Question

我正在使用spring Propagation.REQUIRED更新数据库中的行，它第一次正常更新，但第二次抛出异常。

03:44:58,206 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/wad].[springMain]] (http--127.0.0.1-8080-1) Servlet.service() for servle
t springMain threw exception: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect
): [com.guthyrenker.wad.core.model.lookup.PublisherLookupItem#4025]
        at org.hibernate.event.internal.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:492) [hibernate-core-4.0.1.Final.jar:4.0.1.Fin
al]

代码：

@RequestMapping(value = "/admin/updatePublisher.htm", method = RequestMethod.POST, produces = "application/json")
public @ResponseBody
JsonDataWrapper<PublisherLookupItem> updatePublisher(@RequestBody("PublisherLookupItem") publisherLookupItem, HttpServletRequest request) throws Exception {

    wadRepository.updatePublisher(publisherLookupItem);
    JsonDataWrapper<PublisherLookupItem> result = new JsonDataWrapper<PublisherLookupItem>(publishertList);
    return result;
}

package com.wad.service
public interface WadRepository
{
    @Transactional(propagation = Propagation.REQUIRED)
    public PublisherLookupItem updatePublisher(PublisherLookupItem publisherLookupItem);
}

package com.wad.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.wad.core.dao.WadDAO;
import com.wad.core.model.lookup.PublisherLookupItem;
import com.wad.core.service.ServiceException;
import com.wad.core.service.WadRepository;

@Repository
public class WadRepositoryImpl implements WadRepository
{
    @Autowired
    private WadDAO wadDAO;

    @Override
    public PublisherLookupItem updatePublisher(PublisherLookupItem publisherLookupItem) {
        return wadDAO.savePublishers(publisherLookupItem);
    }
}

@Repository
public class WadDAO
{   
    public PublisherLookupItem savePublishers(PublisherLookupItem publisherLookupItem) {
        publisherLookupItem = em.merge(publisherLookupItem);
        return publisherLookupItem;
    }
}

Answer 1

在使用@RequestMapping注释的控制器中，您需要将wadRepository.updatePublisher(...)返回的实例放在JsonDataWrapper<PublisherLookupItem> result中。

从您的代码开始，您现在将在响应中返回PublisherLookupItem的陈旧实例，因此下次尝试合并该实例时会出现过时的对象异常。

更新的Jpa Transaction为第二次更新抛出异常

1 个答案: