Maven2多模块ejb 3.1项目-部署错误

Question

问题是我在将项目部署到 Glassfish 时遇到以下错误：

java.lang.RuntimeException: Unable to load EJB module.  DeploymentContext does not contain any EJB  Check archive to ensure correct packaging

但是，让我们开始了解 Maven2 中的项目结构如何...

我构建了以下场景：

MultiModuleJavaEEProject - 父模块
->型号--->打包成jar
-> ejb1---->打包为 ebj
-> ejb2---->打包为 ebj
->网站---->打包为 war

所以模型、ejb1、ejb2 和 web 是父 MultiModuleJavaEEProject 的子项/模块。

_ejb1 取决于型号。
_ejb2 依赖于 ejb1。
_web 依赖于 ejb2。

pom 看起来像：

_parent:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.dyndns.geraldhuber.testing</groupId>
  <artifactId>MultiModuleJavaEEProject</artifactId>
  <packaging>pom</packaging>
  <version>1.0</version>
  <name>MultiModuleJavaEEProject</name>
  <url>http://maven.apache.org</url>

  <modules>
    <module>model</module>
    <module>ejb1</module>
    <module>ejb2</module>
    <module>web</module>
  </modules>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.7</version>
      <scope>test</scope>
    </dependency>
  </dependencies>


  <build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-ejb-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <ejbVersion>3.1</ejbVersion>
                    <jarName>${project.groupId}.${project.artifactId}-${project.version}</jarName>
                </configuration>
            </plugin>
        </plugins>

    </pluginManagement>
  </build>

</project>

_model:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>testing</groupId>
    <artifactId>MultiModuleJavaEEProject</artifactId>
    <version>1.0</version>
  </parent>

  <artifactId>model</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <name>model</name>
  <url>http://maven.apache.org</url>
</project>

_ejb1:

  <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>testing</groupId>
    <artifactId>MultiModuleJavaEEProject</artifactId>
    <version>1.0</version>
  </parent>

  <artifactId>ejb1</artifactId>
  <packaging>ejb</packaging>
  <version>1.0</version>
  <name>ejb1</name>
  <url>http://maven.apache.org</url>

  <dependencies>
     <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.ejb</artifactId>
      <version>3.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>testing</groupId>
      <artifactId>model</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>
</project>

_ejb2:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>testing</groupId>
    <artifactId>MultiModuleJavaEEProject</artifactId>
    <version>1.0</version>
  </parent>

  <artifactId>ejb2</artifactId>
  <packaging>ejb</packaging>
  <version>1.0</version>
  <name>ejb2</name>
  <url>http://maven.apache.org</url>

  <dependencies>
     <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.ejb</artifactId>
      <version>3.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>testing</groupId>
      <artifactId>ejb1</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>
</project>

_web:

<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <artifactId>MultiModuleJavaEEProject</artifactId>
    <groupId>testing</groupId>
    <version>1.0</version>
  </parent>
  <groupId>testing</groupId>
  <artifactId>web</artifactId>
  <version>1.0</version>
  <packaging>war</packaging>
  <name>web Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <dependencies>
    <dependency> 
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.4</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.ejb</artifactId>
      <version>3.0</version>
      <scope>provided</scope>
    </dependency>


    <dependency>
      <groupId>testing</groupId>
      <artifactId>ejb2</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>


    <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.0</version>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
            </manifest>
          </archive>
        </configuration>
      </plugin>
    </plugins>
    <finalName>web</finalName>
  </build>  
</project>

模型只是一个简单的 Pojo：

package testing.model;
public class Data {
    private String data;
    public String getData() {
        return data;
    }
    public void setData(String data) {
        this.data = data;
    }
}

ejb1 仅包含一个 STATELESS ejb。

package testing.ejb1;

import javax.ejb.Stateless;
import testing.model.Data;

@Stateless
public class DataService {
    private Data data;
    public DataService(){
        data = new Data();
        data.setData("Hello World!");
    }
    public String getDataText(){
        return data.getData();
    }
}

并且 ejb2 只是一个无状态 ejb：

package testing.ejb2;

import javax.ejb.EJB;
import javax.ejb.Stateless;
import testing.ejb1.DataService;

@Stateless
public class Service {
    @EJB
    DataService service;

    public Service(){

    }
    public String getText(){
        return service.getDataText();
    }
}

并且 Web 模块仅包含一个 Servlet：

package testing.web;

import java.io.IOException;
import java.io.PrintWriter;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import testing.ejb2.Service;

public class SimpleServlet extends HttpServlet {

    @EJB
    Service service;

    public void doGet(HttpServletRequest request,
                      HttpServletResponse response)
        throws ServletException, IOException {

        PrintWriter out = response.getWriter();
        out.println( "SimpleServlet Executed" );
        out.println( "Text: "+service.getText() );
        out.flush();
        out.close();
    }
}

并且 Web 模块中的 web.xml 文件如下所示：

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>simple</servlet-name>
    <servlet-class>testing.web.SimpleServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>simple</servlet-name>
    <url-pattern>/simple</url-pattern>
  </servlet-mapping>
</web-app>

所以我没有设置其他文件。任何 ejb 文件中都没有 ejb-jar.xml，因为我使用的是 EJB 3.1。所以我认为 ejb-jar.xml 描述符是可选的。我这样说对吗？
但问题是，已经提到的错误：

java.lang.RuntimeException: Unable to load EJB module.  DeploymentContext does not contain any EJB  Check archive to ensure correct packaging

有人可以帮忙吗？

Answer 1

我不知道为什么你有一个 web.xml （而不是使用注释）...但如果你真的想要，将其更改为： 更改

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

为：

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/web-app_3_0.xsd"
version="3.0">
  <display-name>Archetype Created Web Application</display-name>
  ...
</web-app>

并重建/重新部署。

Answer 2

对于使用 Glassfish 3.1 和 Eclipse 3.7、m2e 1.0 和 m2e-wtp 集成遇到此问题的任何人：
Eclipse WTP for Glassfish 开始部署分解的 jar，这些 jar Glassfish 3.1 中存在错误。至少使用 Glassfish 3.1.1 Beta 1 来制作Eclipse WTP 集成再次工作。

要测试您是否受到此问题的影响，请测试当您从 Eclipse 导出 WAR 并使用 Glassfish 管理控制台手动部署它时一切是否正常。