【发布时间】:2016-10-28 22:00:39
【问题描述】:
我正在尝试在@ServerEndpoint 类中注入由@Repository 类注释的。但是当我试图调用存储库方法时,它返回 null。从这个包中注入的另一个 bean 工作正常。
@ApplicationScoped
@ServerEndpoint("/WebsocketHome/actions")
public class WebSocketServer {
private static final Logger LOG = Logger.getLogger(WebSocketServer.class);
@Inject
private SessionHandler sessionHandler;
@Inject
private PlaceRepository placeRepository;
@OnMessage
public void handleMessage(String message, Session session) {
JSONParser jsonParser = new JSONParser();
try {
JSONObject jsonObject = (JSONObject) jsonParser.parse(message);
if ("getRooms".equals(jsonObject.get("action"))) {
List<Place> places = this.placeRepository.getAllPlaces(); //error is here
}
} catch (ParseException e) {
LOG.error(e.getMessage());
}
.....
这是存储库类:
@Repository
@Transactional
public class PlaceRepository {
@Autowired
private SessionFactory sessionFactory;
@SuppressWarnings("unchecked")
public List<Place> getAllPlaces() {
return this.sessionFactory.getCurrentSession().createQuery("from Place place").list();
}
}
web.xml:
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/application-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<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>
</web-app>
应用上下文.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:tx="http://www.springframework.org/schema/tx"
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/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:application.properties" system-properties-mode="ENVIRONMENT"/>
<context:component-scan base-package="com.hms.repository"/>
<context:component-scan base-package="com.hms.utils"/>
<tx:annotation-driven transaction-manager="txManager"/>
<import resource="security-context.xml"/>
<bean id="txManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.driverClassName}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
<!--
<property name="initialSize" value="5" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
<property name="minIdle" value="2" />
-->
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:hibernate.cfg.xml"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${db.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hbm2ddl.auto">${db.hbm2ddl.auto}</prop>
</props>
</property>
</bean>
</beans>
错误仅在调用@OnMessage 方法时出现。 存储库类的所有 junit @Tests 都返回良好的结果。 我的代码有什么问题? 对不起我的英语。
更新:
看来,这个问题出在 SessionFactory 依赖中,因为我在@Repository 中添加了测试方法:
public String testWS() {
return "Test is ok!";
}
返回很好的结果。
【问题讨论】:
-
你能提供你的配置吗?最初的想法是问题在于在您的课程上使用事务注释。当您使用 @Transactional 时,spring 将提供一个代理并假设您没有使用 CGLIB,JDK 动态代理将与您的具体 PlaceRepository 不兼容
-
按照您的要求,我包含配置文件。
标签: java spring-mvc websocket