【问题标题】:Why is an InstantiationException being thrown when a JUnit test attempts to start Seam?为什么当 JUnit 测试尝试启动 Seam 时会抛出 InstantiationException?
【发布时间】:2013-01-01 02:21:05
【问题描述】:

我正在尝试为现有的 Java EE 应用程序编写集成测试,该应用程序使用 Seam 和 Hibernate 并部署到 Glassfish。

然而,测试目前未能在一开始就启动 Seam。这似乎是因为它无法实例化 Quartz Scheduler 组件 - 请参见下面的代码。异常堆栈跟踪也在下面。

任何帮助将不胜感激......

这些可能是不必要的细节,但我使用 JUnit(而不是 TestNG)编写了测试,如 here 所述。该测试扩展了 AbstractSeamT​​est 并具有实例化 ComponentTest 并覆盖 testComponents 的 @Test 方法,如here 所述。该应用程序在 Maven 的预集成阶段使用 Cargo 部署到现有的本地 Glassfish 实例,并使用 Failsafe 插件运行测试。

初始化Quartz类:

@Name("initialiseQuartz")
@Scope(ScopeType.APPLICATION)
@Startup
public class InitialiseQuartz {

    private QuartzTriggerHandle qth;

    @In(create=true) 
    private EmailService emailService;

    @Create
    public void startSchedule() {
        System.out.print("Schedule started");
        qth = emailService.generateDailyEmail("0 0 7 * * ?");
    }

    @Destroy
    public void stopSchedule() {
        try {
            qth.cancel();
        } catch (SchedulerException se) {

        }
    }
}

堆栈跟踪:

org.jboss.seam.InstantiationException: Could not instantiate Seam component: initialiseQuartz
    at org.jboss.seam.async.AbstractDispatcher.extractAndValidateParameters(AbstractDispatcher.java:171)
    at org.jboss.seam.async.AbstractDispatcher.createTimerSchedule(AbstractDispatcher.java:113)
    at org.jboss.seam.async.ThreadPoolDispatcher.scheduleInvocation(ThreadPoolDispatcher.java:56)
    at org.jboss.seam.async.ThreadPoolDispatcher.scheduleInvocation(ThreadPoolDispatcher.java:30)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
    at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
    at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
    at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
    at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
    at org.jboss.seam.async.ThreadPoolDispatcher_$$_javassist_seam_3.scheduleInvocation(ThreadPoolDispatcher_$$_javassist_seam_3.java)
    at org.jboss.seam.async.AsynchronousInterceptor.aroundInvoke(AsynchronousInterceptor.java:40)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
    at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
    at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
    at uk.police.kent.optica.schedule.EmailService_$$_javassist_seam_2.generateDailyEmail(EmailService_$$_javassist_seam_2.java)
    at uk.police.kent.optica.schedule.InitialiseQuartz.startSchedule(InitialiseQuartz.java:26)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
    at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
    at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
    at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
    at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
    at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
    at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
    at uk.police.kent.optica.schedule.InitialiseQuartz_$$_javassist_seam_1.startSchedule(InitialiseQuartz_$$_javassist_seam_1.java)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
    at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144)
    at org.jboss.seam.Component.callComponentMethod(Component.java:2275)
    at org.jboss.seam.Component.callCreateMethod(Component.java:2198)
    at org.jboss.seam.Component.newInstance(Component.java:2158)
    at org.jboss.seam.contexts.Contexts.startup(Contexts.java:304)
    at org.jboss.seam.contexts.Contexts.startup(Contexts.java:278)
    at org.jboss.seam.contexts.ServletLifecycle.endInitialization(ServletLifecycle.java:143)
    at org.jboss.seam.init.Initialization.init(Initialization.java:744)
    at org.jboss.seam.mock.AbstractSeamTest.startSeam(AbstractSeamTest.java:929)
    at com.ipl.rdhi.acceptance.RdhiAdapterIT.setUpBeforeClass(RdhiAdapterIT.java:118)

【问题讨论】:

    标签: jakarta-ee exception seam quartz-scheduler instantiation


    【解决方案1】:

    你用的是Witch Seam版本吗?

    当某些依赖项无法注入到您的组件中时,通常会发生此错误。 bean EmailService 在您的测试用例中以成功开始?

    【讨论】:

    • Seam 2.2 版。我认为这个问题是由于它无法启动 Seam 造成的,并且在各种论坛中查看似乎让 Seam 与嵌入式 JBoss 一起工作涉及很多痛苦。我注意到 Seam 2.3 文档已经放弃了 SeamT​​est,转而使用 Arquillian,但不幸的是,这不是我的选择,因为它是 Glassfish 2.1 版,而 Arquillian 仅支持 3.1。
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