如何解决Fortify竞赛条件:Singleton Member Field问题 [英] How to fix Fortify Race Condition: Singleton Member Field issue

问题描述

我遇到问题. 我们在我的项目中使用Spring MVC框架，但是Spring MVC的默认Controller是Singleton Model. 我通过会话更改Controller使用@Scope("session")以避免出现竞争状况问题(每个人都有自己的Controller).

I encounter a problem. we use Spring MVC framework in my Project,but Spring MVC default Controller is Singleton Model. I change Controller use @Scope("session") by session to avoid race Condition problem(everyone has own Controller).

@Controller
@Scope("session")
public class AP0Controller extends BaseController {

    @Autowired
    GnRecService gnRecService;

    Integer seq = null;//Global variable

    @RequestMapping(value = "/agn/AP1W01A_004", method=RequestMethod.GET)
    public ModelAndView welcomeGrid(@RequestParam("payType")String payType){
        seq = gnRecService.findTheLastPK(payType);
        ModelAndView view = new ModelAndView(".agn.AP1W01A_004");
        return view;
    }

    public ModelAndView showPk() {
        seq +=2; 
        ModelAndView view = new ModelAndView(".agn.AP1W01A_004");
        view.addObject("seq",seq)
        return view;
    }

}

由HP Fortify扫描后，报告指出这将导致竞态. 如何解决并解决问题?

After Scanned By HP Fortify,the report indicated this will cause Race Condition. How can I fix it and pass the issue?

seq +=2;//Race Condition: Singleton Member Field

推荐答案

请尝试重新设计控制器，使其不放入状态. 另外，您可以考虑使用AtomicInteger

Try do redesign your controller to not put state in it. Alternatively you can think about using AtomicInteger

AtomicInteger seq = new AtomicInteger();//Global variable

@RequestMapping(value = "/agn/AP1W01A_004", method=RequestMethod.GET)
    public ModelAndView welcomeGrid(@RequestParam("payType")String payType){
        seq.set(gnRecService.findTheLastPK(payType));
        ModelAndView view = new ModelAndView(".agn.AP1W01A_004");
        return view;
    }

    public ModelAndView showPk() {
        final int localSeq = seq.addAndGet(2); 
        ModelAndView view = new ModelAndView(".agn.AP1W01A_004");
        view.addObject("seq",localSeq)
        return view;
    }

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