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我有一个简单的 OmniFaces 1.8.3 视图范围 bean以及 OpenWebBeans 1.2.8（和 Mojarra 2.1.27 BTW）成功部署在 WebSphere 7（7.0.50）上：

import java.io.Serializable;
import java.util.List;

import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.inject.Named;

import org.omnifaces.cdi.ViewScoped;

...

@Named
@ViewScoped
public class CashValueCalculationManager implements Serializable {

    private static final long serialVersionUID = 1L;

    @EJB
    private CashValueCalculationService cashValueCalculationService;

    // the list of entities to be shown in a datatable
    private List<CashValueCalculation> entities;

    @PostConstruct
    public void init() {

        // displays "this.cashValueCalculationService = null" in the log
        System.out.println("this.cashValueCalculationService = " + this.cashValueCalculationService);

        // load list of entities on init
        try {
            this.loadViewData();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public List<CashValueCalculation> getEntities() {
        return this.entities;
    }

    protected CashValueCalculationService getEntityService() {
        return this.cashValueCalculationService;
    }

    protected void loadViewData() throws Exception {

        // NPE here!
        List<CashValueCalculation> cashValueCalculations = this.getEntityService().findAll();

        this.entities = cashValueCalculations;
    }
}

然而，当打开 bean 的视图时，bean 被初始化，运行@PostConstruct加载所有实体（只有少数）的方法，但这会失败并NullPointerException在 loadViewData() 中出现。返回的服务是空的......这基本上得到了我还找到该行的日志的确认

this.cashValueCalculationService = null

CashValueCalculationService接口用 注释，实现@Local用CashValueCalculationServiceBean注释@Stateless：

@Local
public interface CashValueCalculationService extends EntityService<Integer, CashValueCalculation> {
    // super interface has findAll()
}

豆：

@Stateless
public class CashValueCalculationServiceBean extends BaseEntityServiceBean<Integer, CashValueCalculation> implements CashValueCalculationService {
    // super class has findAll() implementation
}

在尝试 WebSphere 7 热潮中的 OmniFaces/CDI/OpenWebBeans 之前，我已成功地将其注入 JSF 托管 bean。

当应用程序部署在服务器上时，会出现以下日志条目：

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.
.
[13.07.17 16:56:13:889 CEST] 00000013 WebContainerL I   OpenWebBeans Container is starting...
[13.07.17 16:56:13:894 CEST] 00000013 PluginLoader  I   Adding OpenWebBeansPlugin : [OpenWebBeansJsfPlugin]
[13.07.17 16:56:13:899 CEST] 00000013 AbstractMetaD I   added beans.xml marker: wsjar:file:/C:/IBM/WebSphere7.0/AppServer/profiles/CLDSrv7050/installedApps/srv-cld-helNode03Cell/CLD.ear/lib/omnifaces-1.8.3.jar!/META-INF/beans.xml
[13.07.17 16:56:13:901 CEST] 00000013 AbstractMetaD I   added beans.xml marker: file:/C:/IBM/WebSphere7.0/AppServer/profiles/CLDSrv7050/installedApps/srv-cld-helNode03Cell/CLD.ear/cld-web.war/WEB-INF/beans.xml
[13.07.17 16:56:15:051 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.facesviews.FacesViewsInitializer] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletContainerInitializer 
[13.07.17 16:56:15:322 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.component.output.cache.CacheInitializerListener] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.FilterRegistration 
[13.07.17 16:56:15:328 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.util.Platform] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletRegistration 
[13.07.17 16:56:15:581 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.facesviews.FacesViewsInitializer] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletContainerInitializer 
[13.07.17 16:56:15:586 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.component.output.cache.CacheInitializerListener] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.FilterRegistration 
[13.07.17 16:56:15:588 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.util.Platform] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletRegistration 
[13.07.17 16:56:16:438 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.facesviews.FacesViewsInitializer] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletContainerInitializer 
[13.07.17 16:56:16:443 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.component.output.cache.CacheInitializerListener] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.FilterRegistration 
[13.07.17 16:56:16:446 CEST] 00000013 AbstractMetaD W   Ignoring class [org.omnifaces.util.Platform] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletRegistration 
[13.07.17 16:56:17:199 CEST] 00000013 BeansDeployer I   All injection points were validated successfully.
[13.07.17 16:56:17:236 CEST] 00000013 WebContainerL I   OpenWebBeans Container has started, it took [3345] ms.
[13.07.17 16:56:17:291 CEST] 00000013 config        I   Mojarra 2.1.27 ( 20140108-1632 https://svn.java.net/svn/mojarra~svn/tags/2.1.27@12764) für Kontext '/cld' wird initialisiert.
[13.07.17 16:56:17:739 CEST] 00000013 application   I   JSF1048: PostConstruct/PreDestroy-Annotationen vorhanden.  Verwaltete Bean-Methoden, die mit diesen Annotationen markiert sind, lassen die entsprechenden Annotationen verarbeiten.
[13.07.17 16:56:19:334 CEST] 00000013 config        W   JSF1067: Ressource /WEB-INF/common-ui.taglib.xml, die von der Konfigurationsoption javax.faces.CONFIG_FILES angegeben wird, kann nicht gefunden werden.  Die Ressource wird ignoriert.
[13.07.17 16:56:19:336 CEST] 00000013 config        W   JSF1067: Ressource /WEB-INF/common-functions.taglib.xml, die von der Konfigurationsoption javax.faces.CONFIG_FILES angegeben wird, kann nicht gefunden werden.  Die Ressource wird ignoriert.
[13.07.17 16:56:19:475 CEST] 00000013 PostConstruct I   Running on PrimeFaces 6.0.15
[13.07.17 16:56:19:478 CEST] 00000013 VersionLogger I   Using OmniFaces version 1.8.3
[13.07.17 16:56:19:497 CEST] 00000013 lifecycle     I   JSF1027: [null Die ELResolvers für JSF wurden nicht im JSP-Container registriert.
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参赛作品

