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Copy pathFeignMetricName.java
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74 lines (61 loc) · 2.21 KB
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/**
* Copyright 2012-2020 The Feign 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 feign.micrometer;
import java.lang.reflect.Method;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import feign.MethodMetadata;
import feign.Target;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.config.NamingConvention;
public final class FeignMetricName {
private final Class<?> meteredComponent;
public FeignMetricName(Class<?> meteredComponent) {
this.meteredComponent = meteredComponent;
}
public String name(String suffix) {
return name()
// any separator, so naming convention can change it
+ "." + suffix;
}
public String name() {
return meteredComponent.getName();
}
public List<Tag> tag(MethodMetadata methodMetadata, Target<?> target, Tag... tags) {
return tag(methodMetadata.targetType(), methodMetadata.method(), target.url(), tags);
}
public List<Tag> tag(Class<?> targetType, Method method, String url, Tag... extraTags) {
List<Tag> tags = new ArrayList<>();
tags.add(Tag.of("client", targetType.getName()));
tags.add(Tag.of("method", method.getName()));
tags.add(Tag.of("host", extractHost(url)));
tags.addAll(Arrays.asList(extraTags));
return tags;
}
private String extractHost(final String targetUrl) {
try {
String host = new URI(targetUrl).getHost();
if (host != null)
return host;
} 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);
}
}