不扫描位于 Wildfly 模块中的 JPA 实体类

【问题标题】：JPA entity classes residing in a Wildfly module are not scanned不扫描位于 Wildfly 模块中的 JPA 实体类
【发布时间】：2014-12-11 19:12:40
【问题描述】：

我有一些 JPA 实体类驻留在 Wildfly 模块中。尽管该模块中有实体类，但该模块中没有 JPA 部署描述符（persistence.xml 文件）。这是模块的完整路径：

{Wildfly_installation}/modules/system/layers/base/br/edu/ufca/main/ufca.jar

模块描述符（位于同一文件夹中）：

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.3" name="br.edu.ufca">
    <resources>
        <resource-root path="ufca.jar"/>
    </resources>

    <dependencies>
        <module name="javax.faces.api"/>
    </dependencies>
</module>

现在我有一个 Web 应用程序，我在 META-INF\MANIFEST.MF 中声明了对这个模块的依赖：

Manifest-Version: 1.0
Class-Path: 
Dependencies: br.edu.ufca export

在 Web 应用程序中，我还有一个 persistence.xml 文件，其中列出了一些位于 ufca.jar 模块中的实体类：

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd" version="2.1">
    <persistence-unit name="criacao-email">
        <jta-data-source>java:jboss/datasources/CriacaoEmailDS</jta-data-source>

        <class>br.edu.ufca.modelo.Setor</class>
        <!-- more classes -->
    </persistence-unit>
</persistence>

问题是，例如，当我运行 Web 应用程序执行尝试使用 EntityManager 加载某些实体类的代码时，我得到如下异常：

Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: Setor is not mapped [SELECT s FROM Setor s ORDER BY s.nome]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1750) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1683) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:331) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.jboss.as.jpa.container.AbstractEntityManager.createQuery(AbstractEntityManager.java:443) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_20]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_20]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_20]
    at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_20]
    at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:401) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.weld.bean.builtin.CallableMethodHandler.invoke(CallableMethodHandler.java:42) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.weldx.persistence.EntityManager$911040993$Proxy$_$$_Weld$Proxy$.createQuery(Unknown Source) [hibernate-jpa-2.1-api-1.0.0.Final.jar:]
    at br.edu.ufca.criacaoemail.negocio.CriadorEmailSetorial.localizarSetores(CriadorEmailSetorial.java:28) [classes:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_20]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_20]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_20]
    at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_20]
    at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) [wildfly-ee-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
    at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.component.interceptors.NonPooledEJBComponentInstanceAssociatingInterceptor.processInvocation(NonPooledEJBComponentInstanceAssociatingInterceptor.java:59) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:273) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    ... 122 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Setor is not mapped [SELECT s FROM Setor s ORDER BY s.nome]
    at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:96) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:120) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:234) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:126) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:88) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:190) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1800) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:328) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    ... 168 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Setor is not mapped
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:189) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:109) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:95) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:331) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3633) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3522) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:278) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ... 176 more

这清楚地表明 JPA 提供程序没有扫描实体类。但是，如果我从 Web 应用程序访问 Wildfly 模块中的任何类而不使用 JPA，我就成功了，这表明该模块确实在应用程序的类路径中。

这是默认行为还是我做错了什么？

提前谢谢你。

马科斯

【问题讨论】：

    标签： java jakarta-ee wildfly


    【解决方案1】：

    模块目录中定义的模块不是部署的一部分，因此不会被扫描。如果您需要扫描您的实体，则需要将它们包含在您的部署中。

    【讨论】：

    • 我不知道。我还没有测试过，但是如果您在 persistence.xml 中列出实体，它可能会起作用。我不确定是否会在该阶段之前添加模块依赖项。
    • 您可以在我的问题中看到，我从一开始就在persistence.xml 中列出了实体类。它没有用。
    • 啊，对不起。我想那时可能没有办法。您必须将其包含在您的部署中。
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