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<h1>CDI @RequestScoped</h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Este exemplo mostra o uso da anotação <code>@RequestScoped</code> para objetos injetados. Um objeto que é
definido como <code>@RequestScoped</code> é criado uma vez para cada requisição e é compartilhado por todos os
beans que o injetam através do mesmo request.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_exemplo">Exemplo</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Este exemplo retrata um cenário similar ao cdi-application-scope. O visitante de um restaurante
pede uma sopa ao garçom. O pedido é passado para o chefe que prepara o prato e o devolve ao garçom
que entrega para o visitante.</p>
</div>
<div class="sect2">
<h3 id="_waiter_garçom">Waiter (garçom)</h3>
<div class="paragraph">
<p>O <code>Waiter</code> session bean recebe uma requisição através do método <code>orderSoup()</code> da classe de teste.
Uma instância de <code>Soup</code> será criada nesse método e ela será compartilhada em toda a requisição com o
bean <code>Chef</code>. O método passa o request para o bean <code>Chef</code>. Ele então retorna o nome da sopa para a
classe de teste.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">@Stateless
public class Waiter {
@Inject
private Soup soup;
@EJB
private Chef chef;
public String orderSoup(String name){
soup.setName(name);
return chef.prepareSoup().getName();
}
}</code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_soup_sopa">Soup (sopa)</h3>
<div class="paragraph">
<p>A classe <code>Soup</code> é um POJO injetável, definida como <code>@RequestScoped</code>. Isso significa que uma instância
será criada apenas uma vez para cada request e será compartilhada por todos os beans que a injetam.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">@RequestScoped
public class Soup {
private String name = "Soup of the day";
@PostConstruct
public void afterCreate() {
System.out.println("Soup created");
}
public String getName() {
return name;
}
public void setName(String name){
this.name = name;
}
}</code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_chef">Chef</h3>
<div class="paragraph">
<p>A classe <code>Chef</code> é um simples session bean com um campo <code>Soup</code> injetado. Normalmente, o parâmetro soup
seria passado para o <code>prepareSoup()</code> como argumento, mas para as necessidades deste exemplo será
passado pelo contexto da requisição.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">@Stateless
public class Chef {
@Inject
private Soup soup;
public Soup prepareSoup() {
return soup;
}
}</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_caso_de_teste">Caso de teste</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Esta é a classe de entrada para este exemplo.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">public class RestaurantTest {
private static String TOMATO_SOUP = "Tomato Soup";
private EJBContainer container;
@EJB
private Waiter joe;
@Before
public void startContainer() throws Exception {
container = EJBContainer.createEJBContainer();
container.getContext().bind("inject", this);
}
@Test
public void orderSoup(){
String soup = joe.orderSoup(TOMATO_SOUP);
assertEquals(TOMATO_SOUP, soup);
soup = joe.orderSoup(POTATO_SOUP);
assertEquals(POTATO_SOUP, soup);
}
@After
public void closeContainer() throws Exception {
container.close();
}
}</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_executando">Executando</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Na saida você pode ver que existem duas instâncias de <code>Soup</code> criadas - uma para cada requisição.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running org.superbiz.cdi.requestscope.RestaurantTest
Apache OpenEJB 7.0.0-SNAPSHOT build: 20111224-11:09
http://tomee.apache.org/
INFO - openejb.home = C:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope
INFO - openejb.base = C:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope
INFO - Using 'javax.ejb.embeddable.EJBContainer=true'
INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)
INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)
INFO - Found EjbModule in classpath: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope\target\classes
INFO - Beginning load: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope\target\classes
INFO - Configuring enterprise application: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope
INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
INFO - Auto-creating a container for bean cdi-request-scope.Comp: Container(type=MANAGED, id=Default Managed Container)
INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
INFO - Auto-creating a container for bean Chef: Container(type=STATELESS, id=Default Stateless Container)
INFO - Enterprise application "c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope" loaded.
INFO - Assembling app: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope
INFO - Jndi(name="java:global/cdi-request-scope/Chef!org.superbiz.cdi.requestscope.Chef")
INFO - Jndi(name="java:global/cdi-request-scope/Chef")
INFO - Jndi(name="java:global/cdi-request-scope/Waiter!org.superbiz.cdi.requestscope.Waiter")
INFO - Jndi(name="java:global/cdi-request-scope/Waiter")
INFO - Created Ejb(deployment-id=Chef, ejb-name=Chef, container=Default Stateless Container)
INFO - Created Ejb(deployment-id=Waiter, ejb-name=Waiter, container=Default Stateless Container)
INFO - Started Ejb(deployment-id=Chef, ejb-name=Chef, container=Default Stateless Container)
INFO - Started Ejb(deployment-id=Waiter, ejb-name=Waiter, container=Default Stateless Container)
INFO - Deployed Application(path=c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope)
Soup created
Soup created
INFO - Undeploying app: c:\Users\Daniel\workspaces\openejb\openejb\examples\cdi-request-scope
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.412 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
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