org.springframework.boot.actuate.autoconfigure.observation.ObservationHandlerGrouping Maven / Gradle / Ivy
/*
* Copyright 2012-2023 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;
import java.util.ArrayList;
import java.util.List;
import io.micrometer.observation.ObservationHandler;
import io.micrometer.observation.ObservationHandler.FirstMatchingCompositeObservationHandler;
import io.micrometer.observation.ObservationRegistry.ObservationConfig;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* Groups {@link ObservationHandler ObservationHandlers} by type.
*
* @author Andy Wilkinson
* @author Moritz Halbritter
*/
@SuppressWarnings("rawtypes")
class ObservationHandlerGrouping {
private final List> categories;
ObservationHandlerGrouping(Class category) {
this(List.of(category));
}
ObservationHandlerGrouping(List> categories) {
this.categories = categories;
}
void apply(List> handlers, ObservationConfig config) {
MultiValueMap, ObservationHandler> groupings = new LinkedMultiValueMap<>();
List> handlersWithoutCategory = new ArrayList<>();
for (ObservationHandler handler : handlers) {
Class category = findCategory(handler);
if (category != null) {
groupings.add(category, handler);
}
else {
handlersWithoutCategory.add(handler);
}
}
for (Class category : this.categories) {
List> handlerGroup = groupings.get(category);
if (!CollectionUtils.isEmpty(handlerGroup)) {
config.observationHandler(new FirstMatchingCompositeObservationHandler(handlerGroup));
}
}
for (ObservationHandler observationHandler : handlersWithoutCategory) {
config.observationHandler(observationHandler);
}
}
private Class findCategory(ObservationHandler handler) {
for (Class category : this.categories) {
if (category.isInstance(handler)) {
return category;
}
}
return null;
}
}