master/pt/examples/cdi-produces-disposes.html - tomee-site-pub - Git at Google

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     <div id="main-block" class="container main-block">
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               <h1>CDI Produces Disposes</h1>
             </div>
           </div>
         </div>
         <div class="row">

             <div class="col-md-12">
                 <div id="preamble">
 <div class="sectionbody">
 <div class="paragraph">
 <p>Esté exemplo demostra como as anotações @Produces e @Disposes trabalham. Um LogFactory cria uma instância do LogHandler
 dependendo de um atributo "type". Para o propósito deste exemplo, o type é hard-coded para especificar um valor.
 Uma implementação Logger deve conter uma lista de LogHandlers.</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>Teremos três implementações da interface LogHandler:</pre>
 </div>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>Uma DatabaseHandler</p>
 </li>
 <li>
 <p>Uma FileHandler</p>
 </li>
 <li>
 <p>Uma ConsoleHandler</p>
 </li>
 </ul>
 </div>
 <div class="paragraph">
 <p>O DatabaseHandler aparentemente gravaria os logs em um banco de dados.</p>
 </div>
 <div class="paragraph">
 <p>O FileHandler gravaria os logs em um arquivo.</p>
 </div>
 <div class="paragraph">
 <p>O ConsoleHandler apenas imprimiria os logs para um console (saída padrão).</p>
 </div>
 <div class="paragraph">
 <p>Esté exemplo é apenas uma ilustração de como os conceitos dentro do CDI funcionam e não destina-se a fornecer uma implementação/design de um framework de log.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_consolehandler">ConsoleHandler</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 public class ConsoleHandler implements LogHandler {

     private String name;

     public ConsoleHandler(String name) {
         this.name = name;
     }

     @Override
     public String getName() {
         return name;
     }

     @Override
     public void writeLog(String s) {
         System.out.printf("##### Handler: %s, Writing to the console!\n", getName());
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_databasehandler">DatabaseHandler</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 public class DatabaseHandler implements LogHandler {

     private String name;

     public DatabaseHandler(String name) {
         this.name = name;
     }

     @Override
     public String getName() {
         return name;
     }

     @Override
     public void writeLog(String s) {
         System.out.printf("##### Handler: %s, Writing to the database!\n", getName());
         // Use conexão para gravar log no banco de dados
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_filehandler">FileHandler</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 public class FileHandler implements LogHandler {

     private String name;

     public FileHandler(String name) {
         this.name = name;
     }

     @Override
     public String getName() {
         return name;
     }

     @Override
     public void writeLog(String s) {
         System.out.printf("##### Handler: %s, Writing to the file!\n", getName());
         // Escreva para o arquivo de log
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_logfactory">LogFactory</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 import javax.enterprise.inject.Disposes;
 import javax.enterprise.inject.Produces;

 public class LogFactory {

     private int type = 2;

     @Produces
     public LogHandler getLogHandler() {
         switch (type) {
             case 1:
                 return new FileHandler("@Produces created FileHandler!");
             case 2:
                 return new DatabaseHandler("@Produces created DatabaseHandler!");
             case 3:
             default:
                 return new ConsoleHandler("@Produces created ConsoleHandler!");
         }
     }

     public void closeLogHandler(@Disposes LogHandler handler) {
         switch (type) {
             case 1:
                 System.out.println("Closing File handler!");
                 break;
             case 2:
                 System.out.println("Closing DB handler!");
                 break;
             case 3:
             default:
                 System.out.println("Closing Console handler!");
         }
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_logger">Logger</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 public interface Logger {

     public void log(String s);

     public LogHandler getHandler();
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_loggerimpl">LoggerImpl</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 import javax.inject.Inject;
 import javax.inject.Named;

 @Named("logger")
 public class LoggerImpl implements Logger {

     @Inject
     private LogHandler handler;

