制作Spring 3 MVC控制器方法Transactional

问题描述

然而，在一个特殊情况下，为了避免一个懒惰的初始化异常，我必须使用Spring 3.1和我的DAO和服务层（事务）一个spring mvc请求处理器方法@transactional。但它没有将交易附加到该方法。方法名称是ModelAndView home（HttpServletRequest请求，HttpServletResponse响应）。

从这个链接看来，不可能将事务（默认）附加到mvc方法。在该链接中建议的解决方案似乎是为Spring 2.5（重写handleRequest）。任何帮助将得到真正的赞赏。谢谢

  @Controller 
 public class AuthenticationController {
 @Autowired 
 CategoryService categoryService; 
 @Autowired 
 BrandService brandService; 
 @Autowired 
 ItemService itemService; 
 
 @RequestMapping（value =/ login.html，method = RequestMethod.GET）
 ModelAndView login（）{
返回新的ModelAndView（login.jsp）; 
} 
 @RequestMapping（value =/ home.html，method = RequestMethod.GET）
 @Transactional 
 ModelAndView home（HttpServletRequest请求，HttpServletResponse响应）{
列出<类别> categories = categoryService.readAll（）; 
 request.setAttribute（categories，categories）; 
列表<品牌>品牌= brandService.readAll（）; 
 request.setAttribute（品牌，品牌）; 
列表<项目> items = itemService.readAll（）; 
 request.setAttribute（items，items）; 
设置<图片> images = items.get（0）.getImages（）; 
（Image i：images）{
 System.out.println（i.getUrl（））; 
} 
返回新的ModelAndView（home.jsp）; 
 
  

解决方案

您需要执行一个接口，以便Spring可以使用它作为代理接口：

  @Controller 
 public interface AuthenticationController {
 ModelAndView home（HttpServletRequest请求，HttpServletResponse响应）; 
} 
 
 @Controller 
 public class AuthenticationControllerImpl implements AuthenticationController {
 
 @RequestMapping（value =/ home.html，method = RequestMethod.GET ）
 @Transactional 
 @Override 
 ModelAndView home（HttpServletRequest请求，HttpServletResponse响应）{
 ..... 
} 
} 
  

I am using Spring 3.1 and have my DAO and service layer(transactional) written.

However in a special case to avoid a lazy init exception I have to make a spring mvc request handler method @transactional. But It is failing to attach transaction to that method. Method name is ModelAndView home(HttpServletRequest request, HttpServletResponse response).http://forum.springsource.org/showthread.php?46814-Transaction-in-MVC-ControllerFrom this link it seems it is not possible to attach transaction (by default ) to mvc methods. Solution suggested in that link seems to be for Spring 2.5 (overriding handleRequest ). Any help will be reallyappreciated. Thanks

@Controller
public class AuthenticationController {
@Autowired
CategoryService categoryService;
@Autowired
BrandService brandService;
@Autowired
ItemService itemService;

@RequestMapping(value="/login.html",method=RequestMethod.GET)
ModelAndView login(){
    return new ModelAndView("login.jsp");
}
@RequestMapping(value="/home.html",method=RequestMethod.GET)
@Transactional
ModelAndView home(HttpServletRequest request, HttpServletResponse response){
    List<Category> categories = categoryService.readAll();
    request.setAttribute("categories", categories);
    List<Brand> brands = brandService.readAll();
    request.setAttribute("brands", brands);
    List<Item> items = itemService.readAll();
    request.setAttribute("items", items);
    Set<Image> images = items.get(0).getImages();
    for(Image i : images ) {
        System.out.println(i.getUrl());
    }
    return new ModelAndView("home.jsp");
}

解决方案

You'll need to implement an interface so that Spring has something it can use as a Proxy interface:

@Controller
public interface AuthenticationController {
  ModelAndView home(HttpServletRequest request, HttpServletResponse response);
}

@Controller
public class AuthenticationControllerImpl implements AuthenticationController {

@RequestMapping(value="/home.html",method=RequestMethod.GET)
@Transactional
@Override
ModelAndView home(HttpServletRequest request, HttpServletResponse response){
.....
}
}

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