Использование Spring данных JPA в Google Appengine

Я пытаюсь использовать Spring 3.2 и Spring данные по GAE и некоторые проблемы с правильной настройкой конфигурации. Это минимально, но из документации Spring Data кажется, что вам не нужно гораздо больше, чем просто entitymanagerfactory bean.

Здесь моя конфигурация и исключение я получаю при запуске. Может ли кто-нибудь предложить решение для исключения, которое я получаю с помощью Datanucleus JPA 2.0?

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>
    <version>1.0.0-SNAPSHOT</version>

    <groupId>com.foo</groupId>
    <artifactId>bar</artifactId>

    <properties>
        <appengine.version>1.7.5</appengine.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <slf4j.version>1.7.2</slf4j.version>
        <datanucleus.version>3.0.6</datanucleus.version>
        <spring.version>3.2.1.RELEASE</spring.version>
        <spring-data.version>1.3.0.RELEASE</spring-data.version>
    </properties>

    <dependencies>
        <!-- Compile/runtime dependencies -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>${appengine.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>${spring-data.version}</version>
        </dependency>

        <!-- Logging dependencies -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-jdk14</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <!-- JPA 2.0 for GAE -->
        <dependency>
            <groupId>com.google.appengine.orm</groupId>
            <artifactId>datanucleus-appengine</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jpa</artifactId>
            <version>${datanucleus.version}</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <version>${datanucleus.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-jpa_2.0_spec</artifactId>
            <version>1.0</version>
        </dependency>

        <!-- Test Dependencies -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.10</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>1.9.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-testing</artifactId>
            <version>${appengine.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-stubs</artifactId>
            <version>${appengine.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <version>2.5.1</version>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <archiveClasses>true</archiveClasses>
                    <webResources>
                        <!-- in order to interpolate version from pom into appengine-web.xml -->
                        <resource>
                            <directory>${basedir}/src/main/webapp/WEB-INF</directory>
                            <filtering>true</filtering>
                            <targetPath>WEB-INF</targetPath>
                        </resource>
                    </webResources>
                </configuration>
            </plugin>

            <plugin>
                <groupId>com.google.appengine</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>${appengine.version}</version>
            </plugin>
        </plugins>
    </build>

</project>

Конфигурация JPA

@Configuration
@EnableJpaRepositories("com.foo.bar.domain")
@EnableTransactionManagement
class JpaApplicationConfig {
    private static final Logger logger = Logger
            .getLogger(JpaApplicationConfig.class.getName());

    @Bean
    public EntityManagerFactory entityManagerFactory() {
        logger.info("Loading Entity Manager...");
        return Persistence
                .createEntityManagerFactory("eventual-reads-short-deadlines");
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        logger.info("Loading Transaction Manager...");
        final JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(entityManagerFactory());
        return txManager;
    }
}

Exception

[INFO] SEVERE: Context initialization failed
[INFO] org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0': Initialization of bean failed; nested exception is java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:532)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
[INFO]  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:741)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
[INFO]  at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
[INFO]  at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
[INFO]  at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
[INFO]  at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.jetty.Server.doStart(Server.java:224)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:228)
[INFO]  at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
[INFO]  at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:333)
[INFO]  at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:269)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:245)
[INFO] Caused by: java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:142)
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.<init>(PersistenceExceptionTranslationInterceptor.java:79)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor.<init>(PersistenceExceptionTranslationAdvisor.java:70)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory(PersistenceExceptionTranslationPostProcessor.java:103)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1506)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.access$000(AbstractAutowireCapableBeanFactory.java:116)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$5.run(AbstractAutowireCapableBeanFactory.java:1468)
[INFO]  at java.security.AccessController.doPrivileged(Native Method)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1466)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
[INFO]  ... 30 more
[INFO] 
[INFO] Mar 12, 2013 11:10:49 AM com.google.apphosting.utils.jetty.JettyLogger warn
[INFO] WARNING: Failed startup of context c[email protected]2912ee3c{/,/home/tim/workspace-me/Dating/target/dating-1.0.0-SNAPSHOT}
[INFO] org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0': Initialization of bean failed; nested exception is java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:532)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
[INFO]  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:741)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
[INFO]  at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
[INFO]  at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
[INFO]  at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
[INFO]  at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.jetty.Server.doStart(Server.java:224)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:228)
[INFO]  at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
[INFO]  at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:333)
[INFO]  at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:269)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:245)
[INFO] Caused by: java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:142)
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.<init>(PersistenceExceptionTranslationInterceptor.java:79)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor.<init>(PersistenceExceptionTranslationAdvisor.java:70)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory(PersistenceExceptionTranslationPostProcessor.java:103)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1506)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.access$000(AbstractAutowireCapableBeanFactory.java:116)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$5.run(AbstractAutowireCapableBeanFactory.java:1468)
[INFO]  at java.security.AccessController.doPrivileged(Native Method)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1466)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
[INFO]  ... 30 more
[INFO] 
[INFO] Mar 12, 2013 11:10:49 AM com.google.apphosting.utils.jetty.JettyLogger warn
[INFO] WARNING: Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0': Initialization of bean failed; nested exception is java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.:
[INFO] java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:142)
[INFO]  at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.<init>(PersistenceExceptionTranslationInterceptor.java:79)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor.<init>(PersistenceExceptionTranslationAdvisor.java:70)
[INFO]  at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory(PersistenceExceptionTranslationPostProcessor.java:103)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1506)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.access$000(AbstractAutowireCapableBeanFactory.java:116)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$5.run(AbstractAutowireCapableBeanFactory.java:1468)
[INFO]  at java.security.AccessController.doPrivileged(Native Method)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1466)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
[INFO]  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
[INFO]  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
[INFO]  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:741)
[INFO]  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
[INFO]  at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
[INFO]  at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
[INFO]  at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
[INFO]  at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[INFO]  at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[INFO]  at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[INFO]  at org.mortbay.jetty.Server.doStart(Server.java:224)
[INFO]  at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[INFO]  at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:228)
[INFO]  at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
[INFO]  at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
[INFO]  at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:333)
[INFO]  at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:269)
[INFO]  at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:245)
[INFO] 
[INFO] Mar 12, 2013 11:10:49 AM com.google.apphosting.utils.jetty.JettyLogger debug

ОТВЕТЫ

Ответ 1

В автономных средах мы рекомендуем использовать классы поддержки Spring для настройки EntityManagerFactory. Поэтому, если вы измените конфигурацию на следующую, добавление дополнительного объявления bean не требуется:

 @Bean
 public AbstractEntityManagerFactoryBean entityManagerFactory() {

   LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
   factory.setPersistenceUnitName("eventual-reads-short-deadlines");
   return factory;
 }

 @Bean
 public PlatformTransactionManager transactionManager() {

    JpaTransactionManager txManager = new JpaTransactionManager();
    txManager.setEntityManagerFactory(entityManagerFactory().getObject());
    return txManager;
}

Важнейшей частью является реализация FactoryBean, доступная как Spring bean, поскольку она реализует PersistenceExceptionTranslator.

Ответ 2

Я нашел решение, но это не самое выгодное, на мой взгляд. Я добавил в свою конфигурацию:

@Bean
    public PersistenceExceptionTranslator persistenceExceptionTranslator() {
        return new OpenJpaDialect();
    }

Я не начал проверять, работает ли это, но это исключает исключение исключения. Я бы предпочел использовать специфический переводчик Datanucleus, но я не знаю, существует ли он. Дополнительные решения приветствуются.