     @Override
     public void log(String s) {
         getHandler().writeLog(s);
     }

     public LogHandler getHandler() {
         return handler;
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_loghandler">LogHandler</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 public interface LogHandler {

     public String getName();

     public void writeLog(String s);
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_beans_xml">beans.xml</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-xml" data-lang="xml">&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>
 </div>
 <div class="sect1">
 <h2 id="_loggertest">LoggerTest</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;

 import javax.ejb.embeddable.EJBContainer;
 import javax.inject.Inject;
 import javax.naming.Context;

 import static junit.framework.Assert.assertNotNull;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;

 public class LoggerTest {

     @Inject
     Logger logger;

     private Context ctxt;

     @Before
     public void setUp() {
         try {
             ctxt = EJBContainer.createEJBContainer().getContext();
             ctxt.bind("inject", this);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     @After
     public void cleanUp() {
         try {
             ctxt.unbind("inject");
             ctxt.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     @Test
     public void testLogHandler() {
         assertNotNull(logger);
         assertFalse("Handler should not be a ConsoleHandler", logger.getHandler() instanceof ConsoleHandler);
         assertFalse("Handler should not be a FileHandler", logger.getHandler() instanceof FileHandler);
         assertTrue("Handler should be a DatabaseHandler", logger.getHandler() instanceof DatabaseHandler);
         logger.log("##### Testing write\n");
         logger = null;
     }

 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <h1 id="_executando" class="sect0">Executando</h1>
 <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.produces.disposes.LoggerTest
 Apache OpenEJB 4.0.0-beta-1    build: 20111002-04:06
 http://tomee.apache.org/
 INFO - openejb.home = /Users/dblevins/examples/cdi-produces-disposes
 INFO - openejb.base = /Users/dblevins/examples/cdi-produces-disposes
 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: /Users/dblevins/examples/cdi-produces-disposes/target/classes
 INFO - Beginning load: /Users/dblevins/examples/cdi-produces-disposes/target/classes
 INFO - Configuring enterprise application: /Users/dblevins/examples/cdi-produces-disposes
 INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
 INFO - Auto-creating a container for bean cdi-produces-disposes.Comp: Container(type=MANAGED, id=Default Managed Container)
 INFO - Enterprise application "/Users/dblevins/examples/cdi-produces-disposes" loaded.
 INFO - Assembling app: /Users/dblevins/examples/cdi-produces-disposes
 INFO - Jndi(name="java:global/cdi-produces-disposes/cdi-produces-disposes.Comp!org.apache.openejb.BeanContext$Comp")
 INFO - Jndi(name="java:global/cdi-produces-disposes/cdi-produces-disposes.Comp")
 INFO - Jndi(name="java:global/EjbModule10202458/org.superbiz.cdi.produces.disposes.LoggerTest!org.superbiz.cdi.produces.disposes.LoggerTest")
 INFO - Jndi(name="java:global/EjbModule10202458/org.superbiz.cdi.produces.disposes.LoggerTest")
 INFO - Created Ejb(deployment-id=cdi-produces-disposes.Comp, ejb-name=cdi-produces-disposes.Comp, container=Default Managed Container)
 INFO - Created Ejb(deployment-id=org.superbiz.cdi.produces.disposes.LoggerTest, ejb-name=org.superbiz.cdi.produces.disposes.LoggerTest, container=Default Managed Container)
 INFO - Started Ejb(deployment-id=cdi-produces-disposes.Comp, ejb-name=cdi-produces-disposes.Comp, container=Default Managed Container)
 INFO - Started Ejb(deployment-id=org.superbiz.cdi.produces.disposes.LoggerTest, ejb-name=org.superbiz.cdi.produces.disposes.LoggerTest, container=Default Managed Container)
 INFO - Deployed Application(path=/Users/dblevins/examples/cdi-produces-disposes)
 ##### Handler: @Produces created DatabaseHandler!, Writing to the database!
 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.02 sec

 Results :

 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
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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>CDI Produces Disposes</h1>
	</div>
	</div>
	</div>
	<div class="row">

	<div class="col-md-12">
	<div id="preamble">
	<div class="sectionbody">
	<div class="paragraph">
	<p>Esté exemplo demostra como as anotações @Produces e @Disposes trabalham. Um LogFactory cria uma instância do LogHandler
	dependendo de um atributo "type". Para o propósito deste exemplo, o type é hard-coded para especificar um valor.
	Uma implementação Logger deve conter uma lista de LogHandlers.</p>
	</div>
	<div class="literalblock">
	<div class="content">
	<pre>Teremos três implementações da interface LogHandler:</pre>
	</div>
	</div>
	<div class="ulist">
	<ul>
	<li>
	<p>Uma DatabaseHandler</p>
	</li>
	<li>
	<p>Uma FileHandler</p>
	</li>
	<li>
	<p>Uma ConsoleHandler</p>
	</li>
	</ul>
	</div>
	<div class="paragraph">
	<p>O DatabaseHandler aparentemente gravaria os logs em um banco de dados.</p>
	</div>
	<div class="paragraph">
	<p>O FileHandler gravaria os logs em um arquivo.</p>
	</div>
	<div class="paragraph">
	<p>O ConsoleHandler apenas imprimiria os logs para um console (saída padrão).</p>
	</div>
	<div class="paragraph">
	<p>Esté exemplo é apenas uma ilustração de como os conceitos dentro do CDI funcionam e não destina-se a fornecer uma implementação/design de um framework de log.</p>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_consolehandler">ConsoleHandler</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	public class ConsoleHandler implements LogHandler {

	private String name;

	public ConsoleHandler(String name) {
	this.name = name;
	}

	@Override
	public String getName() {
	return name;
	}

	@Override
	public void writeLog(String s) {
	System.out.printf("##### Handler: %s, Writing to the console!\n", getName());
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_databasehandler">DatabaseHandler</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	public class DatabaseHandler implements LogHandler {

	private String name;

	public DatabaseHandler(String name) {
	this.name = name;
	}

	@Override
	public String getName() {
	return name;
	}

	@Override
	public void writeLog(String s) {
	System.out.printf("##### Handler: %s, Writing to the database!\n", getName());
	// Use conexão para gravar log no banco de dados
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_filehandler">FileHandler</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	public class FileHandler implements LogHandler {

	private String name;

	public FileHandler(String name) {
	this.name = name;
	}

	@Override
	public String getName() {
	return name;
	}

	@Override
	public void writeLog(String s) {
	System.out.printf("##### Handler: %s, Writing to the file!\n", getName());
	// Escreva para o arquivo de log
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_logfactory">LogFactory</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	import javax.enterprise.inject.Disposes;
	import javax.enterprise.inject.Produces;

	public class LogFactory {

	private int type = 2;

	@Produces
	public LogHandler getLogHandler() {
	switch (type) {
	case 1:
	return new FileHandler("@Produces created FileHandler!");
	case 2:
	return new DatabaseHandler("@Produces created DatabaseHandler!");
	case 3:
	default:
	return new ConsoleHandler("@Produces created ConsoleHandler!");
	}
	}

	public void closeLogHandler(@Disposes LogHandler handler) {
	switch (type) {
	case 1:
	System.out.println("Closing File handler!");
	break;
	case 2:
	System.out.println("Closing DB handler!");
	break;
	case 3:
	default:
	System.out.println("Closing Console handler!");
	}
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_logger">Logger</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	public interface Logger {

	public void log(String s);

	public LogHandler getHandler();
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_loggerimpl">LoggerImpl</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	import javax.inject.Inject;
	import javax.inject.Named;

	@Named("logger")
	public class LoggerImpl implements Logger {

	@Inject
	private LogHandler handler;

