eclipselink-2.5.2 Spring 4.1.1目前没有事务处于活动状态错误

时间：2014-10-29 09:21:10

标签： mysql spring spring-mvc jpa eclipselink

已解决：浏览评论/聊天

我正在使用Spring 4.1.1和基于注释的配置。在尝试使用带弹簧的eclipselink时，我在merge方法上遇到错误{1}}

以下是 stacktrace： 

No transaction is currently active

WebConfig.java 

javax.persistence.TransactionRequiredException: 
Exception Description: No transaction is currently active
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionWrapper.throwCheckTransactionFailedException(EntityTransactionWrapper.java:87)
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionWrapper.checkForTransaction(EntityTransactionWrapper.java:50)
Exception occured at : javax.persistence.TransactionRequiredException: 
Exception Description: No transaction is currently active
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.checkForTransaction(EntityManagerImpl.java:2041)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:863)
    at com.cdl.box.dao.GenericDao.merge(GenericDao.java:61)
    at com.cdl.box.dao.GenericDao$$FastClassBySpringCGLIB$$9e11ea6a.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
    at com.cdl.box.dao.PersonDao$$EnhancerBySpringCGLIB$$51ee0a8f.merge(<generated>)
    at com.cdl.box.service.person.PersonService.addPerson(PersonService.java:23)
    at com.cdl.box.service.person.PersonService$$FastClassBySpringCGLIB$$dbc06f33.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:266)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
    at com.cdl.box.service.person.PersonService$$EnhancerBySpringCGLIB$$35eaf713.addPerson(<generated>)
    at com.cdl.box.controller.PersonController.add(PersonController.java:55)
    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.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:781)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:721)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

DBConfig.java 

@EnableWebMvc
@Configuration
@ComponentScan("com.myapp")
@PropertySource(value = "classpath:application.properties")
@EnableTransactionManagement(proxyTargetClass=true)
public class WebConfig extends WebMvcConfigurerAdapter{

    @Bean
    public static PropertySourcesPlaceholderConfigurer getPropertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

    @Bean
    public UrlBasedViewResolver setupViewResolver() {
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();
        System.out.println("UrlBasedViewResolver........");
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        return resolver;
    }

    @Bean
    MultipartResolver multipartResolver() {
        MultipartResolver resolver = new StandardServletMultipartResolver();
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        System.out.println("In Resouce Handler");
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/defaultTheme/");
    }


}

WebInitializer.java 

import java.util.Properties;

import javax.sql.DataSource;

import org.eclipse.persistence.platform.database.DatabasePlatform;
import org.eclipse.persistence.platform.database.MySQLPlatform;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableLoadTimeWeaving;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver;
import org.springframework.instrument.classloading.SimpleLoadTimeWeaver;
import org.springframework.orm.jpa.JpaDialect;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.EclipseLinkJpaDialect;
import org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.jolbox.bonecp.BoneCPDataSource;

@Configuration
@EnableTransactionManagement(proxyTargetClass = true)
@EnableLoadTimeWeaving
public class DBConfig {

    @Value("${jdbc.driverClassName}")
    private String driverClassName;

    @Value("${jdbc.url}")
    private String url;

    @Value("${jdbc.username}")
    private String username;

    @Value("${jdbc.password}")
    private String password;

    @Value("${eclipselink.persistenceUnitName}")
    private String persistenceUnitName;

    @Bean()
    public DataSource getDataSource() {
        BoneCPDataSource ds = new BoneCPDataSource();
        System.out.println("Driver Name : " + driverClassName);
        System.out.println("Url : " + url);
        ds.setDriverClass(driverClassName);
        ds.setJdbcUrl(url);
        ds.setUsername(username);
        ds.setPassword(password);
        ds.setMaxConnectionsPerPartition(5);
        ds.setMinConnectionsPerPartition(2);
        ds.setAcquireIncrement(2);
        return ds;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        em.setDataSource(getDataSource());          
        em.setJpaDialect(jpaDialect());
        em.setPackagesToScan("com.myapp.model", "com.myapp.model.person");
        em.setPersistenceUnitName(persistenceUnitName);
        DatabasePlatform dp = new MySQLPlatform();
        em.setJpaVendorAdapter(getEclipseLinkJpaVendorAdapter());
        //em.setLoadTimeWeaver(new SimpleLoadTimeWeaver());
        em.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());
        return em;
    }

    @Bean
    public EclipseLinkJpaVendorAdapter getEclipseLinkJpaVendorAdapter() {
        EclipseLinkJpaVendorAdapter vendorAdapter = new EclipseLinkJpaVendorAdapter();
        vendorAdapter.setDatabasePlatform("org.eclipse.persistence.platform.database.MySQLPlatform");
        vendorAdapter.setGenerateDdl(false);
        vendorAdapter.setShowSql(true);
        return vendorAdapter;
    }


    @Bean
    public PlatformTransactionManager transactionManager() {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactoryBean().getObject());
        return transactionManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor persistenceExceptionTranslationPostProcessor() {
        return new PersistenceExceptionTranslationPostProcessor();
    }

    @Bean
    public JpaDialect jpaDialect() {
        return new EclipseLinkJpaDialect();
    }
}

获取数据非常有效。使用eclipselink进行插入/更新时出错。

我经历过很多帖子＆amp;应用了所有建议。但不幸的是它没有用。我不确定我错过了什么。你看到配置有什么问题吗？请告诉我这里我做错了什么。

修改

以下是我的@Transactional服务类。

import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class WebInitializer implements WebApplicationInitializer{

    public void onStartup(ServletContext servletContext) throws ServletException {

        // TODO Auto-generated method stub
        System.out.println("In WebApplicationInitializer.....");
        AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();

         // Manage the lifecycle of the root application context
        servletContext.addListener(new ContextLoaderListener(rootContext));
        servletContext.setInitParameter("contextConfigLocation", "<NONE>");


        rootContext.register(DBConfig.class);
        rootContext.register(WebConfig.class);      

        rootContext.setServletContext(servletContext);                      

        ServletRegistration.Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext));
        servlet.setLoadOnStartup(1);
        servlet.addMapping("/");
        servlet.setMultipartConfig(new MultipartConfigElement("/img", 1024*1024*5, 1024*1024*5*5, 1024*1024));  

    }

}

对于服务类的@Transactional，我在启动import java.util.List; import org.eclipse.persistence.queries.ReadAllQuery; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import com.myapp.dao.PersonDao; import com.myapp.model.person.Person; @Service @Transactional(propagation=Propagation.REQUIRED) public class PersonService { @Autowired private PersonDao personDao; public void addPerson(Person person) { Person p = personDao.merge(person); System.out.println(p.getCity()); } public void updatePerson(Person person) { personDao.persist(person); } public Person getPerson(int id) { return personDao.findById(id); } public void deletePerson(int id) { personDao.deleteById(id); } public List<Person> getPersons(int first, int rows){ ReadAllQuery readAllQuery = new ReadAllQuery(Person.class); readAllQuery.setJPQLString("SELECT OBJECT(per) FROM Person per"); return personDao.executeReadAllQuery(readAllQuery, first, rows); } }

时会出现以下错误 
Tomcat

EDIT2：

我已针对org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'personController' defined in file [D:\Hemraj-Dev\apache-tomcat-7.0.56\webapps\yourbox\WEB-INF\classes\com\myapp\controller\PersonController.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.myapp.service.person.PersonService]: : Error creating bean with name 'personService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myapp.dao.PersonDao com.myapp.service.person.PersonService.personDao; nested exception is java.lang.IllegalArgumentException: Can not set com.myapp.dao.PersonDao field com.myapp.service.person.PersonService.personDao to com.sun.proxy.$Proxy25; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myapp.dao.PersonDao com.myapp.service.person.PersonService.personDao; nested exception is java.lang.IllegalArgumentException: Can not set com.myapp.dao.PersonDao field com.myapp.service.person.PersonService.personDao to com.sun.proxy.$Proxy25 at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:751) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1133) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1036) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:505) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4992) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myapp.dao.PersonDao com.myapp.service.person.PersonService.personDao; nested exception is java.lang.IllegalArgumentException: Can not set com.myapp.dao.PersonDao field com.myapp.service.person.PersonService.personDao to com.sun.proxy.$Proxy25 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1081) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1006) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:904) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:743) ... 24 more Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myapp.dao.PersonDao com.myapp.service.person.PersonService.personDao; nested exception is java.lang.IllegalArgumentException: Can not set com.myapp.dao.PersonDao field com.myapp.service.person.PersonService.personDao to com.sun.proxy.$Proxy25 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:555) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ... 36 more Caused by: java.lang.IllegalArgumentException: Can not set com.myapp.dao.PersonDao field com.myapp.service.person.PersonService.personDao to com.sun.proxy.$Proxy25 at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164) at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168) at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81) at java.lang.reflect.Field.set(Field.java:741) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:551) ... 38 more 错误替换了新的stacktarce问题。以下是我的DAO。

PersonDao.java： 

No Transaction is currently active

GenericDao.java 

import javax.persistence.Query;

import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.myapp.model.person.Person;

@Repository("personDao")
public class PersonDao extends GenericDao<Person, Integer> {

    @Override
    public int deleteById(Integer id) {
        Query q = getEntityManager().createQuery(
                "delete from Employees where employeeId = :id");
        q.setParameter("id", id);
        return q.executeUpdate();       
    }

}

EDIT3：

使用 public class GenericDao<E, ID extends Serializable>{ private final Class<E> persistentClass; protected EntityManager entityManager; private EntityManagerFactory emf; @PersistenceContext(unitName = "cdlbox") private EntityManager em; @Value("${eclipselink.persistenceUnitName}") private String persistenceUnitName; @SuppressWarnings("unchecked") public GenericDao() { this.persistentClass = (Class<E>) ((ParameterizedType) getClass() .getGenericSuperclass()).getActualTypeArguments()[0]; } protected Class<E> getEntityClass() { return persistentClass; } protected EntityManager getEntityManager(){ return em; } public E merge(E entity) { E e = null; try{ e = em.merge(entity); em.flush(); }catch (Exception ex) { System.out.println("Exception occured at : " + ex); ex.printStackTrace(); } return e; } public void persist(E entity) { em.persist(entity); } public void remove(E entity) { em.remove(entity); } public E findById(ID id) { return em.find(getEntityClass(), id); } @SuppressWarnings("unchecked") public List<E> executeNamedQuery(String queryName, Map<String, Object> parameterMap) { Query query = em.createNamedQuery( queryName); if (parameterMap != null) { for (String param : parameterMap.keySet()) { query.setParameter(param, parameterMap.get(param)); } } return query.getResultList(); } public List<E> executeNamedQuery(String queryName) { return executeNamedQuery(queryName, null); } @SuppressWarnings("unchecked") public int getCount(String countField, Expression expr) { ReportQuery query = new ReportQuery(getEntityClass(), null); query.setSelectionCriteria(expr); query.addCount("count", query.getExpressionBuilder().get(countField) .distinct()); List<ReportQueryResult> result = (List<ReportQueryResult>) getSession().executeQuery(query); ReportQueryResult reportQueryResult = result.get(0); BigDecimal count = (BigDecimal) reportQueryResult.getResults().get(0); return count.intValueExact(); } protected Session getSession() { //EntityManagerImpl has to be imported as org.eclipse.persistence.internal.jpa.EntityManagerImpl Session session = ((EntityManagerImpl) em).getActiveSession(); return session; } public List<E> executeReadAllQuery(ReadAllQuery readAllQuery, int first, int rows) { readAllQuery.setFirstResult(first); readAllQuery.setMaxRows(first + rows); return executeDatabaseQuery(readAllQuery); } @SuppressWarnings("unchecked") public List<E> executeDatabaseQuery(DatabaseQuery q) { List<E> resultList = (List<E>) getSession().executeQuery(q); return resultList; } public int deleteById(ID id) { // TODO Auto-generated method stub return 0; } }

时出现this异常

1 个答案:

答案 0 :(得分：0)

如果您在EclipseLink and JOTM上使用Tomcat，那么在persistence.xml中，我猜您忘记了property：

    <properties>

        <property name="eclipselink.target-server" value="org.eclipse.persistence.transaction.jotm.JotmTransactionController"/>

    </properties>
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