使 Spring 3 MVC 控制器方法事务性 [英] Making Spring 3 MVC controller method Transactional

问题描述

我正在使用 Spring 3.1 并编写了我的 DAO 和服务层(事务层).

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

但是在特殊情况下，为了避免延迟初始化异常，我必须创建一个 spring mvc 请求处理程序方法 @transactional.但是它无法将事务附加到该方法.方法名称是 ModelAndView home(HttpServletRequest request, HttpServletResponse response).http://forum.springsource.org/showthread.php?46814-Transaction-in-MVC-Controller从这个链接看来，不可能将事务(默认情况下)附加到 mvc 方法.该链接中建议的解决方案似乎适用于 Spring 2.5(覆盖 handleRequest ).任何帮助将不胜感激.谢谢

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-Controller From 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");    
}

推荐答案

您需要实现一个接口，以便 Spring 可以将其用作代理接口:

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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