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ServerRequestObservationConventionAdapter.java
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ServerRequestObservationConventionAdapter.java
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/*
* Copyright 2012-2022 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.autoconfigure.observation.web.servlet;
import java.util.List;
import io.micrometer.common.KeyValues;
import io.micrometer.core.instrument.Tag;
import io.micrometer.observation.Observation;
import org.springframework.boot.actuate.metrics.web.servlet.DefaultWebMvcTagsProvider;
import org.springframework.boot.actuate.metrics.web.servlet.WebMvcTagsContributor;
import org.springframework.boot.actuate.metrics.web.servlet.WebMvcTagsProvider;
import org.springframework.http.server.observation.ServerRequestObservationContext;
import org.springframework.http.server.observation.ServerRequestObservationConvention;
import org.springframework.util.Assert;
import org.springframework.web.servlet.HandlerMapping;
/**
* Adapter class that applies {@link WebMvcTagsProvider} tags as a
* {@link ServerRequestObservationConvention}.
*
* @author Brian Clozel
*/
@SuppressWarnings("removal")
@Deprecated(since = "3.0.0", forRemoval = true)
class ServerRequestObservationConventionAdapter implements ServerRequestObservationConvention {
private final String observationName;
private final WebMvcTagsProvider tagsProvider;
ServerRequestObservationConventionAdapter(String observationName, WebMvcTagsProvider tagsProvider,
List<WebMvcTagsContributor> contributors) {
Assert.state((tagsProvider != null) || (contributors != null),
"adapter should adapt to a WebMvcTagsProvider or a list of contributors");
this.observationName = observationName;
this.tagsProvider = (tagsProvider != null) ? tagsProvider : new DefaultWebMvcTagsProvider(contributors);
}
@Override
public String getName() {
return this.observationName;
}
@Override
public boolean supportsContext(Observation.Context context) {
return context instanceof ServerRequestObservationContext;
}
@Override
public KeyValues getLowCardinalityKeyValues(ServerRequestObservationContext context) {
Iterable<Tag> tags = this.tagsProvider.getTags(context.getCarrier(), context.getResponse(), getHandler(context),
context.getError());
return KeyValues.of(tags, Tag::getKey, Tag::getValue);
}
private Object getHandler(ServerRequestObservationContext context) {
return context.getCarrier().getAttribute(HandlerMapping.BEST_MATCHING_HANDLER_ATTRIBUTE);
}
}