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| <h1>Simple Stateful with callback methods</h1> |
| </div> |
| </div> |
| </div> |
| <div class="row"> |
| |
| <div class="col-md-12"> |
| <p>This example shows how to create a stateful session bean that uses the @PrePassivate, @PostActivate, @PostConstruct, @PreDestroy and @AroundInvoke annotations.</p> |
| <h2>CallbackCounter</h2> |
| <pre><code>package org.superbiz.counter; |
| |
| import javax.annotation.PostConstruct; |
| import javax.annotation.PreDestroy; |
| import javax.ejb.PostActivate; |
| import javax.ejb.PrePassivate; |
| import javax.ejb.Stateful; |
| import javax.ejb.StatefulTimeout; |
| import javax.interceptor.AroundInvoke; |
| import javax.interceptor.InvocationContext; |
| import java.io.Serializable; |
| import java.util.concurrent.TimeUnit; |
| |
| @Stateful |
| @StatefulTimeout(value = 1, unit = TimeUnit.SECONDS) |
| public class CallbackCounter implements Serializable { |
| |
| private int count = 0; |
| |
| @PrePassivate |
| public void prePassivate() { |
| ExecutionChannel.getInstance().notifyObservers("prePassivate"); |
| } |
| |
| @PostActivate |
| public void postActivate() { |
| ExecutionChannel.getInstance().notifyObservers("postActivate"); |
| } |
| |
| @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 count() { |
| return count; |
| } |
| |
| public int increment() { |
| return ++count; |
| } |
| |
| public int reset() { |
| return (count = 0); |
| } |
| } |
| </code></pre> |
| <h2>ExecutionChannel</h2> |
| <pre><code>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> |
| <h2>ExecutionObserver</h2> |
| <pre><code>package org.superbiz.counter; |
| |
| public interface ExecutionObserver { |
| |
| void onExecution(Object value); |
| |
| } |
| </code></pre> |
| <h2>CounterCallbacksTest</h2> |
| <pre><code>package org.superbiz.counter; |
| |
| import junit.framework.Assert; |
| import org.junit.Test; |
| |
| import javax.ejb.embeddable.EJBContainer; |
| import javax.naming.Context; |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| import java.util.*; |
| |
| public class CounterCallbacksTest implements ExecutionObserver { |
| private static 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 { |
| final Map<String, Object> p = new HashMap<String, Object>(); |
| p.put("MySTATEFUL", "new://Container?type=STATEFUL"); |
| p.put("MySTATEFUL.Capacity", "2"); //How many instances of Stateful beans can our server hold in memory? |
| p.put("MySTATEFUL.Frequency", "1"); //Interval in seconds between checks |
| p.put("MySTATEFUL.BulkPassivate", "0"); //No bulkPassivate - just passivate entities whenever it is needed |
| final EJBContainer container = EJBContainer.createEJBContainer(p); |
| |
| //this is going to track the execution |
| ExecutionChannel.getInstance().addObserver(this); |
| |
| { |
| final Context context = getContext(); |
| |
| CallbackCounter counterA = (CallbackCounter) context.lookup("java:global/simple-stateful-callbacks/CallbackCounter"); |
| Assert.assertNotNull(counterA); |
| Assert.assertEquals("postConstruct", received.remove(0)); |
| |
| Assert.assertEquals(0, counterA.count()); |
| Assert.assertEquals("count", received.remove(0)); |
| |
| Assert.assertEquals(1, counterA.increment()); |
| Assert.assertEquals("increment", received.remove(0)); |
| |
| Assert.assertEquals(0, counterA.reset()); |
| Assert.assertEquals("reset", received.remove(0)); |
| |
| Assert.assertEquals(1, counterA.increment()); |
| Assert.assertEquals("increment", received.remove(0)); |
| |
| System.out.println("Waiting 2 seconds..."); |
| Thread.sleep(2000); |
| |
| Assert.assertEquals("preDestroy", received.remove(0)); |
| |
| try { |
| counterA.increment(); |
| Assert.fail("The ejb is not supposed to be there."); |
| } catch (javax.ejb.NoSuchEJBException e) { |
| //excepted |
| } |
| |
| context.close(); |
| } |
| |
| { |
| final Context context = getContext(); |
| |
| CallbackCounter counterA = (CallbackCounter) context.lookup("java:global/simple-stateful-callbacks/CallbackCounter"); |
| Assert.assertEquals("postConstruct", received.remove(0)); |
| |
| Assert.assertEquals(1, counterA.increment()); |
| Assert.assertEquals("increment", received.remove(0)); |
| |
| ((CallbackCounter) context.lookup("java:global/simple-stateful-callbacks/CallbackCounter")).count(); |
| Assert.assertEquals("postConstruct", received.remove(0)); |
| Assert.assertEquals("count", received.remove(0)); |
| |
| ((CallbackCounter) context.lookup("java:global/simple-stateful-callbacks/CallbackCounter")).count(); |
