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JVic
Asked:2020-08-07 14:09:57 +0000 UTC2020-08-07 14:09:57 +0000 UTC

Spring如何将新对象添加到上下文中

  • 772

我有一个特定的过滤器可以检索并形成一个实体，UserState我怎样才能将此实体添加到上下文中，以便我可以在以下过滤器中使用它而不是重新形成它？或者还有其他一些在过滤器之间传递对象的做法吗？

public class AuthFilter extends ZuulFilter {

    @Autowired
    private AuthService authService;

    @Autowired
    private ApplicationContext appContext;

    @Override
    public String filterType() {
        return PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return PRE_DECORATION_FILTER_ORDER - 2;
    }

    @Override
    public boolean shouldFilter() {
        RequestContext context = RequestContext.getCurrentContext();
        String requestURI = context.getRequest().getRequestURI();
        for (String authPath : authPaths) {
            if (requestURI.contains(authPath)) return true;
        }
        return false;
    }

    @Override
    public Object run() throws ZuulException {

        try {
            UserState userState = authService.getUserData();

            DefaultListableBeanFactory context = new DefaultListableBeanFactory();

            GenericBeanDefinition beanDefinition = new GenericBeanDefinition();
            beanDefinition.setBeanClass(UserState.class);
            beanDefinition.setPropertyValues(new MutablePropertyValues() {
                {
                    add("user", userState);
                }
            });
            context.registerBeanDefinition("userState", beanDefinition);
        } catch (UndeclaredThrowableException e) {
            if (e.getUndeclaredThrowable().getClass() == UnauthorizedException.class) {
                throw new UnauthorizedException(e.getMessage());
            }

            if (e.getUndeclaredThrowable().getClass() == ForbiddenException.class) {
                throw new ForbiddenException(e.getMessage(), "The user is not allowed to make this request");
            }
        }

        return null;
    }
}
spring

1 个回答

  1. Best Answer

    无需直接使用上下文。您可以在 Spring 的摆布下进行创作，并且仅将其填充到过滤器中。或者创建一个带有弹簧的对象 - 对象的存储，并在过滤器中将必要的对象放入其中。如果它需要绑定到会话，则通过会话 bean 工作。

    public class UserStateHolder {

    UserState userState; 

    public UserState getUserState() {
        return this.userState;
    }

    public void setUserState(UserState userState) {
        this.userState = userState;;
    }

}

@Component
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public class MySessionProxy {

    private UserStateHolder userStateHolder = new UserStateHolder();

    public UserStateHolder getUserStateHolder() {
        return userStateHolder;
    }

}

public class AuthFilter extends ZuulFilter {

    @Autowired
    private MySessionProxy mySessionProxy;
....................................................
    @Override
    public Object run() throws ZuulException {
         .................................
         mySessionProxy.getUserStateHolder().setUserState(userState);
    }
}
    • 1

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