Apache CXF处理枚举路径变量错误并返回自定义响应

时间:2018-12-11 09:50:56

标签: java-ee jboss cxf

我将路径变量作为枚举。如果productType的值无效,则会在JBoss上部署HTML错误页面,该页面带有stacktraces。我想做的是处理此错误,并返回一个标准的GenericApiResponse JSON对象。

@Path("product")
@Produces({ APPLICATION_JSON })
public class ProductEndpoint {

    @GET
    @Path("/{productType}/info")
    public GenericApiResponse info(@PathParam("productType") ProductType productType) {
        // Get product info and return
    }


}

枚举类:

public enum ProductType {

    GLOBAL,
    INTERNAL

    public static ProductType fromString(String value) {
        for(ProductType t : ProductType.class.getEnumConstants()) {
            if(t.name().toLowerCase().equals(value)) {
                return t;
            }
        }

        throw new InvalidProductTypeException();
    }
}

HTML stacktrace(无用)

JBWEB000071: root cause

java.lang.NoSuchMethodError: javax.ws.rs.core.Response.hasEntity()Z
    org.apache.cxf.jaxrs.utils.ExceptionUtils.convertFaultToResponse(ExceptionUtils.java:67)
    org.apache.cxf.jaxrs.utils.JAXRSUtils.convertFaultToResponse(JAXRSUtils.java:1516)
    org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.convertExceptionToResponseIfPossible(JAXRSInInterceptor.java:261)
    org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.handleMessage(JAXRSInInterceptor.java:92)
    org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:272)
    org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
    org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:241)
    org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:248)
    org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:222)
    org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:153)
    org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:171)
    org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:286)
    org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:211)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
    org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:262)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

因此,我尝试制作自己的ExceptionMapper仅此方法无效。永远不会调用我的班级,并且仍会显示HTML错误页面。

InvalidProductTypeExceptionMapper.java

@Provider
@Produces(MediaType.APPLICATION_JSON)
public class InvalidProductTypeExceptionMapper implements ExceptionMapper<InvalidProductTypeException> {

    @Override
    public Response toResponse(InvalidProductTypeExceptione) {
        // This is never being called
        return Response.status(Response.Status.OK)
                .entity(new GenericApiResponse(ResultCode.INVALID_PARAMETERS))
                .build();
    }

}

cxf.xml

<jaxrs:providers>
    <bean class="com.my.mapper.InvalidProductTypeExceptionMapper "/>
</jaxrs:providers>

我的问题:如何处理此类错误并返回自定义响应?

1 个答案:

答案 0 :(得分:0)

我不认为在您的枚举类中添加fromString方法在CXF中没有任何作用。

要进行转换,请考虑使用ParamConverter和ParamConverterProvider:

    public class ProductTypeConverter implements ParamConverter<ProductType> {

        @Override
        public ProductType fromString(String value) {
            // throw your exception here.
            ...
        }

        @Override
        public String toString(ProductType value) {
            ...
        }
    }

然后添加

    @Provider
    public class MyParamConverterProvider implements ParamConverterProvider{
        @Override
        public <T> ParamConverter<T> getConverter(Class<T> rawType, Type genericType, Annotation[] annotations) {
            if(rawType.equals(ProductType.class)) {
                return (ParamConverter<T>) new ProductTypeConverter();
            }
            return null;
        }
    }

将提供程序与ExceptionMapper一起添加到端点。它应该为您带来所需的结果。