当我启动我的应用程序并从我的控制器调用服务时，我得到了 No session found 异常。但是，我可以从单元测试中成功调用相同的服务。
当我在控制器类上调用 userService.userExists(username) 方法时，就会发生这种情况。我开始在调试器中跟踪执行，发现 TransactionSynchronizationManager 资源对象映射为空，即使我将服务装饰为事务性的。但是，当我从单元测试调用服务时，TransactionSynchronizationManager 上有资源。
控制器类：
@Controller
public class DiaryController {
@Autowired
private UserService userService;
@RequestMapping(method = RequestMethod.GET, value = "/diary/{username}")
public String home(@PathVariable String username, ModelMap model) {
String authUser = SecurityContextHolder.getContext().getAuthentication().getName();
if(authUser.equals(username)) {
model.addAttribute("message", "Hey there. How's it going " + username + "?");
}
else if (userService.userExists(username)) {
model.addAttribute("message", "You're looking at diary for " + username + ".");
}
else {
model.addAttribute("message", "User " + username + " does not exist.");
}
return "diary";
}
}
休眠上下文：
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:database.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.user}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingLocations">
<list>
<value>classpath*:hbm/User.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
应用上下文：
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<mvc:annotation-driven/>
<mvc:resources mapping="/resources/**" location="/resources/"/>
UserDoaImpl：
@Repository
public class UserDaoImpl extends AbstractDaoImpl<User, String> implements UserDao {
protected UserDaoImpl() {
super(User.class);
}
@Override
public void saveUser(User user) {
saveOrUpdate(user);
}
@Override
public List<User> findUsers(String username) {
return findByCriteria(Restrictions.like("username", username, MatchMode.EXACT));
}
@Override
public boolean exists(String username) {
return findById(username) != null;
}
}
我的工作单元测试：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {
"classpath:/spring/applicationContext.xml",
"classpath:/spring/securityContext.xml",
"classpath:/spring/hibernateContext.xml"
})
public class UserServiceTest {
@Autowired
private UserService userService;
@Test
public void userServiceTest() {
Assert.assertTrue(userService.userExists("fergal"));
}
}
用户服务实现：
@Service("userService")
@Transactional(readOnly = true)
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public User findByUserName(String userName) {
return userDao.findById(userName);
}
@Override
@Transactional(readOnly = false)
public void saveUser(User user) {
userDao.saveUser(user);
}
@Override
@Transactional(readOnly = false)
public void deleteUser(String userName) {
User user = userDao.findById(userName);
if (user != null) {
userDao.delete(user);
}
}
@Override
public List<User> findUsers(String user) {
return userDao.findUsers(user);
}
@Override
public boolean userExists(String username) {
return userDao.exists(username);
}
web.xml
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>MyApp</display-name>
<servlet>
<servlet-name>myapp-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring/applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>myapp-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring/**</param-value>
</context-param>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>