@上下文注入在Jersey ContainerRequestFilter（Dropwizard）中不工作

Question

public class ApplicationIPAuthFilter implements ContainerRequestFilter {

    private static final Logger LOGGER = LoggerFactory.getLogger(ApplicationIPAuthFilter.class);
    private HerculesRestAccessor restAccessor;
    private String applicationName;

    @Context
    private HttpServletRequest httpServletRequest;

    public ApplicationIPAuthFilter(){
    }

    public ApplicationIPAuthFilter(HerculesRestAccessor accessor, String applicationName) {
        restAccessor = accessor;
        this.applicationName = applicationName;
    }

    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException {
        // need remote Ip
        String remoteIp = this.httpServletRequest.getRemoteAddr();
        ....
    }
}

@Provider
public class ApplicationIPAuthFeature implements DynamicFeature {

    private final HerculesRestAccessor accessor;
    private final String applicationName;

    public ApplicationIPAuthFeature(HerculesRestAccessor accessor, String applicationName) {

        this.accessor = accessor;
        this.applicationName = applicationName;
    }

    @Override
    public void configure(ResourceInfo resourceInfo, FeatureContext context) {
        if (resourceInfo.getResourceMethod().getAnnotation(ApplicationIPAuthRequired.class) != null) {

            // not working
            context.register(new ApplicationIPAuthFilter(accessor, applicationName));

             //@Context injection works in ContainerRequestFilter for classes
            //context.register(ApplicationIPAuthFilter.class);
        }
    }
}

我怎么解决这个...需要帮助吗？

Answer 1

这是DynamicFeature的一个已知问题。注册为对象时，注射不起作用。

你可以做的一件事是手动注入它，就像在这篇文章中提到的。

您可以做的另一件事是使HerculesRestAccessor和ApplicationName可插入。或者使应用程序名称可注入,您可以使其成为配置属性并注入配置。如果您这样做了，那么您就可以将过滤器注册为类，并且所有的注入都应该工作。