澤西島：注入工作在資源方法中，但不適用於EJB屬性

Question

我有一個自定義的InjectionProvider，可以從SecurityContext檢索User對象並使它可用。 定制的ResourceFilter執行HTTP基本身份驗證，創建SecurityContext並使用Principal進行填充。 基於此建議 。

當我從資源方法訪問它時，它按預期工作：

@Stateless
@Path("foo")
public class FooResource {

  @GET
  @ResourceFilters(value = {UserAuthenticationFilter.class})
  public Response get(@Context User user) {
    return Response.ok().entity(user).build();
  }
}

但是，當我嘗試將對象作為EJB的屬性/字段注入時，會拋出異常， 即使我在日志中看到調用了InjectionProvider的情況也是如此：

@Stateless
@Path("foo")
public class FooResource {

  @Context
  private User user;

  @GET
  @ResourceFilters(value = {UserAuthenticationFilter.class})
  public Response get() {
    return Response.ok().entity(user).build();
  }
}

異常很奇怪：

[#|2011-10-31T13:35:47.691+0000|WARNING|glassfish3.1.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=18;_ThreadName=Thread-3;|StandardWrapperValve[Gateway Servlet]: PWC1406: Servlet.service() for servlet Gateway Servlet threw exception
javax.ejb.CreateException: Could not create stateless EJB
    at com.sun.ejb.containers.StatelessSessionContainer.createStatelessEJB(StatelessSessionContainer.java:534)
    at com.sun.ejb.containers.StatelessSessionContainer.access$000(StatelessSessionContainer.java:95)
    at com.sun.ejb.containers.StatelessSessionContainer$SessionContextFactory.create(StatelessSessionContainer.java:724)
    at com.sun.ejb.containers.util.pool.NonBlockingPool.getObject(NonBlockingPool.java:247)
    at com.sun.ejb.containers.StatelessSessionContainer._getContext(StatelessSessionContainer.java:449)
    at com.sun.ejb.containers.BaseContainer.getContext(BaseContainer.java:2528)
    at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1895)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
    at $Proxy166.get(Unknown Source)
....
Caused by: com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
    at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
    at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
    at com.sun.jersey.server.impl.application.WebApplicationImpl$ComponentProcessorFactoryImpl.get(WebApplicationImpl.java:499)
    at com.sun.jersey.server.impl.ejb.EJBInjectionInterceptor.get(EJBInjectionInterceptor.java:104)
    at com.sun.jersey.server.impl.ejb.EJBInjectionInterceptor.init(EJBInjectionInterceptor.java:71)
    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 com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCallback(SystemInterceptorProxy.java:133)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.init(SystemInterceptorProxy.java:120)
    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 com.sun.ejb.containers.interceptors.CallbackInterceptor.intercept(InterceptorManager.java:964)
    at com.sun.ejb.containers.interceptors.CallbackChainImpl.invokeNext(CallbackChainImpl.java:65)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:393)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:376)
    at com.sun.ejb.containers.StatelessSessionContainer.createStatelessEJB(StatelessSessionContainer.java:526)
    ... 55 more

我究竟做錯了什么？

編輯 ：我只是注意到，在引發異常之前，server.log中報告了一個錯誤：

[#|2011-10-31T15:33:01.854+0000|SEVERE|glassfish3.1.1|com.sun.jersey.spi.inject.Errors|_ThreadID=18;_ThreadName=Thread-3;|The following errors and warnings have been detected with resource and/or provider classes:
  SEVERE: Missing dependency for field: private com.skalio.bonusapp.core.User com.skalio.bonusapp.gateway.FooResource.user|#]

Answer 1

這是由於示波器不匹配造成的。 您正在嘗試將請求范圍的事物注入到沒有請求范圍的Bean中。 那行不通。