spring TimedAnnotations 源码
springboot TimedAnnotations 代码
文件路径：/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/annotation/TimedAnnotations.java
/*
* Copyright 2012-2021 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.annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import io.micrometer.core.annotation.Timed;
import org.springframework.core.annotation.MergedAnnotationCollectors;
import org.springframework.core.annotation.MergedAnnotations;
import org.springframework.util.ConcurrentReferenceHashMap;
/**
* Utility used to obtain {@link Timed @Timed} annotations from bean methods.
*
* @author Phillip Webb
* @since 2.5.0
*/
public final class TimedAnnotations {
private static final Map<AnnotatedElement, Set<Timed>> cache = new ConcurrentReferenceHashMap<>();
private TimedAnnotations() {
}
/**
* Return {@link Timed} annotations that should be used for the given {@code method}
* and {@code type}.
* @param method the source method
* @param type the source type
* @return the {@link Timed} annotations to use or an empty set
*/
public static Set<Timed> get(Method method, Class<?> type) {
Set<Timed> methodAnnotations = findTimedAnnotations(method);
if (!methodAnnotations.isEmpty()) {
return methodAnnotations;
}
return findTimedAnnotations(type);
}
private static Set<Timed> findTimedAnnotations(AnnotatedElement element) {
if (element == null) {
return Collections.emptySet();
}
Set<Timed> result = cache.get(element);
if (result != null) {
return result;
}
MergedAnnotations annotations = MergedAnnotations.from(element);
result = (!annotations.isPresent(Timed.class)) ? Collections.emptySet()
: annotations.stream(Timed.class).collect(MergedAnnotationCollectors.toAnnotationSet());
cache.put(element, result);
return result;
}
}
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- 所属分类： 后端技术
- 本文标签： Spring Boot Java Spring
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