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Spring Cloud Sleuth AutoConfigure
/*
* Copyright 2013-2021 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
*
* https://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.autoconfig.instrument.web.client;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
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.sleuth.CurrentTraceContext;
import org.springframework.cloud.sleuth.Tracer;
import org.springframework.cloud.sleuth.autoconfig.brave.BraveAutoConfiguration;
import org.springframework.cloud.sleuth.http.HttpClientHandler;
import org.springframework.cloud.sleuth.instrument.web.mvc.TracingAsyncClientHttpRequestInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.AsyncClientHttpRequestFactory;
import org.springframework.http.client.AsyncClientHttpRequestInterceptor;
import org.springframework.web.client.AsyncRestTemplate;
/**
* {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration
* Auto-configuration} enables span information propagation for
* {@link AsyncClientHttpRequestFactory} and {@link AsyncRestTemplate}.
*
* @author Marcin Grzejszczak
* @since 1.0.0
*/
@Configuration(proxyBeanMethods = false)
@ConditionalnOnSleuthWebClient
@ConditionalOnProperty(value = "spring.sleuth.web.async.client.enabled", matchIfMissing = true)
@ConditionalOnClass(AsyncRestTemplate.class)
@ConditionalOnBean(Tracer.class)
@AutoConfigureAfter(BraveAutoConfiguration.class)
public class TraceWebAsyncClientAutoConfiguration {
@Configuration(proxyBeanMethods = false)
@ConditionalOnBean(AsyncRestTemplate.class)
static class AsyncRestTemplateConfig {
@Bean
public TracingAsyncClientHttpRequestInterceptor asyncTracingClientHttpRequestInterceptor(
CurrentTraceContext currentTraceContext, HttpClientHandler httpClientHandler) {
return (TracingAsyncClientHttpRequestInterceptor) TracingAsyncClientHttpRequestInterceptor
.create(currentTraceContext, httpClientHandler);
}
@Configuration(proxyBeanMethods = false)
protected static class TraceInterceptorConfiguration {
@Autowired(required = false)
private Collection restTemplates;
@Autowired
private TracingAsyncClientHttpRequestInterceptor clientInterceptor;
@PostConstruct
public void init() {
if (this.restTemplates != null) {
for (AsyncRestTemplate restTemplate : this.restTemplates) {
List interceptors = new ArrayList<>(
restTemplate.getInterceptors());
interceptors.add(this.clientInterceptor);
restTemplate.setInterceptors(interceptors);
}
}
}
}
}
}