【发布时间】：2016-11-12 18:04:05
【问题描述】：
我是 Spring 和 JPA 的新手，我遇到了 TransactionRequiredException 的问题。我尝试了位于here、here 和here 的提示（例如使用@Transactional 进行注释，手动启动事务等）
我的代码如下：
Goal.java
@Entity
@Table(name = "goals")
public class Goal
{
@Id
@GeneratedValue
@Column(name = "GOAL_ID")
private Long id;
@Range(min = 1, max = 120)
@Column(name = "MINUTES")
private int minutes;
public int getMinutes()
{
return minutes;
}
public void setMinutes(int minutes)
{
this.minutes = minutes;
}
public Long getId()
{
return id;
}
public void setId(Long id)
{
this.id = id;
}
}
GoalRepositoryImpl.java
@Repository("goalRepository")
@Transactional
public class GoalRepositoryImpl implements IGoalRepository
{
@PersistenceContext
private EntityManager em;
public Goal save(Goal goal)
{
em.persist(goal);
return goal;
}
}
GoalServiceImpl.java
@Service("goalService")
public class GoalServiceImpl implements IGoalService
{
@Autowired
private IGoalRepository goalRepository;
@Transactional
public Goal save(Goal goal)
{
return goalRepository.save(goal);
}
}
目标控制器
@Controller
@SessionAttributes("goal")
public class GoalController
{
@Autowired
private IGoalService goalService;
@RequestMapping(value = "/addGoal", method = RequestMethod.POST)
public String updateGoal(@Valid @ModelAttribute("goal") Goal goal, BindingResult result){
if (result.hasErrors()){
return "addGoal";
}else{
goalService.save(goal);
}
return "redirect:addMinutes.html";
}
}
jpaContext.xml
<?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:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="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
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:annotation-config/>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="punit" />
<property name="dataSource" ref="datasource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
</bean>
</property>
<property name="jpaPropertyMap">
<map>
<entry key="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
<entry key="hibernate.hbm2ddl.auto" value="create"/>
<entry key="hibernate.format_sql" value="true"/>
</map>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/fitness_tracker?autoReconnect=true"/>
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
Tomcat 日志
SEVERE: Servlet.service() for servlet [fitTrackerServlet] in context with path [] threw exception [Request processing failed; nested exception is javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call] with root cause
javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:282)
at com.sun.proxy.$Proxy41.persist(Unknown Source)
at ie.wit.repository.GoalRepositoryImpl.save(GoalRepositoryImpl.java:22)
at ie.wit.service.GoalServiceImpl.save(GoalServiceImpl.java:25)
at ie.wit.controller.GoalController.updateGoal(GoalController.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
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:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
【问题讨论】：
-
尝试从存储库中删除
@Transactional，看看是否有什么不同。您确实希望事务边界存在于服务级别而不是存储库级别，因为您可能希望多个存储库在单个事务中针对给定工作单元进行交互。 -
我试过了。仍然没有运气。我还在我的 jpaContext 中添加了一个
<context:component-scan base-package="ie.wit"/>，因为我认为这可能没有从我的 servlet-config 中获取。那也没用。 -
您可能正在处理遇到here的相同问题。
-
可能是个愚蠢的问题，但您使用的是哪个事务注释？ JPA 一还是 Spring 一？
-
实际上可能是这样，这是我没有检查过的一种方法。我现在不在我的开发机器前面。但我会调查的时候。