聊聊不同集群的微服务如何通过feign调用

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Documented
@Import(LybGeekFeignClientsRegistrar.class)
public @interface EnableLybGeekFeignClients {

    /**
     * Alias for the {@link #basePackages()} attribute. Allows for more concise annotation
     * declarations e.g.: {@code @ComponentScan("org.my.pkg")} instead of
     * {@code @ComponentScan(basePackages="org.my.pkg")}.
     * @return the array of 'basePackages'.
     */
    String[] value() default {};

    /**
     * Base packages to scan for annotated components.
     * <p>
     * {@link #value()} is an alias for (and mutually exclusive with) this attribute.
     * <p>
     * Use {@link #basePackageClasses()} for a type-safe alternative to String-based
     * package names.
     * @return the array of 'basePackages'.
     */
    String[] basePackages() default {};

    /**
     * Type-safe alternative to {@link #basePackages()} for specifying the packages to
     * scan for annotated components. The package of each class specified will be scanned.
     * <p>
     * Consider creating a special no-op marker class or interface in each package that
     * serves no purpose other than being referenced by this attribute.
     * @return the array of 'basePackageClasses'.
     */
    Class<?>[] basePackageClasses() default {};

    /**
     * A custom <code>@Configuration</code> for all feign clients. Can contain override
     * <code>@Bean</code> definition for the pieces that make up the client, for instance
     * {@link feign.codec.Decoder}, {@link feign.codec.Encoder}, {@link feign.Contract}.
     *
     * @return list of default configurations
     */
    Class<?>[] defaultConfiguration() default {};

    /**
     * List of classes annotated with @FeignClient. If not empty, disables classpath
     * scanning.
     * @return list of FeignClient classes
     */
    Class<?>[] clients() default {};
}

 @SneakyThrows
    private void registerFeignClient(BeanDefinitionRegistry registry,
                                     AnnotationMetadata annotationMetadata, Map<String, Object> attributes) {
        String className = annotationMetadata.getClassName();
        Class feignClientFactoryBeanClz = ClassUtils.forName("org.springframework.cloud.openfeign.FeignClientFactoryBean",Thread.currentThread().getContextClassLoader());
        String name = getName(attributes);
        String customUrl = getCustomUrl(getUrl(attributes),name);
        。。。省略其他代码
      
    }

    private String getCustomUrl(String url,String serviceName){
        if(StringUtils.hasText(url)){
            return url;
        }
        String gateWay = environment.getProperty("lybgeek.gateWayUrl");
        if(StringUtils.isEmpty(gateWay)){
            return url;
        }

        if(serviceName.startsWith("http://")){
            serviceName = StrUtil.trim(serviceName.replace("http://",""));
        }

        String customUrl = URLUtil.normalize(gateWay + "/" + serviceName);

        log.info("feign customed with new url:【{}】",customUrl);

        return customUrl;

    }

spring:
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
          lower-case-service-id: true

@SpringBootApplication
@EnableLybGeekFeignClients(basePackages = "com.github.lybgeek")
public class ConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConsumerApplication.class);
    }

}

logging:
  level:
    # feign调用所在的包
    com.github.lybgeek.api.feign: debug


feign:
  client:
    config:
      default:
        # 开启feign记录请求和响应的标题、正文和元数据
        loggerLevel: FULL

lybgeek:
  gateWayUrl: localhost:8000

@FeignClient(name = "${feign.instance.svc:provider}",url="${lybgeek.gateWayUrl: }/${feign.instance.svc:provider}",path = InstanceServiceFeign.PATH,contextId = "instance")