[英]spring mvc + jpa + hibernate + transaction issue
我似乎無法在Spring MVC中使用注入的Entitymgr將數據持久保存在數據庫中。 我已經看到多個類似的問題(例如EntityManager無法使用persist將元素保存到數據庫 ),但是似乎沒有任何答案可以解決我的問題。 這是我的配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- datasource -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close"
p:driverClassName="${driver}"
p:url="${url}"
p:username="contact" p:password="contact" />
<context:property-placeholder location="classpath:jdbc.properties" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
p:dataSource-ref="dataSource"
p:packagesToScan="com.rd.web"> <!-- scans for entities (model) -->
<property name="persistenceProvider">
<bean class="org.hibernate.ejb.HibernatePersistence" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQL5Dialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="entityManagerFactory" />
<tx:annotation-driven transaction-manager="transactionManager"/>
<context:component-scan base-package="com.rd.web" />
<bean id="contactService" class="com.rd.web.service.ContactServiceImpl"/>
</beans>
我有以下代碼(位於Web控制器中,但當前已移至服務進行測試):
TEST_CASE1(使用春季交易):
@Transactional
public Contact setContact(Contact c){
if(c.getId() == null){
getEMgr().persist(c);
}else{
getEMgr().merge(c);
}
return c;
}
==>沒有錯誤,只是不插入實體,日志中也沒有插入語句。
TEST_CASE2(使用春季交易):
@Transactional
public Contact setContact(Contact c){
if(c.getId() == null){
getEMgr().persist(c);
}else{
getEMgr().merge(c);
}
getEMgr().flush();
return c;
}
==>我得到異常:沒有事務在進行中
TEST_CASE3:
public Contact setContact(Contact c){
getEMgr().getTransaction().begin();
try{
if(c.getId() == null){
getEMgr().persist(c);
}else{
getEMgr().merge(c);
}
getEMgr().flush();
getEMgr().getTransaction().commit();
return c;
}catch(Throwable t){
getEMgr().getTransaction().setRollbackOnly();
}
return null;
}
==>引發錯誤:java.lang.IllegalStateException:不允許在共享EntityManager上創建事務-使用Spring事務或EJB CMT代替
由於該操作是公共的,並且是從另一個組件(在其中注入了服務)調用的,所以它不應是spring AOP問題。 同樣,appcontext將事務定義為注釋驅動程序。 我真的不明白為什么我的交易沒有開始。
當我使用相同的applicationcontext.xml並僅觸發一個用於加載contactservice並創建聯系人的測試類時,該聯系人將被正確保存。
另外,我在web.xml中添加了以下過濾器,但無濟於事:
<filter>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
任何提示將不勝感激。 干杯。
添加了一些額外的信息:
@Muel,使用persistencecontext注入了Entitymgr:
@Transactional
@Service(“ contactService”)公共類ContactServiceImpl實現IContactService {
// @Autowired //私人IEntityMgrProvider eMgrPovider;
@PersistenceContext EntityManager eMgr;
@Transactional
public Contact getContactByID(long id) {
return getEMgr().find(Contact.class, id);
}
@Transactional
public List<Contact> getAllContacts() {
TypedQuery<Contact> qry = getEMgr().createNamedQuery("findAll", Contact.class);
return qry.getResultList();
}
@Transactional
public Contact setContact(Contact c){
if(c.getId() == null){
getEMgr().persist(c);
// getEMgr().flush();
}else{
getEMgr().merge(c);
}
return c;
}
@Transactional(readOnly=true)
public void deleteContact(long id){
getEMgr().remove(getEMgr().find(Contact.class, id));
}
private EntityManager getEMgr(){
// return eMgrPovider.getEMgr();
return eMgr;
}
public static void main(String[] args) {
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("appctx.xml");
IContactService contactService = ctx.getBean("contactService", IContactService.class);
Contact c= new Contact();
c.setBirthDate(new Date());
c.setFirstName("P1");
c.setLastName("P2");
ContactTelDetail tel = new ContactTelDetail();
tel.setContact(c);
tel.setTelNumber("056776650");
tel.setTelType("landline");
c = contactService.setContact(c);
System.out.println(c.getId());
}
}
我意識到此getEmgr()方法不是必需的,但最初eMgr來自其他地方(也已注入,但暫時不要緊記),順便說一句,當我運行main方法時,我實際上可以插入Contact ...