Ignoring class [org.omnifaces.facesviews.FacesViewsInitializer] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletContainerInitializer 
Ignoring class [org.omnifaces.component.output.cache.CacheInitializerListener] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.FilterRegistration 
Ignoring class [org.omnifaces.util.Platform] because it could not be loaded: java.lang.NoClassDefFoundError: javax.servlet.ServletRegistration

出现在最有趣的人面前。

但它们实际上是什么意思？

当然，这有点清楚，servlet.api缺少课程。

<dependency org="javax.servlet" name="servlet-api" rev="2.5" />

（抱歉，这是 Ant/Ivy 语法）

但是，在登录时添加javax-servlet-api-2.5.jar到部署中会完全破坏应用程序，并说“FacesServlet 不是 Servlet 类”：

在 HTML 中：

Original Exception:
Error message: javax.servlet.UnavailableException: SRVE0201E: Servlet [javax.faces.webapp.FacesServlet] is not a servlet class.
Error code: 404
Target servlet: Faces Servlet
Stacktrace:
javax.servlet.UnavailableException: SRVE0201E: Servlet [javax.faces.webapp.FacesServlet] is not a servlet class.
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:535)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:503)
     at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:181)
     at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3954)
     at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
     at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:942)
     at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1592)
     at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:453)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:306)
     at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
     at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
     at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
     at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
     at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
     at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
     at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
     at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
     at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1646)

我必须尽可能地翻译错误信息。WebSphere 7 BTW 是一个 Servlet 2.5 容器，所以问题可能与类加载器有关……？

大问题：

为什么此设置无法通过@EJB基本可用的场景（没有javax.servlet依赖关系）注入 EJB？bean 和 bean manager 似乎存在，那么为什么它不能通过注入@EJB？

你怎么可能治愈这个？可以做到吗？

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2 回答 2

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WAS-7 实现了 JavaEE 5 标准。这还不包括 CDI。这意味着 EJB 和 CDI 之间也没有集成。

您可以做的是编写一个使用 ProcessAnnotatedType 的 CDI 扩展，并为所有 CDI 类创建一个自定义编程 Bean，每个找到的 @EJB。这个自定义 Bean 只是通过 JNDI 查找 EJB，仅此而已。

如果您只需要几次，那么您还可以使用 @PostConstruct 方法并直接在类中从 JNDI 上下文中获取 EJB。

于 2017-07-25T13:02:04.310 回答
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您是否将自己的 JSF (Myfaces) 和 CDI (OpenWebBeans) 实现嵌入到您的应用程序中？如果您这样做，请阅读有关如何配置 WAS 以使用您自己的 JSF 实现的文档。您不能在 WAS 中覆盖/使用 CDI 实现您也可以以 CDI 方式（@Inject）而不是 EJB 方式注入 EJB ..（@EJB）？

于 2017-07-14T12:44:13.863 回答