EAR情况下的MyBatis CDI类加载器问题 [英] MyBatis CDI class loader issue in case of EAR

问题描述

我有一个EAR，目前只包含一个WAR.我的问题是，如果 mybatis -.... jar 文件位于 web-module.war \ WEB-INF \ lib 下，则一切正常.但是，如果我用Maven进行了一场皮包骨头的战争，并且两个与mybatis相关的罐子位于EAR/lib下，则会出现"没有正确配置SqlSessionFactory生产者."错误.

I have an EAR which at the moment contains only one WAR. My issue is if the mybatis-....jar files locate under web-module.war\WEB-INF\lib then everything works fine. BUT if I create a skinny war with maven and the two mybatis related jars locate under EAR/lib I get a "There are no SqlSessionFactory producers properly configured." error.

我似乎是与类路径有关的问题.

I seems that it is a classpath related issue.

我正计划在我的EAR中添加更多WAR，我想避免将这两个jar放入每个WAR中的情况.

I am planning to add more WAR into my EAR and I would like to avoid the situation to put these two jars into each WARs.

环境:Java 8，Payara Server 4.1.2.172

Environment: Java 8, Payara Server 4.1.2.172

这是我的EAR的结构，但是不起作用

EAR
  +-- lib
       + mybatis-3.4.4.jar
       + mybatis-cdi-1.0.0.jar

  +-- web-module.war

Web模块包含带有注入的EJB的servlet.该EJB使用myBatis映射器.

The web module contains a servlet with an injected EJB. This EJB uses myBatis mapper.

Servlet

@WebServlet("/echo")
public class EchoServlet extends HttpServlet {
    @EJB
    private EchoService echoService;

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        try (PrintWriter writer = resp.getWriter()) {
            writer.println(echoService.echo("lorempisum"));
        }
    }
}

EJB

@Stateless
public class EchoBean implements EchoService {

    @Inject
    private AccountDao accountDao;

    @Override
    public String echo(String text) {
        List<String> emails = accountDao.findAll();
        return "Hello " + text + "! There are " + emails.size() + " emails in the DB.");
    }
}

MyBatis映射器

@Mapper
public interface AccountDao {
    @Select("SELECT email FROM dev.account")
    List<String> findAll();
}

如果我更改EAR的结构，那么我的项目就可以正常工作.

EAR
  +-- lib

  +-- web-module.war
       +-- WEB-INF
            +-- lib
                 +-- mybatis-3.4.4.jar
                 +-- mybatis-cdi-1.0.0.jar

---

我试图将 MANIFEST.MF 文件添加到 ear \ web-module.war \ META-INF 目录中，但没有帮助:

---

I tried to add MANIFEST.MF file to ear\web-module.war\META-INF directory with the following content but it did not help:

Class-Path: lib/mybatis-3.4.4.jar lib/mybatis-cdi-1.0.0.jar

我还尝试将 glassfish-web.xml 文件添加到 ear \ web-module.war \ WEB-INF 目录，如

I also tried to add glassfish-web.xml file to ear\web-module.war\WEB-INF directory as described here but it did not help:

<glassfish-web-app>
    <class-loader delegate="true" extra-class-path="../lib/mybatis-3.4.4.jar:../lib/mybatis-cdi-1.0.0.jar"/>
</glassfish-web-app>

有什么办法解决这个类路径问题吗?

Any idea how to solve this classpath issue?

推荐答案

这是解决方案:

• 阅读: mybatis-cdi问题跟踪器
• 阅读: payara应用服务器问题跟踪器
• src:我的mybatis-ee-demo应用程序
• src:我的mybatis-web-demo应用程序

• to read: mybatis-cdi issue tracker
• to read: payara app server issue tracker
• src: my mybatis-ee-demo application
• src: my mybatis-web-demo application

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