FeignClientAutoConfiguration

org.springframework.cloud.sleuth.instrument.web.client.feign.TraceFeignClientAutoConfiguration

/**
* {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration
* Auto-configuration} enables span information propagation when using Feign.
*
* @author Marcin Grzejszczak
* @since 1.0.0
*/
@Configuration
@ConditionalOnProperty(value = "spring.sleuth.feign.enabled", matchIfMissing = true)
@ConditionalOnClass(Client.class)
@ConditionalOnBean(Tracer.class)
@AutoConfigureBefore(FeignAutoConfiguration.class)
@AutoConfigureAfter({SleuthHystrixAutoConfiguration.class, TraceWebAutoConfiguration.class})
public class TraceFeignClientAutoConfiguration {

   @Bean
   @Scope("prototype")
   @ConditionalOnClass(name = "com.netflix.hystrix.HystrixCommand")
   @ConditionalOnProperty(name = "feign.hystrix.enabled", matchIfMissing = true)
   Feign.Builder feignHystrixBuilder(BeanFactory beanFactory) {
       return SleuthHystrixFeignBuilder.builder(beanFactory);
   }

   @Bean
   @ConditionalOnMissingBean
   @Scope("prototype")
   @ConditionalOnProperty(name = "feign.hystrix.enabled", havingValue = "false", matchIfMissing = false)
   Feign.Builder feignBuilder(BeanFactory beanFactory) {
       return SleuthFeignBuilder.builder(beanFactory);
   }

   @Configuration
   @ConditionalOnProperty(name = "spring.sleuth.feign.processor.enabled", matchIfMissing = true)
   protected static class FeignBeanPostProcessorConfiguration {

       @Bean
       FeignBeanPostProcessor feignBeanPostProcessor(TraceFeignObjectWrapper traceFeignObjectWrapper) {
           return new FeignBeanPostProcessor(traceFeignObjectWrapper);
       }

       @Bean
       FeignContextBeanPostProcessor feignContextBeanPostProcessor(BeanFactory beanFactory) {
           return new FeignContextBeanPostProcessor(beanFactory);
       }
   }

   @Bean
   TraceFeignObjectWrapper traceFeignObjectWrapper(BeanFactory beanFactory) {
       return new TraceFeignObjectWrapper(beanFactory);
   }
}

org.springframework.cloud.netflix.feign.FeignClientsConfiguration\

@Configuration
public class FeignClientsConfiguration {

org.springframework.cloud.netflix.feign.FeignAutoConfiguration

@Configuration
@ConditionalOnClass(Feign.class)
public class FeignAutoConfiguration {

来源：oschina

链接：https://my.oschina.net/u/866802/blog/3034510

标签

hystrix

Spring

Prototype