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| |
| <h1>Simple Stateless with callback methods</h1> |
| </div> |
| </div> |
| </div> |
| <div class="row"> |
| |
| <div class="col-md-12"> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This example shows how to create a stateless session bean that uses the |
| @PostConstruct, @PreDestroy and @AroundInvoke annotations.</p> |
| </div> |
| </div> |
| </div> |
| <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">package org.superbiz.stateless.basic; |
| |
| import jakarta.annotation.PostConstruct; |
| import jakarta.annotation.PreDestroy; |
| import jakarta.ejb.Stateless; |
| import jakarta.interceptor.AroundInvoke; |
| import jakarta.interceptor.InvocationContext; |
| |
| @Stateless |
| public class CalculatorBean { |
| |
| @PostConstruct |
| public void postConstruct() { |
| ExecutionChannel.getInstance().notifyObservers("postConstruct"); |
| } |
| |
| @PreDestroy |
| public void preDestroy() { |
| ExecutionChannel.getInstance().notifyObservers("preDestroy"); |
| } |
| |
| @AroundInvoke |
| public Object intercept(InvocationContext ctx) throws Exception { |
| ExecutionChannel.getInstance().notifyObservers(ctx.getMethod().getName()); |
| return ctx.proceed(); |
| } |
| |
| public int add(int a, int b) { |
| return a + b; |
| } |
| |
| public int subtract(int a, int b) { |
| return a - b; |
| } |
| |
| public int multiply(int a, int b) { |
| return a * b; |
| } |
| |
| public int divide(int a, int b) { |
| return a / b; |
| } |
| |
| public int remainder(int a, int b) { |
| return a % b; |
| } |
| |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_executionchannel">ExecutionChannel</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.counter; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ExecutionChannel { |
| private static final ExecutionChannel INSTANCE = new ExecutionChannel(); |
| |
| private final List<ExecutionObserver> observers = new ArrayList<ExecutionObserver>(); |
| |
| public static ExecutionChannel getInstance() { |
| return INSTANCE; |
| } |
| |
| public void addObserver(ExecutionObserver observer) { |
| this.observers.add(observer); |
| } |
| |
| public void notifyObservers(Object value) { |
| for (ExecutionObserver observer : this.observers) { |
| observer.onExecution(value); |
| } |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_executionobserver">ExecutionObserver</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.counter; |
| |
| public interface ExecutionObserver { |
| |
| void onExecution(Object value); |
| |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_calculatortest">CalculatorTest</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.stateless.basic; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import jakarta.ejb.embeddable.EJBContainer; |
| import javax.naming.Context; |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Properties; |
| |
| public class CalculatorTest implements ExecutionObserver { |
| private static final String JNDI = "java:global/simple-stateless-callbacks/CalculatorBean"; |
| |
| private List<Object> received = new ArrayList<Object>(); |
| |
| public Context getContext() throws NamingException { |
| final Properties p = new Properties(); |
| p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.core.LocalInitialContextFactory"); |
| return new InitialContext(p); |
| |
| } |
| |
| @Test |
| public void test() throws Exception { |
| ExecutionChannel.getInstance().addObserver(this); |
| |
| final EJBContainer container = EJBContainer.createEJBContainer(); |
| |
| { |
| final CalculatorBean calculator = (CalculatorBean) getContext().lookup(JNDI); |
| |
| Assert.assertEquals(10, calculator.add(4, 6)); |
| |
| //the bean is constructed only when it is used for the first time |
| Assert.assertEquals("postConstruct", this.received.remove(0)); |
| Assert.assertEquals("add", this.received.remove(0)); |
| |
| Assert.assertEquals(-2, calculator.subtract(4, 6)); |
| Assert.assertEquals("subtract", this.received.remove(0)); |
| |
| Assert.assertEquals(24, calculator.multiply(4, 6)); |
| Assert.assertEquals("multiply", this.received.remove(0)); |
| |
| Assert.assertEquals(2, calculator.divide(12, 6)); |
| Assert.assertEquals("divide", this.received.remove(0)); |
| |
| Assert.assertEquals(4, calculator.remainder(46, 6)); |
| Assert.assertEquals("remainder", this.received.remove(0)); |
| } |
| |
| { |
| final CalculatorBean calculator = (CalculatorBean) getContext().lookup(JNDI); |
| |
| Assert.assertEquals(10, calculator.add(4, 6)); |
