io.opentracing.contrib.spring.cloud.feign.FeignTracingAutoConfiguration Maven / Gradle / Ivy
/**
* Copyright 2017-2018 The OpenTracing Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package io.opentracing.contrib.spring.cloud.feign;
import feign.Client;
import feign.Request;
import feign.opentracing.FeignSpanDecorator;
import feign.opentracing.TracingClient;
import feign.opentracing.hystrix.TracingConcurrencyStrategy;
import io.opentracing.Tracer;
import io.opentracing.contrib.spring.tracer.configuration.TracerAutoConfiguration;
import java.util.List;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.cloud.openfeign.FeignAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Lazy;
/**
* @author Pavol Loffay
* @author Eddú Meléndez
*/
@Configuration
@ConditionalOnClass(Client.class)
@ConditionalOnBean(Tracer.class)
@AutoConfigureAfter(TracerAutoConfiguration.class)
@AutoConfigureBefore(FeignAutoConfiguration.class)
@ConditionalOnProperty(name = "opentracing.spring.cloud.feign.enabled", havingValue = "true", matchIfMissing = true)
public class FeignTracingAutoConfiguration {
@Autowired
@Lazy
private Tracer tracer;
@Autowired(required = false)
@Lazy
private List spanDecorators;
@Bean
FeignContextBeanPostProcessor feignContextBeanPostProcessor(BeanFactory beanFactory) {
return new FeignContextBeanPostProcessor(tracer, beanFactory, spanDecorators);
}
@Configuration
@ConditionalOnClass(name = {"com.netflix.hystrix.HystrixCommand", "feign.hystrix.HystrixFeign"})
@ConditionalOnProperty(name = "feign.hystrix.enabled", havingValue = "true")
public static class HystrixFeign {
@Autowired
public HystrixFeign(Tracer tracer) {
TracingConcurrencyStrategy.register(tracer);
}
}
@Bean
public TracingAspect tracingAspect() {
return new TracingAspect();
}
/**
* Trace feign clients created manually
*/
@Aspect
class TracingAspect {
@Around("execution (* feign.Client.*(..)) && !within(is(FinalType))")
public Object feignClientWasCalled(final ProceedingJoinPoint pjp) throws Throwable {
Object bean = pjp.getTarget();
if (!(bean instanceof TracingClient)) {
Object[] args = pjp.getArgs();
return new TracingClientBuilder((Client) bean, tracer)
.withFeignSpanDecorators(spanDecorators)
.build()
.execute((Request) args[0], (Request.Options) args[1]);
}
return pjp.proceed();
}
}
}