如何在 JBoss "Wildfly" 中的 2 个 EAR 之间共享 JPA 数据模型

Question

我们有一个像这样的 JBoss v8 "Wildfly" 部署：

App-ear.ear
|_App-model.jar
|_App-ejb.jar
|_App-web.war

此部署在 App-model.jar 内带有一个 persistence.xml。现在我想部署第二个 EAR，它有一个不同的 WAR 模块，我可以独立于原始应用程序重新部署它。为此，我创建了第二个 EAR，如下所示：

Second-ear.ear
|_Second-web.war

第二个应用程序在 Eclipse 开发期间（设置为 Maven 项目）具有对 App-model.jar 的类路径依赖性，并且构建得很好。为了使该依赖项在运行时可用，我编辑了 Second-ear.ear/META-INF/jboss-deployment-structure.xml，如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
    <deployment>

        <dependencies>
            <module name="deployment.App-ear.ear.App-model.jar" />   
        </dependencies>

    </deployment>
</jboss-deployment-structure>

但是 JBoss AS 加载持久性失败并出现以下错误：

2015-08-19 09:13:36,903 ERROR [] [ @ ] [] [MSC service thread 1-5] [fail] MSC000001: Failed to start service jboss.deployment.unit."Second-ear.ear".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."Second-ear.ear".WeldStartService: Failed to start service
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1904) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]
Caused by: java.lang.IllegalArgumentException: JBAS016069: Error injecting persistence unit into CDI managed bean. Can't find a persistence unit named MyPersistenceUnitName in deployment Second-ear.ear
    at org.jboss.as.weld.services.bootstrap.WeldJpaInjectionServices.getScopedPUName(WeldJpaInjectionServices.java:110)
    at org.jboss.as.weld.services.bootstrap.WeldJpaInjectionServices.registerPersistenceUnitInjectionPoint(WeldJpaInjectionServices.java:90)
    at org.jboss.weld.injection.ResourceInjectionFactory$PersistenceUnitResourceInjectionProcessor.getResourceReferenceFactory(ResourceInjectionFactory.java:279)
    at org.jboss.weld.injection.ResourceInjectionFactory$PersistenceUnitResourceInjectionProcessor.getResourceReferenceFactory(ResourceInjectionFactory.java:267)
    at org.jboss.weld.injection.ResourceInjectionFactory$ResourceInjectionProcessor.createFieldResourceInjection(ResourceInjectionFactory.java:207)
    at org.jboss.weld.injection.ResourceInjectionFactory$ResourceInjectionProcessor.createResourceInjections(ResourceInjectionFactory.java:182)
    at org.jboss.weld.injection.ResourceInjectionFactory.discoverType(ResourceInjectionFactory.java:405)
    at org.jboss.weld.injection.ResourceInjectionFactory.getResourceInjections(ResourceInjectionFactory.java:92)
    at org.jboss.weld.injection.producer.ResourceInjector.<init>(ResourceInjector.java:59)
    at org.jboss.weld.injection.producer.ResourceInjector.of(ResourceInjector.java:49)
    at org.jboss.weld.injection.producer.BeanInjectionTarget.<init>(BeanInjectionTarget.java:62)
    at org.jboss.weld.injection.producer.BeanInjectionTarget.createDefault(BeanInjectionTarget.java:46)
    at org.jboss.weld.manager.InjectionTargetFactoryImpl.chooseInjectionTarget(InjectionTargetFactoryImpl.java:128)
    at org.jboss.weld.manager.InjectionTargetFactoryImpl.createInjectionTarget(InjectionTargetFactoryImpl.java:87)
    at org.jboss.weld.bean.ManagedBean.<init>(ManagedBean.java:91)
    at org.jboss.weld.bean.ManagedBean.of(ManagedBean.java:71)
    at org.jboss.weld.bootstrap.AbstractBeanDeployer.createManagedBean(AbstractBeanDeployer.java:264)
    at org.jboss.weld.bootstrap.BeanDeployer.createClassBean(BeanDeployer.java:228)
    at org.jboss.weld.bootstrap.ConcurrentBeanDeployer.doWork(ConcurrentBeanDeployer.java:78)
    at org.jboss.weld.bootstrap.ConcurrentBeanDeployer.doWork(ConcurrentBeanDeployer.java:75)
    at org.jboss.weld.executor.IterativeWorkerTaskFactory.call(IterativeWorkerTaskFactory.java:60)
    at org.jboss.weld.executor.IterativeWorkerTaskFactory.call(IterativeWorkerTaskFactory.java:53)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [rt.jar:1.8.0_25]
    ... 3 more

尝试使用该持久性单元的 CDI Bean 注入了由原始 App-model.jar:

生成的 EntityManager

@Named("test")
public class Test {

    @Inject
    @MyModelDB // Qualifier
    private EntityManager em = null;

    // A simple test of the datamodel...
    public Long numberOfProjects() {
        if (this.em != null) {
            return ((BigDecimal) this.em.createNativeQuery("select count(*) from e_bo_projects").getSingleResult()).longValue();
        }
        return -1L;
    }
}

我该如何解决这个问题？

Answer 1

我现在已经成功部署了我的两个 EAR...感谢您对我的原始问题的评论。如果 persistence.xml 不包含 JNDI 绑定，我使用包含相同数据模型 JAR 的 2 EAR 的初始方法是有效的。谢谢@弗兰克！提到的 jboss-deployment-structure.xml 不再指我的另一个 EAR。

所以现在我的部署是这样的：

App-ear.ear
|_App-model.jar
|_App-ejb.jar
|_App-web.war

Second-ear.ear
|_App-model.jar
|_Second-web.war

这对这两种应用程序都有效，我在这两种情况下都成功访问了数据库。

如何在 JBoss "Wildfly" 中的 2 个 EAR 之间共享 JPA 数据模型

How to share JPA data model between 2 EAR in JBoss "Wildfly"

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jpa

wildfly