@ user2264997這是我的servlet上下文:
<?xml version="1.0" encoding="UTF-8"?>
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd“>
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
我只添加了最后兩個過濾器進行測試。 我不認為這是必需的(似乎最后一個過濾器僅用於支持延遲加載等,但是無論如何都嘗試過...)
@馬丁·弗雷
我將調查您可能會遇到的問題。
@ mdeinum.wordpress.com
使用@autowired將服務注入到webcontroller中。 服務實現和web.xml參見上文。 調度程序servlet的配置文件(盡管它似乎沒有相關信息,但是可能是問題所在;)):
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- use this dispatcher servlet for root -->
<!-- <default-servlet-handler/> -->
<resources location="/, classpath:/META-INF/web-resources/" mapping="/resources/**"/>
<interceptors>
<beans:bean class="org.springframework.web.servlet.theme.ThemeChangeInterceptor"/>
<beans:bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"
p:paramName="lang"/>
</interceptors>
<beans:bean
class="org.springframework.ui.context.support.ResourceBundleThemeSource"
id="themeSource" />
<beans:bean class="org.springframework.web.servlet.theme.CookieThemeResolver"
id="themeResolver" p:cookieName="theme" p:defaultThemeName="standard" />
<beans:bean
class="org.springframework.context.support.ReloadableResourceBundleMessageSource"
id="messageSource" p:basenames="WEB-INF/i18n/messages,WEB-INF/i18n/application"
p:fallbackToSystemLocale="false" />
<beans:bean class="org.springframework.web.servlet.i18n.CookieLocaleResolver"
id="localeResolver" p:cookieName="locale"/>
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<!-- <resources location="/resources/" mapping="/resources/**" /> -->
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<!-- now using tiles in stead ==> different view resolver -->
<!-- <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> -->
<!-- <beans:property name="prefix" value="/WEB-INF/views/" /> -->
<!-- <beans:property name="suffix" value=".jsp" /> -->
<!-- </beans:bean> -->
<context:component-scan base-package="com.rd.web" />
<!-- Add the following beans -->
<!-- Tiles Configuration -->
<beans:bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"
id="tilesViewResolver">
<beans:property name="viewClass"
value="org.springframework.web.servlet.view.tiles2.TilesView" />
</beans:bean>
<beans:bean
class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"
id="tilesConfigurer">
<beans:property name="definitions">
<beans:list>
<beans:value>/WEB-INF/layouts/layouts.xml</beans:value>
<!-- Scan views directory for Tiles configurations -->
<beans:value>/WEB-INF/views/**/views.xml</beans:value>
</beans:list>
</beans:property>
</beans:bean>
</beans:beans>
我將嘗試配置休眠適配器,並讓您知道它的運行方式...
干杯
您將在applicationContext.xml和servlet-context.xml中復制組件掃描。
<context:component-scan base-package="com.rd.web" />
當您執行此操作時,控制器將注入由servlet-context.xml中沒有事務的組件掃描所選擇的服務。
要么在servlet-context.xml中顯式為基本軟件包指定控制器軟件包,要么在applicatioContext.xml中為基本軟件包指定非控制器軟件包。
或在組件掃描聲明中使用排除/包含過濾器。
applicationContext.xml
<context:component-scan ..>
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
...
在servlet-context.xml中
<context:component-scan ..>
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
...
好吧,因此在根應用程序上下文和無視Servlet應用程序上下文中定義組件掃描確實存在問題。 我將控制器移到一個單獨的程序包,僅在應用程序上下文中掃描了該程序包中的調度程序servlet,現在一切正常!
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