| Assert.assertEquals("add", this.received.remove(0)); |
| |
| } |
| |
| container.close(); |
| Assert.assertEquals("preDestroy", this.received.remove(0)); |
| Assert.assertTrue(this.received.isEmpty()); |
| } |
| |
| @Override |
| public void onExecution(Object value) { |
| System.out.println("Test step -> " + value); |
| this.received.add(value); |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_running">Running</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-console" data-lang="console">------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running org.superbiz.stateless.basic.CalculatorTest |
| INFO - ******************************************************************************** |
| INFO - OpenEJB http://tomee.apache.org/ |
| INFO - Startup: Sat Jul 21 09:23:38 EDT 2012 |
| INFO - Copyright 1999-2012 (C) Apache OpenEJB Project, All Rights Reserved. |
| INFO - Version: 4.1.0 |
| INFO - Build date: 20120721 |
| INFO - Build time: 04:06 |
| INFO - ******************************************************************************** |
| INFO - openejb.home = /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks |
| INFO - openejb.base = /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks |
| INFO - Created new singletonService org.apache.openejb.cdi.ThreadSingletonServiceImpl@527736bd |
| INFO - Succeeded in installing singleton service |
| INFO - Using 'jakarta.ejb.embeddable.EJBContainer=true' |
| 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 - Beginning load: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks/target/classes |
| INFO - Configuring enterprise application: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks |
| INFO - Auto-deploying ejb CalculatorBean: EjbDeployment(deployment-id=CalculatorBean) |
| INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container) |
| INFO - Auto-creating a container for bean CalculatorBean: Container(type=STATELESS, id=Default Stateless Container) |
| INFO - Creating Container(id=Default Stateless Container) |
| INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container) |
| INFO - Auto-creating a container for bean org.superbiz.stateless.basic.CalculatorTest: 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 "/home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks" loaded. |
| INFO - Assembling app: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks |
| INFO - Jndi(name="java:global/simple-stateless-callbacks/CalculatorBean!org.superbiz.stateless.basic.CalculatorBean") |
| INFO - Jndi(name="java:global/simple-stateless-callbacks/CalculatorBean") |
| INFO - Existing thread singleton service in SystemInstance() org.apache.openejb.cdi.ThreadSingletonServiceImpl@527736bd |
| INFO - OpenWebBeans Container is starting... |
| INFO - Adding OpenWebBeansPlugin : [CdiPlugin] |
| INFO - All injection points are validated successfully. |
| INFO - OpenWebBeans Container has started, it took 111 ms. |
| INFO - Created Ejb(deployment-id=CalculatorBean, ejb-name=CalculatorBean, container=Default Stateless Container) |
| INFO - Started Ejb(deployment-id=CalculatorBean, ejb-name=CalculatorBean, container=Default Stateless Container) |
| INFO - Deployed Application(path=/home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks) |
| Test step -> postConstruct |
| Test step -> add |
| Test step -> subtract |
| Test step -> multiply |
| Test step -> divide |
| Test step -> remainder |
| Test step -> add |
| INFO - Undeploying app: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateless-callbacks |
| Test step -> preDestroy |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.884 sec |
| |
| Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_apis_used">APIs Used</h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/annotation/PostConstruct.html">jakarta.annotation.PostConstruct</a></p> |
| </li> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/annotation/PreDestroy.html">jakarta.annotation.PreDestroy</a></p> |
| </li> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/ejb/Stateless.html">jakarta.ejb.Stateless</a></p> |
| </li> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/ejb/embeddable/EJBContainer.html">jakarta.ejb.embeddable.EJBContainer</a></p> |
| </li> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/interceptor/AroundInvoke.html">jakarta.interceptor.AroundInvoke</a></p> |
| </li> |
| <li> |
| <p><a href="../../jakartaee-10.0/javadoc/jakarta/interceptor/InvocationContext.html">jakarta.interceptor.InvocationContext</a></p> |
| </li> |
| </ul> |
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