org.springframework.boot.actuate.metrics.web.client.MetricsClientHttpRequestInterceptor 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.io.IOException;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
import org.springframework.core.NamedThreadLocal;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.util.UriTemplateHandler;
/**
* {@link ClientHttpRequestInterceptor} applied via a
* {@link MetricsRestTemplateCustomizer} to record metrics.
*
* @author Jon Schneider
* @author Phillip Webb
* @since 2.0.0
*/
class MetricsClientHttpRequestInterceptor implements ClientHttpRequestInterceptor {
private static final ThreadLocal urlTemplate = new NamedThreadLocal<>(
"Rest Template URL Template");
private final MeterRegistry meterRegistry;
private final RestTemplateExchangeTagsProvider tagProvider;
private final String metricName;
MetricsClientHttpRequestInterceptor(MeterRegistry meterRegistry,
RestTemplateExchangeTagsProvider tagProvider, String metricName) {
this.tagProvider = tagProvider;
this.meterRegistry = meterRegistry;
this.metricName = metricName;
}
@Override
public ClientHttpResponse intercept(HttpRequest request, byte[] body,
ClientHttpRequestExecution execution) throws IOException {
long startTime = System.nanoTime();
ClientHttpResponse response = null;
try {
response = execution.execute(request, body);
return response;
}
finally {
getTimeBuilder(request, response).register(this.meterRegistry)
.record(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
urlTemplate.remove();
}
}
UriTemplateHandler createUriTemplateHandler(UriTemplateHandler delegate) {
return new UriTemplateHandler() {
@Override
public URI expand(String url, Map arguments) {
urlTemplate.set(url);
return delegate.expand(url, arguments);
}
@Override
public URI expand(String url, Object... arguments) {
urlTemplate.set(url);
return delegate.expand(url, arguments);
}
};
}
private Timer.Builder getTimeBuilder(HttpRequest request,
ClientHttpResponse response) {
return Timer.builder(this.metricName)
.tags(this.tagProvider.getTags(urlTemplate.get(), request, response))
.description("Timer of RestTemplate operation");
}
}