	@Override
	public void log(String s) {
	getHandler().writeLog(s);
	}

	public LogHandler getHandler() {
	return handler;
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_loghandler">LogHandler</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	public interface LogHandler {

	public String getName();

	public void writeLog(String s);
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_beans_xml">beans.xml</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-xml" data-lang="xml"><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>
	</div>
	<div class="sect1">
	<h2 id="_loggertest">LoggerTest</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.cdi.produces.disposes;

	import org.junit.After;
	import org.junit.Before;
	import org.junit.Test;

	import javax.ejb.embeddable.EJBContainer;
	import javax.inject.Inject;
	import javax.naming.Context;

	import static junit.framework.Assert.assertNotNull;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;

	public class LoggerTest {

	@Inject
	Logger logger;

	private Context ctxt;

	@Before
	public void setUp() {
	try {
	ctxt = EJBContainer.createEJBContainer().getContext();
	ctxt.bind("inject", this);
	} catch (Exception e) {
	e.printStackTrace();
	}
	}

	@After
	public void cleanUp() {
	try {
	ctxt.unbind("inject");
	ctxt.close();
	} catch (Exception e) {
	e.printStackTrace();
	}
	}

	@Test
	public void testLogHandler() {
	assertNotNull(logger);
	assertFalse("Handler should not be a ConsoleHandler", logger.getHandler() instanceof ConsoleHandler);
	assertFalse("Handler should not be a FileHandler", logger.getHandler() instanceof FileHandler);
	assertTrue("Handler should be a DatabaseHandler", logger.getHandler() instanceof DatabaseHandler);
	logger.log("##### Testing write\n");
	logger = null;
	}

	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<h1 id="_executando" class="sect0">Executando</h1>
	<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.produces.disposes.LoggerTest
	Apache OpenEJB 4.0.0-beta-1 build: 20111002-04:06
	http://tomee.apache.org/
	INFO - openejb.home = /Users/dblevins/examples/cdi-produces-disposes
	INFO - openejb.base = /Users/dblevins/examples/cdi-produces-disposes
	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: /Users/dblevins/examples/cdi-produces-disposes/target/classes
	INFO - Beginning load: /Users/dblevins/examples/cdi-produces-disposes/target/classes
	INFO - Configuring enterprise application: /Users/dblevins/examples/cdi-produces-disposes
	INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
	INFO - Auto-creating a container for bean cdi-produces-disposes.Comp: Container(type=MANAGED, id=Default Managed Container)
	INFO - Enterprise application "/Users/dblevins/examples/cdi-produces-disposes" loaded.
	INFO - Assembling app: /Users/dblevins/examples/cdi-produces-disposes
	INFO - Jndi(name="java:global/cdi-produces-disposes/cdi-produces-disposes.Comp!org.apache.openejb.BeanContext$Comp")
	INFO - Jndi(name="java:global/cdi-produces-disposes/cdi-produces-disposes.Comp")
	INFO - Jndi(name="java:global/EjbModule10202458/org.superbiz.cdi.produces.disposes.LoggerTest!org.superbiz.cdi.produces.disposes.LoggerTest")
	INFO - Jndi(name="java:global/EjbModule10202458/org.superbiz.cdi.produces.disposes.LoggerTest")
	INFO - Created Ejb(deployment-id=cdi-produces-disposes.Comp, ejb-name=cdi-produces-disposes.Comp, container=Default Managed Container)
	INFO - Created Ejb(deployment-id=org.superbiz.cdi.produces.disposes.LoggerTest, ejb-name=org.superbiz.cdi.produces.disposes.LoggerTest, container=Default Managed Container)
	INFO - Started Ejb(deployment-id=cdi-produces-disposes.Comp, ejb-name=cdi-produces-disposes.Comp, container=Default Managed Container)
	INFO - Started Ejb(deployment-id=org.superbiz.cdi.produces.disposes.LoggerTest, ejb-name=org.superbiz.cdi.produces.disposes.LoggerTest, container=Default Managed Container)
	INFO - Deployed Application(path=/Users/dblevins/examples/cdi-produces-disposes)
	##### Handler: @Produces created DatabaseHandler!, Writing to the database!
	Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.02 sec

	Results :

	Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
	</div>
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