYPE html PUBLIC <code>-//W3C//DTD XHTML 1.0 Transitional//EN''
 </code><a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt" class="bare">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt</a>;</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">    &lt;h:commandLink action="back"&gt;
         &lt;h:outputText value="Home"/&gt;
     &lt;/h:commandLink&gt;
 &lt;/h:form&gt;</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>#faces-config.xml</p>
 </div>
 <div class="paragraph">
 <p>/calculator.xhtml success /result.xhtml</p>
 </div>
 <div class="paragraph">
 <p>/result.xhtml back /calculator.xhtml</p>
 </div>
 </div>
 </div>
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	<div id="main-block" class="container main-block">
	<div class="row title">
	<div class="col-md-12">
	<div class='page-header'>

	<h1>JSF-CDI-EJB</h1>
	</div>
	</div>
	</div>
	<div class="row">

	<div class="col-md-12">
	<div id="preamble">
	<div class="sectionbody">
	<div class="paragraph">
	<p>Aplicação simples que contém um CDI managed bean <code>CalculatorBean</code>,
	que usa o EJB <code>Calculator</code> para adicionar dois números e mostrar os resultados para o usuário. O EJB é injetado no managed bean usando a anotação
	@Inject.</p>
	</div>
	<div class="paragraph">
	<p>Você poderia executar isso no último Apache TomEE
	<a href="https://repository.apache.org/content/repositories/snapshots/org/apache/openejb/apache-tomee/">snapshot</a></p>
	</div>
	<div class="paragraph">
	<p>O código completo está abaixo, mas vamos quebrá-lo para olhar para alguns trechos menores e ver como ele funciona.</p>
	</div>
	<div class="paragraph">
	<p>Uma pequena nota sobre a configuração:</p>
	</div>
	<div class="paragraph">
	<p>Quanto as bibliotecas, myfaces-api e myfaces-impl são fornecidas em
	tomee/lib e, portanto não devem ser parte do war. Nos termos do Maven, eles estariam com o escopo `provided'</p>
	</div>
	<div class="paragraph">
	<p>Observe também que nós usamos a declaração servlet 2.5 no web.xml</p>
	</div>
	<div class="paragraph">
	<p>E nós usamos a versão 2.0 do faces-config</p>
	</div>
	<div class="paragraph">
	<p>Para tornar este em um cdi-aware-archive (ou seja, arquivo Bean) um beans.xml vazio
	é adicionado no WEB-INF</p>
	</div>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java"> <?xml version="1.0" encoding="UTF-8"?>

	<beans 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/beans_1_0.xsd">
	</beans></code></pre>
	</div>
	</div>
	<div class="paragraph">
	<p>Nós primeiro vamos declarar o FacesServlet no web.xml</p>
	</div>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java"> <servlet>
	<servlet-name>Faces Servlet</servlet-name>
	<servlet-class>jakarta.faces.webapp.FacesServlet</servlet-class>
	<load-on-startup>1</load-on-startup>
	</servlet></code></pre>
	</div>
	</div>
	<div class="paragraph">
	<p>FacesServlet atua como o controlador mestre.</p>
	</div>
	<div class="paragraph">
	<p>Em seguida criaremos o arquivo calculator.xhtml.</p>
	</div>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java"> <h:outputText value='Enter first number'/>
	<h:inputText value='#{calculatorBean.x}'/>
	<h:outputText value='Enter second number'/>
	<h:inputText value='#{calculatorBean.y}'/>
	<h:commandButton action="#{calculatorBean.add}" value="Add"/></code></pre>
	</div>
	</div>
	<div class="paragraph">
	<p>Observe como usamos o bean aqui. Por padrão, o nome do bean seria o nome simples da classe bean com a primeira letra minúscula</p>
	</div>
	<div class="paragraph">
	<p>Nós temos o <code>CalculatorBean</code> anotado com <code>@RequestScoped</code>. Então quando uma requisição vem, o bean é instanciado e colocado no escopo da requisição.</p>
	</div>
	<div class="paragraph">
	<p>Aqui, o método getX() do calculatorBean é invocado e valor do resultado é apresentado. x sendo um Double, nós devemos ver justamente 0.0 sendo exibido.</p>
	</div>
	<div class="paragraph">
	<p>Quando você modifica o valor e submete o formulário, esses valores inseridos são vinculados no bean usando os setters e então o método commandButton-action é invocado.</p>
	</div>
	<div class="paragraph">
	<p>Neste caso, CalculatorBean#add() é invocado.</p>
	</div>
	<div class="paragraph">
	<p>Calculator#add() delega o trabalho para o ejb, obtém o resultado, armazena-o e, em seguida, retorna qual view deve ser processada.</p>
	</div>
	<div class="paragraph">
	<p>O valor de retorno <code>success</code> é verificado no faces-config
	navigation-rules e a respectiva página é renderizada.</p>
	</div>
	<div class="paragraph">
	<p>No nosso caso, a página <code>result.xhtml</code> é renderizada onde usar EL e mostra o resultado do request-scoped <code>calculatorBean</code>.</p>
	</div>
	</div>
	</div>
	<h1 id="_código_fonte" class="sect0">Código-fonte</h1>
	<div class="sect1">
	<h2 id="_calculatorbean">CalculatorBean</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">import jakarta.enterprise.context.RequestScoped;
	import jakarta.inject.Named;
	import jakarta.inject.Inject;

	@RequestScoped
	@Named
	public class CalculatorBean {
	@Inject
	Calculator calculator;
	private double x;
	private double y;
	private double result;

	public double getX() {
	return x;
	}

	public void setX(double x) {
	this.x = x;
	}

	public double getY() {
	return y;
	}

	public void setY(double y) {
	this.y = y;
	}

	public double getResult() {
	return result;
	}

	public void setResult(double result) {
	this.result = result;
	}

	public String add() {
	result = calculator.add(x, y);
	return "success";
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_calculator">Calculator</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.jsf;

	import jakarta.ejb.Stateless;

	@Stateless
	public class Calculator{

	public double add(double x, double y) {
	return x + y;
	}
	}</code></pre>
	</div>
	</div>
	<div class="paragraph">
	<p>#web.xml</p>
	</div>
	<div class="paragraph">
	<p>MyProject web.xml</p>
	</div>
	<div class="paragraph">
	<p>Faces Servlet jakarta.faces.webapp.FacesServlet 1</p>
	</div>
	<div class="paragraph">
	<p>Faces Servlet *.jsf</p>
	</div>
	<div class="paragraph">
	<p>index.jsp index.html</p>
	</div>
	<div class="paragraph">
	<p>#Calculator.xhtml</p>
	</div>
	<div class="paragraph">
	<p><!DOCTYPE html PUBLIC <code>-//W3C//DTD XHTML 1.0 Transitional//EN''
	</code><a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt" class="bare">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt</a>;</p>
	</div>
	<div class="paragraph">
	<p>#Result.xhtml</p>
	</div>
	<div class="paragraph">
	<p><!DOCTYPE html PUBLIC <code>-//W3C//DTD XHTML 1.0 Transitional//EN''
	</code><a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt" class="bare">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd''&gt</a>;</p>
	</div>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java"> <h:commandLink action="back">
	<h:outputText value="Home"/>
	</h:commandLink>
	</h:form></code></pre>
	</div>
	</div>
	<div class="paragraph">
	<p>#faces-config.xml</p>
	</div>
	<div class="paragraph">
	<p>/calculator.xhtml success /result.xhtml</p>
	</div>
	<div class="paragraph">
	<p>/result.xhtml back /calculator.xhtml</p>
	</div>
	</div>
	</div>
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