org.springframework.cloud.sleuth.instrument.web.client.feign.TraceFeignAspect.java Source code

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Here is the source code for org.springframework.cloud.sleuth.instrument.web.client.feign.TraceFeignAspect.java

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/*
 * Copyright 2013-2017 the original author or 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 org.springframework.cloud.sleuth.instrument.web.client.feign;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.BeanFactory;

import feign.Client;
import feign.Request;

/**
 * Aspect for Feign clients so that you can autowire your custom components
 *
 * @author Marcin Grzejszczak
 * @since 1.1.2
 */
@Aspect
class TraceFeignAspect {

    private final BeanFactory beanFactory;

    TraceFeignAspect(BeanFactory beanFactory) {
        this.beanFactory = beanFactory;
    }

    @Around("execution (* feign.Client.*(..)) && !within(is(FinalType))")
    public Object feignClientWasCalled(final ProceedingJoinPoint pjp) throws Throwable {
        Object[] args = pjp.getArgs();
        Request request = (Request) args[0];
        Request.Options options = (Request.Options) args[1];
        Object bean = pjp.getTarget();
        if (!(bean instanceof TraceFeignClient)) {
            return new TraceFeignClient(this.beanFactory, (Client) bean).execute(request, options);
        }
        return pjp.proceed();
    }
}