| Assert.assertEquals("postConstruct", received.remove(0)); |
| Assert.assertEquals("count", received.remove(0)); |
| |
| System.out.println("Waiting 2 seconds..."); |
| Thread.sleep(2000); |
| Assert.assertEquals("prePassivate", received.remove(0)); |
| |
| context.close(); |
| } |
| container.close(); |
| |
| Assert.assertEquals("preDestroy", received.remove(0)); |
| Assert.assertEquals("preDestroy", received.remove(0)); |
| |
| Assert.assertTrue(received.toString(), received.isEmpty()); |
| } |
| |
| @Override |
| public void onExecution(Object value) { |
| System.out.println("Test step -> " + value); |
| received.add(value); |
| } |
| } |
| </code></pre> |
| <h1>Running</h1> |
| <pre><code>------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running org.superbiz.counter.CounterCallbacksTest |
| INFO - ******************************************************************************** |
| INFO - OpenEJB http://tomee.apache.org/ |
| INFO - Startup: Sat Jul 21 08:18:28 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-stateful-callbacks |
| INFO - openejb.base = /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks |
| INFO - Created new singletonService org.apache.openejb.cdi.ThreadSingletonServiceImpl@527736bd |
| INFO - Succeeded in installing singleton service |
| INFO - Using 'javax.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 - Configuring Service(id=MySTATEFUL, type=Container, provider-id=Default Stateful Container) |
| INFO - Creating TransactionManager(id=Default Transaction Manager) |
| INFO - Creating SecurityService(id=Default Security Service) |
| INFO - Creating Container(id=MySTATEFUL) |
| INFO - Using directory /tmp for stateful session passivation |
| INFO - Beginning load: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks/target/classes |
| INFO - Configuring enterprise application: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks |
| INFO - Auto-deploying ejb CallbackCounter: EjbDeployment(deployment-id=CallbackCounter) |
| INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container) |
| INFO - Auto-creating a container for bean org.superbiz.counter.CounterCallbacksTest: 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-stateful-callbacks" loaded. |
| INFO - Assembling app: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks |
| INFO - Jndi(name="java:global/simple-stateful-callbacks/CallbackCounter!org.superbiz.counter.CallbackCounter") |
| INFO - Jndi(name="java:global/simple-stateful-callbacks/CallbackCounter") |
| 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 225 ms. |
| INFO - Created Ejb(deployment-id=CallbackCounter, ejb-name=CallbackCounter, container=MySTATEFUL) |
| INFO - Started Ejb(deployment-id=CallbackCounter, ejb-name=CallbackCounter, container=MySTATEFUL) |
| INFO - Deployed Application(path=/home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks) |
| Test step -> postConstruct |
| Test step -> count |
| Test step -> increment |
| Test step -> reset |
| Test step -> increment |
| Waiting 2 seconds... |
| Test step -> preDestroy |
| INFO - Removing the timed-out stateful session bean instance 583c10bfdbd326ba:57f94a9b:138a9798adf:-8000 |
| INFO - Activation failed: file not found /tmp/583c10bfdbd326ba=57f94a9b=138a9798adf=-8000 |
| Test step -> postConstruct |
| Test step -> increment |
| Test step -> postConstruct |
| Test step -> count |
| Test step -> postConstruct |
| Test step -> count |
| Waiting 2 seconds... |
| Test step -> prePassivate |
| INFO - Passivating to file /tmp/583c10bfdbd326ba=57f94a9b=138a9798adf=-7fff |
| Test step -> preDestroy |
| INFO - Removing the timed-out stateful session bean instance 583c10bfdbd326ba:57f94a9b:138a9798adf:-7ffe |
| Test step -> preDestroy |
| INFO - Removing the timed-out stateful session bean instance 583c10bfdbd326ba:57f94a9b:138a9798adf:-7ffd |
| INFO - Undeploying app: /home/boto/dev/ws/openejb_trunk/openejb/examples/simple-stateful-callbacks |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 7.487 sec |
| |
| Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 |
| |
| [INFO] ------------------------------------------------------------------------ |
| [INFO] BUILD SUCCESS |
| [INFO] ------------------------------------------------------------------------ |
| [INFO] Total time: 15.803s |
| [INFO] Finished at: Sat Jul 21 08:18:35 EDT 2012 |
| [INFO] Final Memory: 11M/247M |
| [INFO] ------------------------------------------------------------------------ |
| </code></pre> |
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