小编Nic*_*lie的帖子

我有这样的休眠过滤器：

@Entity
@FilterDef(name = "filter_name", parameters = { @ParamDef(name = "tenatId", type = "long") })
@Filter(name = "filter_name", condition = "tenant_id = :tenantId")
public class MyEntity {

   private long tenantId;

}

我想在每次请求到来时启用这个过滤器，所以我创建了这样的请求拦截器：

@Configuration
public class RequestInterceptor implements HandlerInterceptorAdapter {

    @PersistenceContext
    private EntityManager entityManager;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
        Object handler) throws Exception {
        Filter filter = entityManager.unwrap(Session.class).enableFilter("filter_name");
        filter.setParameter("tenantId", myService.getTentantId());
    }
}

但我无法使用事务管理器，出现错误：

java.lang.IllegalStateException: No transactional EntityManager available
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:272)
    at com.sun.proxy.$Proxy184.unwrap(Unknown Source)
    at id.gdplabs.koi.api.config.security.RequestInterceptor.preHandle(RequestInterceptor.java:27)
    at org.springframework.web.servlet.handler.WebRequestHandlerInterceptorAdapter.preHandle(WebRequestHandlerInterceptorAdapter.java:56)
    at org.springframework.web.servlet.HandlerExecutionChain.applyPreHandle(HandlerExecutionChain.java:134) …