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| <h1>REST Simples</h1> |
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| |
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| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Definir um serviço REST é fácil, simplesmente adicione a anotação <code>@Path</code> na classe, então defina o método HTTP (<code>@GET</code>, <code>@POST</code>, …​) ao método da classe que deseja usar.</p> |
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| <h1 id="_o_código" class="sect0">O código</h1> |
| <div class="sect1"> |
| <h2 id="_o_serviço_rest_code_path_code_code_get_code_code_post_code">O Serviço REST: <code>@Path</code>, <code>@GET</code>, <code>@POST</code></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Aqui nós temos um REST simples, anotamos a classe com <code>@Path("/greeting")</code> para indicar a rota correspondente a classe <code>GreetingService</code>. Definimos <code>message()</code> como <code>@GET</code> e <code>lowerCase()</code> como <code>@POST</code> para esta rota <code>/greeting</code>. Pronto, temos um serviço! Simples não?</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.rest; |
| |
| import jakarta.ws.rs.GET; |
| import jakarta.ws.rs.POST; |
| import jakarta.ws.rs.Path; |
| |
| @Path("/greeting") |
| public class GreetingService { |
| @GET |
| public String message() { |
| return "Hi REST!"; |
| } |
| |
| @POST |
| public String lowerCase(final String message) { |
| return "Hi REST!".toLowerCase(); |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_testando">Testando</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="_teste_para_o_serviço_jaxrs">Teste para o serviço JAXRS</h3> |
| <div class="paragraph"> |
| <p>Usamos o OpenEJB <code>ApplicationComposer</code> para facilitar o teste.</p> |
| </div> |
| <div class="paragraph"> |
| <p>A ideia é primeiro ativar os serviços <code>jaxrs</code>. Isto é feito usando a anotação <code>@EnableServices</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Então nós criamos a aplicação simplesmente retornando um objeto representando o <code>web.xml</code>. Aqui nós simplesmente o usamos para definir o contexto raiz mas você também pode usar para definir sua aplicação REST também. E para completar a aplicação nós adicionamos a anotação <code>@Classes</code> para definir o conjunto de classes a ser utilizado nesse app.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Finalmente para testar nós usamos o client API do <code>cfx</code> para chamar o serviço REST nos métodos <code>get()</code> e <code>post()</code>.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.rest; |
| |
| import org.apache.cxf.jaxrs.client.WebClient; |
| import org.apache.openejb.jee.SingletonBean; |
| import org.apache.openejb.junit.ApplicationComposer; |
| import org.apache.openejb.testing.EnableServices; |
| import org.apache.openejb.testing.Module; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.io.IOException; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| @EnableServices(value = "jaxrs") |
| @RunWith(ApplicationComposer.class) |
| public class GreetingServiceTest { |
| @Module |
| public SingletonBean app() { |
| return (SingletonBean) new SingletonBean(GreetingService.class).localBean(); |
| } |
| |
| @Test |
| public void get() throws IOException { |
| final String message = WebClient.create("http://localhost:4204").path("/GreetingServiceTest/greeting/").get(String.class); |
| assertEquals("Hi REST!", message); |
| } |
| |
| @Test |
| public void post() throws IOException { |
| final String message = WebClient.create("http://localhost:4204").path("/GreetingServiceTest/greeting/").post("Hi REST!", String.class); |
| assertEquals("hi rest!", message); |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <h1 id="_running" class="sect0">Running</h1> |
| <div class="paragraph"> |
| <p>Executar o exemplo é bastante simples. No diretório <code>simple-rest</code> dê o seguinte comando:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">$ mvn clean install</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Com isso, provavelmente você terá a seguinte saida.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">INFO - Cannot find the configuration file [conf/openejb.xml]. Will attempt to create one for the beans deployed. |
| 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 - Creating TransactionManager(id=Default Transaction Manager) |
| INFO - Creating SecurityService(id=Default Security Service) |
| INFO - Initializing network services |
| INFO - Creating ServerService(id=httpejbd) |
| INFO - Creating ServerService(id=cxf-rs) |
| INFO - Initializing network services |
| INFO - Starting service httpejbd |
| INFO - Started service httpejbd |
| INFO - Starting service cxf-rs |
| INFO - Started service cxf-rs |
| INFO - ** Bound Services ** |
| INFO - NAME IP PORT |
| INFO - httpejbd 127.0.0.1 4204 |
| INFO - ------- |
| INFO - Ready! |
| INFO - Configuring enterprise application: /opt/dev/openejb/openejb-trunk/examples/GreetingServiceTest |
| INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container) |
| INFO - Auto-creating a container for bean org.superbiz.rest.GreetingServiceTest: Container(type=MANAGED, id=Default Managed Container) |
| INFO - Creating Container(id=Default Managed Container) |
| INFO - Using directory /tmp for stateful session passivation |
| INFO - Enterprise application "/opt/dev/openejb/openejb-trunk/examples/GreetingServiceTest" loaded. |
| INFO - Assembling app: /opt/dev/openejb/openejb-trunk/examples/GreetingServiceTest |
| INFO - Existing thread singleton service in SystemInstance() null |
| INFO - Created new singletonService org.apache.openejb.cdi.ThreadSingletonServiceImpl@12c9b196 |
| INFO - Succeeded in installing singleton service |
| INFO - OpenWebBeans Container is starting... |
| INFO - Adding OpenWebBeansPlugin : [CdiPlugin] |
| INFO - All injection points are validated successfully. |
| INFO - OpenWebBeans Container has started, it took 11 ms. |
| INFO - Deployed Application(path=/opt/dev/openejb/openejb-trunk/examples/GreetingServiceTest) |
| INFO - Setting the server's publish address to be http://127.0.0.1:4204/test |
| INFO - REST Service: http://127.0.0.1:4204/test/greeting/.* -> Pojo org.superbiz.rest.GreetingService |
| INFO - Undeploying app: /opt/dev/openejb/openejb-trunk/examples/GreetingServiceTest |
| INFO - Stopping network services |
| INFO - Stopping server services |
| Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.004 sec |
| |
| Results : |
| |
| Tests run: 2, Failures: 0, Errors: 0, Skipped: 0</code></pre> |
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