feign.metrics5.FeignMetricName Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of feign-dropwizard-metrics5 Show documentation

Feign Dropwizard Metrics 5

The newest version!

/*
 * Copyright © 2012 The Feign Authors ([email protected])
 *
 * 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 feign.metrics5;

import feign.MethodMetadata;
import feign.Target;
import io.dropwizard.metrics5.MetricName;
import io.dropwizard.metrics5.MetricRegistry;
import java.lang.reflect.Method;
import java.net.URI;
import java.net.URISyntaxException;

final class FeignMetricName {

  private final Class meteredComponent;

  public FeignMetricName(Class meteredComponent) {
    this.meteredComponent = meteredComponent;
  }

  public MetricName metricName(MethodMetadata methodMetadata, Target target, String suffix) {
    return metricName(methodMetadata, target).resolve(suffix);
  }

  public MetricName metricName(MethodMetadata methodMetadata, Target target) {
    return metricName(methodMetadata.targetType(), methodMetadata.method(), target.url());
  }

  public MetricName metricName(Class targetType, Method method, String url) {
    return MetricRegistry.name(meteredComponent)
        .tagged("client", targetType.getName())
        .tagged("method", method.getName())
        .tagged("host", extractHost(url));
  }

  private String extractHost(final String targetUrl) {
    try {
      return new URI(targetUrl).getHost();
    } catch (final URISyntaxException e) {
      // can't get the host, in that case, just read first 20 chars from url
      return targetUrl.length() <= 20 ? targetUrl : targetUrl.substring(0, 20);
    }
  }
}