Làm thế nào để dừng các luồng khi không triển khai ứng dụng Java EE?

Question

Tôi không triển khai ứng dụng Java EE của mình sử dụng trình ghi nhật ký không đồng bộ ghi nhật ký theo chủ đề riêng của nó từ công cụ quy tắc Drools. Tôi sử dụng nó để đăng nhập các quyết định mà công cụ quy tắc tạo ra nhưng tôi không thể để nó có tác động đến thông lượng, do đó nó phải chạy theo chủ đề riêng của nó.

Tôi nhận được các trang Ngoại lệ khi tôi không khai báo nó khi nó không được đóng đúng cách. Điều đó có thể đúng vì trình ghi nhật ký chỉ là một chủ đề như thế này:

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

Nó có thể không có thời gian để phản ứng đúng khi ngủ và bắt đầu không khởi động. Thật không may là tôi không thể lấy chính chuỗi đó từ trình ghi nhật ký, vì vậy tôi không thể tham gia vào nó bằng phương thức @PreDestroy. Làm cách nào để tránh các ngoại lệ khi tôi không khai báo?

các 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) 
|#] 

---

Tôi không làm đủ rõ ràng những gì tôi muốn trong câu hỏi này, xin lỗi vì điều đó. Tôi đã hỏi một số mới question here

Answer 1

Thay vì sử dụng ScheduledExecutorService#scheduleAtFixedRate() thay vì cũ Thread#sleep(). Bạn có thể sử dụng ServletContextListener để chạy nó trên khởi động webapp và dừng nó trên tắt webapp của.

@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. 
    } 

} 

đâu Task có thể trông như thế này:

public class Task implements Runnable { 

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

} 

Nếu môi trường của bạn không hỗ trợ Servlet 3.0 @WebListener, sau đó đăng ký nó như sau trong web.xml để làm cho nó chạy:

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