Cómo detener las discusiones cuando anulación de la implementación de una aplicación Java EE?

Question

I undeploy mi aplicación Java EE que utiliza un registrador asíncrono que registra en su propio hilo de los Drools motor de reglas. Lo utilizo para registrar las decisiones del motor de reglas hace pero no puedo hacer que tenga impacto en el rendimiento, por lo que debe ejecutarse en su propio hilo.

me sale páginas de excepciones cuando se anula la implementación que indica que no se ha cerrado correctamente. Eso podría ser cierto, ya que el registrador es sólo un hilo como este:

while(true){ 
    log(something) 
    sleep(someTime); 
} 

Puede que no tenga tiempo para reaccionar adecuadamente cuando se está durmiendo y los undeploy aperturas. Lamentablemente, no puedo obtener el hilo del registrador, así que no puedo unirme a él en un método @PreDestroy. ¿Cómo puedo evitar las Excepciones cuando me desvinculo?

los Excpetions:

[#|2010-07-19T15:50:10.123+0200|WARNING|sun-appserver2.1|javax.enterprise.system.core.classloading|_ThreadID=24;_ThreadName=Thread-258;_RequestID=22a7d379-0813-4248-9095-3fba7f4cb95a;|LDR5206: EJBClassLoader EJBClassLoader : 
doneCalled = true 
doneSnapshot = EJBClassLoader.done() called ON EJBClassLoader : 
urlSet = [URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/jaxp-api-1.3.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/mvel2-2.0.10.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/activation-1.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/stax-1.2.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/jms-1.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-lang-2.4.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/joda-time-1.6.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/drools-compiler-5.0.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-email-1.2.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-beanutils-core-1.8.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/Mailforwarder-pojo-1.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/xml-apis-1.0.b2.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-logging-1.1.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/janino-2.5.15.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-digester-1.8.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/drools-api-5.0.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-net-2.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-lang-2.5.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/core-3.4.2.v_883_R34x.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/xpp3_min-1.1.4c.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/stax-api-1.0.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-configuration-1.6.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-collections-3.2.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/xstream-1.3.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/commons-beanutils-1.7.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/core-pojo-1.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/core-common-1.0.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/xml-writer-0.2.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/antlr-runtime-3.1.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/mail-1.4.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/activation.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/lib/drools-core-5.0.1.jar, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/applications/j2ee-apps/mailforwarder/Mailforwarder-ejbjar-1.0_jar/, URLEntry : file:/home/arne/env/runtime/glassfish/domains/domain1/generated/ejb/j2ee-apps/mailforwarder/] 
doneCalled = false 
Parent -> EJBClassLoader : 
urlSet = [] 
doneCalled = false 
Parent -> java.net.URLClassLoader@898540 


AT Mon Jul 19 15:47:21 CEST 2010 
BY :com.sun.enterprise.loader.EJBClassLoader.printStackTraceToString(EJBClassLoader.java:813) 
com.sun.enterprise.loader.EJBClassLoader.done(EJBClassLoader.java:173) 
com.sun.enterprise.server.AbstractLoader.done(AbstractLoader.java:355) 
com.sun.enterprise.server.ApplicationLoader.unload(ApplicationLoader.java:268) 
com.sun.enterprise.server.TomcatApplicationLoader.unload(TomcatApplicationLoader.java:218) 
com.sun.enterprise.server.ExtendedApplicationLoader.unload(ExtendedApplicationLoader.java:263) 
com.sun.enterprise.server.ApplicationManager.applicationUndeployed(ApplicationManager.java:525) 
com.sun.enterprise.server.ApplicationManager.applicationUndeployed(ApplicationManager.java:703) 
com.sun.enterprise.admin.event.AdminEventMulticaster.invokeApplicationDeployEventListener(AdminEventMulticaster.java:961) 
com.sun.enterprise.admin.event.AdminEventMulticaster.handleApplicationDeployEvent(AdminEventMulticaster.java:943) 
com.sun.enterprise.admin.event.AdminEventMulticaster.processEvent(AdminEventMulticaster.java:467) 
com.sun.enterprise.admin.event.AdminEventMulticaster.multicastEvent(AdminEventMulticaster.java:182) 
com.sun.enterprise.admin.server.core.DeploymentNotificationHelper.multicastEvent(DeploymentNotificationHelper.java:308) 
com.sun.enterprise.deployment.phasing.DeploymentServiceUtils.multicastEvent(DeploymentServiceUtils.java:231) 
com.sun.enterprise.deployment.phasing.ServerDeploymentTarget.sendStopEvent(ServerDeploymentTarget.java:332) 
com.sun.enterprise.deployment.phasing.ApplicationStopPhase.runPhase(ApplicationStopPhase.java:136) 
com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:108) 
com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:966) 
com.sun.enterprise.deployment.phasing.PEDeploymentService.undeploy(PEDeploymentService.java:333) 
com.sun.enterprise.deployment.phasing.PEDeploymentService.undeploy(PEDeploymentService.java:308) 
com.sun.enterprise.admin.mbeans.ApplicationsConfigMBean.undeploy(ApplicationsConfigMBean.java:667) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
java.lang.reflect.Method.invoke(Method.java:597) 
com.sun.enterprise.admin.MBeanHelper.invokeOperationInBean(MBeanHelper.java:390) 
com.sun.enterprise.admin.MBeanHelper.invokeOperationInBean(MBeanHelper.java:373) 
com.sun.enterprise.admin.config.BaseConfigMBean.invoke(BaseConfigMBean.java:477) 
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836) 
com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761) 
sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
java.lang.reflect.Method.invoke(Method.java:597) 
com.sun.enterprise.admin.util.proxy.ProxyClass.invoke(ProxyClass.java:90) 
$Proxy1.invoke(Unknown Source) 
com.sun.enterprise.admin.server.core.jmx.SunoneInterceptor.invoke(SunoneInterceptor.java:304) 
com.sun.enterprise.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:170) 
com.sun.enterprise.deployment.autodeploy.AutoDeployer.invokeUndeploymentService(AutoDeployer.java:903) 
com.sun.enterprise.deployment.autodeploy.AutoDeployer.undeployJavaEEArchive(AutoDeployer.java:399) 
com.sun.enterprise.deployment.autodeploy.AutoDeployer.undeployApplication(AutoDeployer.java:381) 
com.sun.enterprise.deployment.autodeploy.AutoDeployer.undeployAll(AutoDeployer.java:315) 
com.sun.enterprise.deployment.autodeploy.AutoDeployControllerImpl$AutoDeployTask.run(AutoDeployControllerImpl.java:375) 
java.util.TimerThread.mainLoop(Timer.java:512) 
java.util.TimerThread.run(Timer.java:462) 
Parent -> EJBClassLoader : 
urlSet = [] 
doneCalled = false 
Parent -> java.net.URLClassLoader@898540 

