7

我在 Netbeans 7.2 中创建了一个全新的 Java EE 6 Enterprise-Application。所以我有三个项目：

  • 耳朵
  • EJB
  • 战争

在 EJB 项目中，我创建了一个简单的 Bean：

package de.aidaorga.test;

import javax.ejb.LocalBean;   
import javax.ejb.Stateless;

@Stateless
@LocalBean
public class NewSessionBean2343 {
}

在 WAR-Project 中，我在“Web Pages\WEB-INF”文件夹中创建了一个空白 beans.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/beans_1_0.xsd">
</beans>

我还创建了一个简单的 Servlet：

import de.aidaorga.test.NewSessionBean2343;
import java.io.IOException;
import javax.ejb.EJB;
import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "NewServlet2343", urlPatterns = {"/NewServlet2343"})
public class NewServlet2343 extends HttpServlet {
    @Inject
    NewSessionBean2343 newSessionBean2343_1;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }
}

现在，Netbeans 向我显示了一个警告“不满足的依赖关系：没有 bean 与注入点匹配”，用于使用“@Inject”注释的字段“newSessionBean2343_1”。

在部署时，我得到以下异常：

Schwerwiegend: Exception while loading the app
Schwerwiegend: Exception while loading the app : WELD-001408 Unsatisfied dependencies for type [NewSessionBean2343] with qualifiers [@Default] at injection point [[field] @Inject NewServlet2343.newSessionBean2343_1]
org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied dependencies for type [NewSessionBean2343] with qualifiers [@Default] at injection point [[field] @Inject NewServlet2343.newSessionBean2343_1]
at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:311)
at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:280)
at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:143)
at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:163)
at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:382)
at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:367)
at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:380)
at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:199)
at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:128)
at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:313)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:461)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:348)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:363)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1085)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:95)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1291)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1259)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:461)
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:212)
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
at com.sun.enterprise.v3.services.impl.ContainerMapper$Hk2DispatcherCallable.call(ContainerMapper.java:354)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)

为什么我会收到此警告以及如何摆脱它？

谢谢你的帮助。

马库斯

4

2 回答 2

9

我解决了这个问题：我刚刚忘记了 EJB 项目中的 beans.xml。EAR 项目中的一个 beans.xml 是不够的......

于 2012-08-29T10:48:41.977 回答
0

首先，这只是一个 IDE 警告 - 重要的是您的代码是否编译。

代码看起来没有错，尽管我不记得我曾经两次注入一个 bean。但是恕我直言，这应该可行。

我认为 Netbeans 只能验证@Inject，但不能@EJB，这可以解释警告。

尝试将其部署到服务器并查看结果。

于 2012-08-29T05:02:26.210 回答