Spring Cloud Gateway 过滤器排序

Question

我正在使用 Spring Cloud Gateway 过滤器，并且想要按 过滤请求GatewayFilterFactory，但订单无法与@Order注释一起使用

我尝试交换过滤器的顺序，但不起作用。

@Slf4j
@Order(1)
@Component
public class AccessFilter implements GatewayFilterFactory<AccessFilter.Config> {

    @Override
    public GatewayFilter apply(AccessFilter.Config config) {
        return (exchange, chain) -> { 
           log.info("in AccessFilter second");
           // do something
        }
    }
}

@Order(-1)
@Slf4j
@Component
public class AddTraceIdGlobalFilter implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("in globalfilter first");
        // do something
    }

}

我的 yaml 文件：

spring:
  cloud:
    gateway:
      routes:
      - id: user_1
        uri: http://user:8080
        predicates:
        - Path=/v1/user/info
        filters:
        - AccessFilter

我期望的输出：

in globalfilter first
in AccessFilter second

但实际输出：

in AccessFilter second
in globalfilter first

Answer 1

GatewayFilterFactory 无法应用@Order或Ordered。你必须使用OrderedGatewayFilter.

@Component
public class AccessFilter implements GatewayFilterFactory<AccessFilter.Config> {

    @Override
    public GatewayFilter apply(AccessFilter.Config config) {
        return new OrderedGatewayFilter((exchange, chain) -> { 
           log.info("in AccessFilter second");
           // do something
        }, 1)
    }
}