Question

我们有一个项目可以创建一个包含JPA实体和服务类的jar文件来访问数据库。我们有许多不同的应用程序需要使用这个jar文件。我们希望将JPA jar文件部署为ejb-jar，让其他应用程序通过战争中包含的客户端jar文件来使用它。

与实体类一起，我们的JPA项目有一个通用服务接口，定义如下：

public interface GenericService {

    <T> T create(T t) throws Exception;

    <T> T find(Class<T> t, Object id) throws Exception;

    <T> T update(T t);

    List<?> findWithNamedQuery(String queryName) throws Exception;

    List<?> findWithNamedQuery(String queryName, int resultLimit) throws Exception;

    List<?> findWithNamedQuery(String namedQueryName, Map<String, Object> parameters) throws Exception;

    List<?> findWithNamedQuery(String namedQueryName, Map<String, Object> parameters, int resultLimit) throws Exception;

    <T> List<T> findWithNativeQueryListResult(String sql, Class<T> type) throws IllegalArgumentException;

    <T> List<T> findWithNativeQueryListResult(String sql) throws IllegalArgumentException;

    <T> T findWithNativeQuerySingleResult(String sql, Class<T> type) throws IllegalArgumentException;

    <T> T findWithNativeQuerySingleResult(String sql) throws IllegalArgumentException;
}

在无状态会话bean中实现：

@Stateless
@EJB(name = "java:global/DataService", beanName = "DataService", beanInterface = DataService.class)
@Local
public class DataService implements GenericService {

    @PersistenceContext(unitName = "database")
    private EntityManager em;

    protected EntityManager getEntityManager() {

        return this.em;
    }

    @Override
    public <T> T create(T t) throws IllegalArgumentException, EntityExistsException, PersistenceException {

        em.persist(t);
        return t;
    }

    .... etc ....
}

我们将Maven用于构建并将其设置为生成客户端jar：

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-ejb-plugin</artifactId>
    <version>2.3</version>
    <configuration>
      <!-- this is false by default -->
      <generateClient>true</generateClient>
      <ejbVersion>3.1</ejbVersion>
    </configuration>
  </plugin>

并设置了一个空的ejb-jar.xml文件：

<ejb-jar xmlns="http://java.sun.com/xml/ns/javaee" version="3.1" metadata-complete="false">
    <enterprise-beans>
    </enterprise-beans>
</ejb-jar>

生成的客户端文件在我们的war项目中用作依赖项：

<dependency>
    <groupId>my.package</groupId>
    <artifactId>data-model</artifactId>
    <version>1.0</version>
    <classifier>client</classifier>
</dependency>

当我们部署ejb-jar和war文件时，所有看起来都没问题。当我们尝试从war应用程序访问服务/实体类时，我们得到：

[#|2014-06-02T11:14:34.323-0600|WARNING|glassfish3.1.2|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=276;_ThreadName=Thread-6;|javax.ejb.EJBTransactionRolledbackException
        at com.sun.ejb.containers.BaseContainer.mapLocal3xException(BaseContainer.java:2314)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2096)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89)
        at com.sun.proxy.$Proxy133.createBatch(Unknown Source)
        at my.package.app1.__EJB31_Generated__BatchProcessor__Intf____Bean__.createBatch(Unknown Source)
        at my.package.app1.BatchRestService.createBatch(BatchRestService.java:58)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

... snip ...

Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean: java.lang.NoSuchMethodError: my.package.datamodel.entity.Batch.__jr_selector__(I[Ljava/lang/Object;)Ljava/lang/Object;
        at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:5074)
        at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4906)
        at com.sun.ejb.containers.StatefulSessionContainer.postInvokeTx(StatefulSessionContainer.java:1648)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045)
        ... 78 more
Caused by: java.lang.NoSuchMethodError: my.package.datamodel.entity.Batch.__jr_selector__(I[Ljava/lang/Object;)Ljava/lang/Object;
        at my.package.app1.BatchProcessor.createBatch(BatchProcessor.java:394)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052)
        at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124)
        at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:4180)
        at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5368)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214)
        ... 76 more

显然，我们的Batch实体类__jr_selector__上没有定义任何方法，所以它来自哪里？我该如何调试呢？

关于我们如何设置ejb-jar和/或使用它的战争的任何建议也将受到赞赏。

我们正在部署到Glassfish 3.1.2.2服务器。

部署ejb-jar以供多次战争（Glassfish）使用

0 个答案: