Como interromper threads ao remover a implantação de um aplicativo Java EE?[duplicado]
-
27-09-2020 - |
Pergunta
Eu desimplanto meu aplicativo Java EE que usa um criador de logs assíncrono que efetua login em seu próprio thread a partir do mecanismo de regras Drools.Eu o uso para registrar decisões tomadas pelo mecanismo de regras, mas não posso permitir que isso tenha impacto no rendimento, portanto, ele deve ser executado em seu próprio thread.
Recebo páginas de exceções quando cancelo a implantação, indicando que não foi fechado corretamente.Isso pode ser verdade, já que o logger é apenas um tópico como este:
while(true){
log(something)
sleep(someTime);
}
Ele pode não ter tempo para reagir adequadamente quando estiver dormindo e a remoção de implantação for iniciada.Infelizmente não consigo obter o thread do logger, então não posso ingressar nele em um método @PreDestroy.Como posso evitar as exceções ao cancelar a implantação?
as exceções:
[#|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)
|#]
Não deixei claro o suficiente o que queria nesta pergunta, desculpe por isso.Eu perguntei um novo pergunta aqui
Solução
Em vez disso, use ScheduledExecutorService#scheduleAtFixedRate()
em vez do antiquado Thread#sleep()
.Você pode usar ServletContextListener
para executá-lo na inicialização do webapp e interrompê-lo no desligamento do webapp.
@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.
}
}
Onde Task
pode ficar assim:
public class Task implements Runnable {
@Override
public void run() {
log(something);
}
}
Se o seu ambiente não suportar Servlet 3.0 @WebListener
, registre-o da seguinte maneira em web.xml
para fazê-lo funcionar:
<listener>
<listener-class>com.example.Config</listener-class>
</listener>