创建 JPA 生产者端点时出错

【问题标题】：Getting error while creating JPA producer endpoint创建 JPA 生产者端点时出错
【发布时间】：2014-07-23 14:06:53
【问题描述】：

我是骆驼的新手。我正在为以下场景编写骆驼路线

  1. 从某个位置选择 XML 文件
  2. 针对 XSD 验证 XML 文件
  3. 将 XML 数据持久化到数据库中

我是这样写的

public void configure() throws Exception {
           JaxbDataFormat jaxb = new JaxbDataFormat();
           JAXBContext ctx = JAXBContext.newInstance(Book.class);
           jaxb.setContext(ctx);

           from("file:data/source?noop=true").to("validator:books.xsd")
                                         .to("file:data/destination").split()
                                         .tokenizeXML("book").unmarshal(jaxb)
                                         .to("jpa:com.labs.Book");
}

我的 XML 文件是：

<book>
           <author>Kishore</author>
           <title>The Second Book</title>
           <genre>Fiction</genre>
</book>

我的 XSD 是：

<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="book">
    <xs:complexType>
      <xs:sequence>
        <xs:element type="xs:string" name="author" nillable="false"/>
        <xs:element type="xs:string" name="title" nillable="false"/>
        <xs:element type="xs:string" name="genre" nillable="false" fixed="{Fiction,Bio}"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

我有用于 XML 的 JAXB 模型。我也有 pesristence.xml 文件。但是当我尝试执行我的应用程序时，我遇到了如下异常

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
log4j:WARN No appenders could be found for logger (org.springframework.orm.jpa.LocalEntityManagerFactoryBean).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
1168  camel  WARN   [main] openjpa.Enhance - Unenhanced classes were detected even though the enhancer has ran. Ensure that the EntityManagerFactory is created prior to creating any Entities.    
Exception in thread "main" org.apache.camel.FailedToCreateProducerException: Failed to create Producer for endpoint: Endpoint[jpa://com.labs.Book]. Reason: <openjpa-2.3.0-r422266:1540826 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: This configuration disallows runtime optimization, but the following listed types were not enhanced at build time or at class load time with a javaagent: "
com.labs.Book".
           at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:409)
           at org.apache.camel.impl.ProducerCache.acquireProducer(ProducerCache.java:123)
           at org.apache.camel.processor.SendProcessor.doStart(SendProcessor.java:202)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.DelegateAsyncProcessor.doStart(DelegateAsyncProcessor.java:79)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.RedeliveryErrorHandler.doStart(RedeliveryErrorHandler.java:1154)
           at org.apache.camel.support.ChildServiceSupport.start(ChildServiceSupport.java:41)
           at org.apache.camel.support.ChildServiceSupport.start(ChildServiceSupport.java:28)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.interceptor.DefaultChannel.doStart(DefaultChannel.java:153)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:61)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.MulticastProcessor.doStart(MulticastProcessor.java:993)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:61)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.MulticastProcessor.doStart(MulticastProcessor.java:993)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
          at org.apache.camel.processor.DelegateAsyncProcessor.doStart(DelegateAsyncProcessor.java:79)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.RedeliveryErrorHandler.doStart(RedeliveryErrorHandler.java:1154)
           at org.apache.camel.support.ChildServiceSupport.start(ChildServiceSupport.java:41)
           at org.apache.camel.support.ChildServiceSupport.start(ChildServiceSupport.java:28)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.interceptor.DefaultChannel.doStart(DefaultChannel.java:153)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:61)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.MulticastProcessor.doStart(MulticastProcessor.java:993)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:59)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:103)
           at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:89)
           at org.apache.camel.processor.DelegateAsyncProcessor.doStart(DelegateAsyncProcessor.java:79)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:74)
           at org.apache.camel.impl.RouteService.startChildService(RouteService.java:334)
           at org.apache.camel.impl.RouteService.warmUp(RouteService.java:158)
           at org.apache.camel.impl.DefaultCamelContext.doWarmUpRoutes(DefaultCamelContext.java:2263)
           at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:2193)
           at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:1981)
           at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1851)
           at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1683)
           at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
           at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1651)
           at com.labs.App.main(App.java:36)
Caused by: <openjpa-2.3.0-r422266:1540826 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: This configuration disallows runtime optimization, but the following listed types were not enhanced at build time or at class load time with a javaagent: "
com.labs.Book".
           at org.apache.openjpa.enhance.ManagedClassSubclasser.prepareUnenhancedClasses(ManagedClassSubclasser.java:115)
           at org.apache.openjpa.kernel.AbstractBrokerFactory.loadPersistentTypes(AbstractBrokerFactory.java:312)
           at org.apache.openjpa.kernel.AbstractBrokerFactory.initializeBroker(AbstractBrokerFactory.java:236)
           at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:212)
           at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:155)
           at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:226)
           at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:153)
           at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:59)
           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.springframework.orm.jpa.AbstractEntityManagerFactoryBean.invokeProxyMethod(AbstractEntityManagerFactoryBean.java:376)
           at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean$ManagedEntityManagerFactoryInvocationHandler.invoke(AbstractEntityManagerFactoryBean.java:519)
           at com.sun.proxy.$Proxy20.createEntityManager(Unknown Source)
           at org.apache.camel.component.jpa.JpaEndpoint.createEntityManager(JpaEndpoint.java:284)
           at org.apache.camel.component.jpa.JpaProducer.<init>(JpaProducer.java:44)
           at org.apache.camel.component.jpa.JpaEndpoint.createProducer(JpaEndpoint.java:106)
           at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:405)
           ... 82 more

感谢您的宝贵时间，感谢您的帮助。如果可能的话，请您参考一些指向 Camel JPA 示例的链接，其中 JPA 组件用作生产者。

【问题讨论】：

  • 我想我提供了所有需要的细节。如果您需要更多信息，请告诉我。请让我知道这是否是正确的方法？

标签： java jpa apache-camel


【解决方案1】：

从错误消息和 DuckDuckGo 的搜索结果显示的内容来看，您的配置中缺少一个部分，并且您编织了 com.labs.Book 类。

我不知道 OpenJPA，但this link 应该会为您提供更多信息。

  • 对于运行时，您需要启用 javaagent
  • 对于编译时间，您需要启用 maven/ant/whatever 构建配置并告诉 maven 编织您的类 com.labs.Book。

【讨论】：

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