org.springframework.boot.actuate.metrics.web.client.MetricsRestTemplateCustomizer Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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.boot.actuate.metrics.web.client;
import java.util.ArrayList;
import java.util.List;
import io.micrometer.core.instrument.MeterRegistry;
import org.springframework.boot.web.client.RestTemplateCustomizer;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriTemplateHandler;
/**
* {@link RestTemplateCustomizer} that configures the {@link RestTemplate} to record
* request metrics.
*
* @author Andy Wilkinson
* @author Phillip Webb
* @since 2.0.0
*/
public class MetricsRestTemplateCustomizer implements RestTemplateCustomizer {
private final MetricsClientHttpRequestInterceptor interceptor;
/**
* Creates a new {@code MetricsRestTemplateInterceptor} that will record metrics using
* the given {@code meterRegistry} with tags provided by the given
* {@code tagProvider}.
* @param meterRegistry the meter registry
* @param tagProvider the tag provider
* @param metricName the name of the recorded metric
*/
public MetricsRestTemplateCustomizer(MeterRegistry meterRegistry,
RestTemplateExchangeTagsProvider tagProvider, String metricName) {
this.interceptor = new MetricsClientHttpRequestInterceptor(meterRegistry,
tagProvider, metricName);
}
@Override
public void customize(RestTemplate restTemplate) {
UriTemplateHandler templateHandler = restTemplate.getUriTemplateHandler();
templateHandler = this.interceptor.createUriTemplateHandler(templateHandler);
restTemplate.setUriTemplateHandler(templateHandler);
List existingInterceptors = restTemplate
.getInterceptors();
if (!existingInterceptors.contains(this.interceptor)) {
List interceptors = new ArrayList<>();
interceptors.add(this.interceptor);
interceptors.addAll(existingInterceptors);
restTemplate.setInterceptors(interceptors);
}
}
}