Java EE uygulamasının ayrıştırılmasında iş parçacığı nasıl durdurulur?

Question

Kendi iş parçacığı içinde Drools kuralları altyapısından oturum açan bir zaman uyumsuz günlükçük kullanan Java EE uygulamasından vazgeçiyorum. Kurallar motorun aldığı kararları günlüğe dökmek için kullanıyorum ama verim üzerinde etkisi olmasına izin veremem, bu yüzden kendi iş parçasında çalışmalıdır.

Düzgün olmayan bir şekilde kapatıldığını belirten kaldırıldığımda İstisna sayfalarını alıyorum. O uyku ve undeploy başlar durumdayken düzgün tepki zamanınız olmayabilir

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

: logger böyle bir iş parçacığı olduğundan Doğru olabilir. Ne yazık ki, iş parçacığının kendisini günlüğe kaydediciden alamıyorum, dolayısıyla bir @PreDestroy yönteminde buna katlanamıyorum. Ayrıldığımda İstisnaları nasıl önleyebilirim?

Excpetions: Bunun için üzgünüm bu soruya, ne istediğini ben yeterince açık sergiledi

[#|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) 
|#] 

---

. question here

Answer 1

Yeni ScheduledExecutorService#scheduleAtFixedRate()'u eski moda Thread#sleep() yerine kullanın. Webapp'un başlangıcında çalıştırmak için ServletContextListener'u kullanabilir ve webapp'ın kapatılmasını durdurabilirsiniz. Task şöyle olabilir

@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. 
    } 

} 

:

public class Task implements Runnable { 

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

} 

ortamınızı desteklemiyorsa yayınlanmaya almak için web.xml aşağıdaki şekilde Servlet 3.0 @WebListener, sonra kaydedin:

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