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| <h1>Mbean Auto Registration</h1> |
| </div> |
| </div> |
| </div> |
| <div class="row"> |
| |
| <div class="col-md-12"> |
| <p>This example shows how to automatically create and register mbeans using TomEE features.</p> |
| <h1>Dependencies</h1> |
| <p>To be able to use it you need to import the mbean api (annotations):</p> |
| <pre><code><dependency> |
| <groupId>org.apache.openejb</groupId> |
| <artifactId>mbean-annotation-api</artifactId> |
| <version>4.5.0</version> |
| <scope>provided</scope> |
| </dependency> |
| </code></pre> |
| <h1>The MBean</h1> |
| <p>The mbean implements a simple game where the goal is to guess a number.</p> |
| <p>It allows the user to change the value too.</p> |
| <pre><code>package org.superbiz.mbean; |
| |
| import javax.management.Description; |
| import javax.management.MBean; |
| import javax.management.ManagedAttribute; |
| import javax.management.ManagedOperation; |
| |
| @MBean |
| @Description("play with me to guess a number") |
| public class GuessHowManyMBean { |
| private int value = 0; |
| |
| @ManagedAttribute |
| @Description("you are cheating!") |
| public int getValue() { |
| return value; |
| } |
| |
| @ManagedAttribute |
| public void setValue(int value) { |
| this.value = value; |
| } |
| |
| @ManagedOperation |
| public String tryValue(int userValue) { |
| if (userValue == value) { |
| return "winner"; |
| } |
| return "not the correct value, please have another try"; |
| } |
| } |
| </code></pre> |
| <p>To register a MBean you simply have to specify a property either in system.properties, or in intial context properties.</p> |
| <pre><code>Properties properties = new Properties(); |
| properties.setProperty("openejb.user.mbeans.list", GuessHowManyMBean.class.getName()); |
| EJBContainer.createEJBContainer(properties); |
| </code></pre> |
| <h1>Accessing the MBean</h1> |
| <p>Then simply get the platform server and you can play with parameters and operations:</p> |
| <pre><code>package org.superbiz.mbean; |
| |
| import org.junit.Test; |
| |
| import javax.ejb.embeddable.EJBContainer; |
| import javax.management.Attribute; |
| import javax.management.MBeanInfo; |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| import java.lang.management.ManagementFactory; |
| import java.util.Properties; |
| |
| import static junit.framework.Assert.assertEquals; |
| |
| public class GuessHowManyMBeanTest { |
| private static final String OBJECT_NAME = "openejb.user.mbeans:group=org.superbiz.mbean,application=mbean-auto-registration,name=GuessHowManyMBean"; |
| |
| @Test |
| public void play() throws Exception { |
| Properties properties = new Properties(); |
| properties.setProperty("openejb.user.mbeans.list", GuessHowManyMBean.class.getName()); |
| EJBContainer container = EJBContainer.createEJBContainer(properties); |
| |
| MBeanServer server = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName objectName = new ObjectName(OBJECT_NAME); |
| MBeanInfo infos = server.getMBeanInfo(objectName); |
| assertEquals(0, server.getAttribute(objectName, "value")); |
| server.setAttribute(objectName, new Attribute("value", 3)); |
| assertEquals(3, server.getAttribute(objectName, "value")); |
| assertEquals("winner", server.invoke(objectName, "tryValue", new Object[]{3}, null)); |
| assertEquals("not the correct value, please have another try", server.invoke(objectName, "tryValue", new Object[]{2}, null)); |
| |
| container.close(); |
| } |
| } |
| </code></pre> |
| <h4>Note</h4> |
| <p>If OpenEJB can't find any module it can't start. So to force him to start even if the example has only the mbean as java class, we added a <code>beans.xml</code> file to turn our project into a Java EE module.</p> |
| <h1>Running</h1> |
| <pre><code>------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running org.superbiz.mbean.GuessHowManyMBeanTest |
| Apache OpenEJB 4.0.0-beta-1 build: 20111002-04:06 |
| http://tomee.apache.org/ |
| INFO - openejb.home = /Users/dblevins/examples/mbean-auto-registration |
| INFO - openejb.base = /Users/dblevins/examples/mbean-auto-registration |
| 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/mbean-auto-registration/target/classes |
| INFO - Beginning load: /Users/dblevins/examples/mbean-auto-registration/target/classes |
| INFO - Configuring enterprise application: /Users/dblevins/examples/mbean-auto-registration |
| INFO - MBean openejb.user.mbeans:application=,group=org.superbiz.mbean,name=GuessHowManyMBean registered. |
| INFO - MBean openejb.user.mbeans:application=mbean-auto-registration,group=org.superbiz.mbean,name=GuessHowManyMBean registered. |
| INFO - MBean openejb.user.mbeans:application=EjbModule1847652919,group=org.superbiz.mbean,name=GuessHowManyMBean registered. |
| INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container) |
| INFO - Auto-creating a container for bean mbean-auto-registration.Comp: Container(type=MANAGED, id=Default Managed Container) |
| INFO - Enterprise application "/Users/dblevins/examples/mbean-auto-registration" loaded. |
| INFO - Assembling app: /Users/dblevins/examples/mbean-auto-registration |
| INFO - Jndi(name="java:global/mbean-auto-registration/mbean-auto-registration.Comp!org.apache.openejb.BeanContext$Comp") |
| INFO - Jndi(name="java:global/mbean-auto-registration/mbean-auto-registration.Comp") |
| INFO - Jndi(name="java:global/EjbModule1847652919/org.superbiz.mbean.GuessHowManyMBeanTest!org.superbiz.mbean.GuessHowManyMBeanTest") |
| INFO - Jndi(name="java:global/EjbModule1847652919/org.superbiz.mbean.GuessHowManyMBeanTest") |
| INFO - Created Ejb(deployment-id=mbean-auto-registration.Comp, ejb-name=mbean-auto-registration.Comp, container=Default Managed Container) |
| INFO - Created Ejb(deployment-id=org.superbiz.mbean.GuessHowManyMBeanTest, ejb-name=org.superbiz.mbean.GuessHowManyMBeanTest, container=Default Managed Container) |
| INFO - Started Ejb(deployment-id=mbean-auto-registration.Comp, ejb-name=mbean-auto-registration.Comp, container=Default Managed Container) |
| INFO - Started Ejb(deployment-id=org.superbiz.mbean.GuessHowManyMBeanTest, ejb-name=org.superbiz.mbean.GuessHowManyMBeanTest, container=Default Managed Container) |
| INFO - Deployed Application(path=/Users/dblevins/examples/mbean-auto-registration) |
| INFO - Undeploying app: /Users/dblevins/examples/mbean-auto-registration |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.063 sec |
| |
| Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 |
| </code></pre> |
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