JSF2支持Bean無法獲得對@注入會話Bean的引用

我有以下JSF2控制器/ bb，我注入了一個會話bean。但是，它無法獲得對EJB本地會話Bean的引用。JSF2支持Bean無法獲得對@注入會話Bean的引用

JSF2輔助Bean：

@ManagedBean 
@Named("scorecardBackingBean") 
@SessionScoped 
public class ScorecardBackingBean implements Serializable { 
    private static final long serialVersionUID = 7231502115861150753L; 

    @Inject 
    private IScorecardServiceBean scorecardServiceBean; 

    @PostConstruct 
    private void prepareMainLineChart() { 
     this.mainLineChart = new CartesianChartModel(); 


     List<OrderVolume> orderVolumeList = this.scorecardServiceBean 
     .getOrderVolume(); //ERROR here, scorecardServiceBean is null. 
}

EJB：

@Stateless 
public class ScorecardServiceBean implements IScorecardServiceBean { 
}

EJB接口：

@Local 
public interface IScorecardServiceBean { 
    List<OrderVolume> getOrderVolume(); 
}

遇到的錯誤：

java.lang.IllegalStateException: JBAS011048: Failed to construct component instance 
    at org.jboss.as.ee.component.BasicComponent.constructComponentInstance(BasicComponent.java:163) 
    at org.jboss.as.ee.component.BasicComponent.createInstance(BasicComponent.java:95) 
    at org.jboss.as.web.deployment.component.WebComponentInstantiator$2.<init>(WebComponentInstantiator.java:96) 
    at org.jboss.as.web.deployment.component.WebComponentInstantiator.initializeInstance(WebComponentInstantiator.java:94) 
................. 
Caused by: java.lang.NullPointerException 
    at sg.java.bus.controller.scorecard.ScorecardBackingBean.prepareMainLineChart(ScorecardBackingBean.java:79) 
    at sg.java.bus.controller.scorecard.ScorecardBackingBean.init(ScorecardBackingBean.java:61) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.jboss.as.ee.component.ManagedReferenceLifecycleMethodInterceptorFactory$ManagedReferenceLifecycleMethodInterceptor.processInvocation(ManagedReferenceLifecycleMethodInterceptorFactory.java:130) 
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) 
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) 
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) 
    at org.jboss.as.ee.component.ManagedReferenceInterceptorFactory$ManagedReferenceInterceptor.processInvocation(ManagedReferenceInterceptorFactory.java:106) 
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) 
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) 
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) 
    at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) 
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) 
    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) 
    at org.jboss.as.ee.component.BasicComponent.constructComponentInstance(BasicComponent.java:161) 
    ... 52 more

來源

2012-07-23 Oh Chin Boon