was requested to find resource META-INF/services/javax.xml.datatype.DatatypeFactory after done was invoked from the following stack trace 
java.lang.Throwable 
     at com.sun.enterprise.loader.EJBClassLoader.findResource(EJBClassLoader.java:459) 
     at java.lang.ClassLoader.getResource(ClassLoader.java:978) 
     at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1168) 
     at com.sun.enterprise.loader.EJBClassLoader.getResourceAsStream(EJBClassLoader.java:796) 
     at javax.xml.datatype.SecuritySupport$4.run(SecuritySupport.java:92) 
     at java.security.AccessController.doPrivileged(Native Method) 
     at javax.xml.datatype.SecuritySupport.getResourceAsStream(SecuritySupport.java:85) 
     at javax.xml.datatype.FactoryFinder.findJarServiceProvider(FactoryFinder.java:250) 
     at javax.xml.datatype.FactoryFinder.find(FactoryFinder.java:223) 
     at javax.xml.datatype.DatatypeFactory.newInstance(DatatypeFactory.java:131) 
     at com.thoughtworks.xstream.converters.extended.DurationConverter.<init>(DurationConverter.java:33) 
     at sun.reflect.GeneratedConstructorAccessor70.newInstance(Unknown Source) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
     at com.thoughtworks.xstream.XStream.dynamicallyRegisterConverter(XStream.java:725) 
     at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:696) 
     at com.thoughtworks.xstream.XStream.<init>(XStream.java:445) 
     at com.thoughtworks.xstream.XStream.<init>(XStream.java:385) 
     at com.thoughtworks.xstream.XStream.<init>(XStream.java:323) 
     at org.drools.audit.WorkingMemoryFileLogger.writeToDisk(WorkingMemoryFileLogger.java:120) 
     at org.drools.audit.ThreadedWorkingMemoryFileLogger.writeToDisk(ThreadedWorkingMemoryFileLogger.java:38) 
     at org.drools.audit.ThreadedWorkingMemoryFileLogger$Writer.run(ThreadedWorkingMemoryFileLogger.java:50) 
     at java.lang.Thread.run(Thread.java:619) 
|#] 

---

no lo suficientemente claro lo que quería en esta pregunta, lo siento por eso. Le pedí a un nuevo question here

Answer 1

Bastante uso ScheduledExecutorService#scheduleAtFixedRate() en lugar de la antigua Thread#sleep(). Puede utilizar ServletContextListener de ejecutarlo en el inicio de la aplicación web y evitar que al cerrar el sistema de aplicación web.

@WebListener 
public class Config implements ServletContextListener { 

    private ScheduledExecutorService scheduler; 

    @Override 
    public void contextInitialized(ServletContextEvent event) { 
     scheduler = Executors.newSingleThreadScheduledExecutor(); 
     scheduler.scheduleAtFixedRate(new Task(), 0, 1, TimeUnit.MINUTES); // Schedule to run every minute. 
    } 

    @Override 
    public void contextDestroyed(ServletContextEvent event) { 
     scheduler.shutdown(); // Important! This stops the thread. 
    } 

} 

Dónde Task puede tener este aspecto:

public class Task implements Runnable { 

    @Override 
    public void run() { 
     log(something); 
    } 

} 

Si el entorno no es compatible con Servlet 3.0 @WebListener, a continuación, registrarlo como sigue en web.xml a conseguir que se ejecute:

<listener> 
    <listener-class>com.example.Config</listener-class> 
</listener>