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Rework @Timer annotation support

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Rework existing `@Timer` annotation support to remove duplicate code
and offer general purpose utilities that can be used in future metrics
support.

See gh-23112
See gh-22217
pull/26041/head
Phillip Webb 4 years ago
parent 3d7e5e3abd
commit 9f16491535
6 changed files with 87 additions and 49 deletions
Show Stats Download Patch File Download Diff File

19
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/AutoTimer.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2020 the original author or authors.
* 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.
@ -16,12 +16,16 @@
package org.springframework.boot.actuate.metrics;
import java.util.Set;
import java.util.function.Consumer;
import java.util.function.Supplier;
import io.micrometer.core.annotation.Timed;
import io.micrometer.core.instrument.Timer;
import io.micrometer.core.instrument.Timer.Builder;
import org.springframework.util.CollectionUtils;
/**
* Strategy that can be used to apply {@link Timer Timers} automatically instead of using
* {@link Timed @Timed}.
@ -94,4 +98,17 @@ public interface AutoTimer {
*/
void apply(Timer.Builder builder);
static void apply(AutoTimer autoTimer, String metricName, Set<Timed> annotations, Consumer<Timer.Builder> action) {
if (!CollectionUtils.isEmpty(annotations)) {
for (Timed annotation : annotations) {
action.accept(Timer.builder(annotation, metricName));
}
}
else {
if (autoTimer != null && autoTimer.isEnabled()) {
action.accept(autoTimer.builder(metricName));
}
}
}
}

26
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/method/HandlerMethodTimedAnnotations.java → spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/annotation/TimedAnnotations.java
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@ -14,9 +14,10 @@
* limitations under the License.
*/
package org.springframework.boot.actuate.metrics.web.method;
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;
@ -26,30 +27,39 @@ import io.micrometer.core.annotation.Timed;
import org.springframework.core.annotation.MergedAnnotationCollectors;
import org.springframework.core.annotation.MergedAnnotations;
import org.springframework.util.ConcurrentReferenceHashMap;
import org.springframework.web.method.HandlerMethod;
/**
* Utility used to obtain {@link Timed @Timed} annotations from a {@link HandlerMethod}.
* Utility used to obtain {@link Timed @Timed} annotations from bean methods.
*
* @author Phillip Webb
* @since 2.5.0
*/
public final class HandlerMethodTimedAnnotations {
public final class TimedAnnotations {
private static Map<AnnotatedElement, Set<Timed>> cache = new ConcurrentReferenceHashMap<>();
private HandlerMethodTimedAnnotations() {
private TimedAnnotations() {
}
public static Set<Timed> get(HandlerMethod handler) {
Set<Timed> methodAnnotations = findTimedAnnotations(handler.getMethod());
/**
* Return {@link Timed} annotation 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(handler.getBeanType());
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;

20
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/annotation/package-info.java
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@ -0,0 +1,20 @@
/*
* 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.
*/
/**
* Support classes for handler method metrics.
*/
package org.springframework.boot.actuate.metrics.annotation;

25
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/MetricsWebFilter.java
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@ -23,13 +23,11 @@ import java.util.concurrent.TimeUnit;
import io.micrometer.core.annotation.Timed;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.Timer;
import io.micrometer.core.instrument.Timer.Builder;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Mono;
import org.springframework.boot.actuate.metrics.AutoTimer;
import org.springframework.boot.actuate.metrics.web.method.HandlerMethodTimedAnnotations;
import org.springframework.boot.actuate.metrics.annotation.TimedAnnotations;
import org.springframework.boot.web.reactive.error.ErrorAttributes;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
@ -102,22 +100,19 @@ public class MetricsWebFilter implements WebFilter {
private void record(ServerWebExchange exchange, Throwable cause, long start) {
cause = (cause != null) ? cause : exchange.getAttribute(ErrorAttributes.ERROR_ATTRIBUTE);
Object handler = exchange.getAttribute(HandlerMapping.BEST_MATCHING_HANDLER_ATTRIBUTE);
Set<Timed> annotations = (handler instanceof HandlerMethod)
? HandlerMethodTimedAnnotations.get((HandlerMethod) handler) : Collections.emptySet();
Set<Timed> annotations = getTimedAnnotations(handler);
Iterable<Tag> tags = this.tagsProvider.httpRequestTags(exchange, cause);
long duration = System.nanoTime() - start;
if (annotations.isEmpty()) {
if (this.autoTimer.isEnabled()) {
Builder builder = this.autoTimer.builder(this.metricName);
builder.tags(tags).register(this.registry).record(duration, TimeUnit.NANOSECONDS);
}
}
else {
for (Timed annotation : annotations) {
Builder builder = Timer.builder(annotation, this.metricName);
builder.tags(tags).register(this.registry).record(duration, TimeUnit.NANOSECONDS);
AutoTimer.apply(this.autoTimer, this.metricName, annotations,
(builder) -> builder.tags(tags).register(this.registry).record(duration, TimeUnit.NANOSECONDS));
}
private Set<Timed> getTimedAnnotations(Object handler) {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
return TimedAnnotations.get(handlerMethod.getMethod(), handlerMethod.getBeanType());
}
return Collections.emptySet();
}
}

31
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/servlet/WebMvcMetricsFilter.java
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@ -32,7 +32,7 @@ import io.micrometer.core.instrument.Timer.Builder;
import io.micrometer.core.instrument.Timer.Sample;
import org.springframework.boot.actuate.metrics.AutoTimer;
import org.springframework.boot.actuate.metrics.web.method.HandlerMethodTimedAnnotations;
import org.springframework.boot.actuate.metrics.annotation.TimedAnnotations;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.http.HttpStatus;
import org.springframework.web.filter.OncePerRequestFilter;
@ -42,8 +42,8 @@ import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.util.NestedServletException;
/**
* Intercepts incoming HTTP requests and records metrics about Spring MVC execution time
* and results.
* Intercepts incoming HTTP requests handled by Spring MVC handlers and records metrics
* about execution time and results.
*
* @author Jon Schneider
* @author Phillip Webb
@ -128,27 +128,24 @@ public class WebMvcMetricsFilter extends OncePerRequestFilter {
private void record(TimingContext timingContext, HttpServletRequest request, HttpServletResponse response,
Throwable exception) {
Object handler = getHandler(request);
Set<Timed> annotations = (handler instanceof HandlerMethod)
? HandlerMethodTimedAnnotations.get((HandlerMethod) handler) : Collections.emptySet();
Set<Timed> annotations = getTimedAnnotations(handler);
Timer.Sample timerSample = timingContext.getTimerSample();
if (annotations.isEmpty()) {
if (this.autoTimer.isEnabled()) {
Builder builder = this.autoTimer.builder(this.metricName);
timerSample.stop(getTimer(builder, handler, request, response, exception));
}
}
else {
for (Timed annotation : annotations) {
Builder builder = Timer.builder(annotation, this.metricName);
timerSample.stop(getTimer(builder, handler, request, response, exception));
}
}
AutoTimer.apply(this.autoTimer, this.metricName, annotations,
(builder) -> timerSample.stop(getTimer(builder, handler, request, response, exception)));
}
private Object getHandler(HttpServletRequest request) {
return request.getAttribute(HandlerMapping.BEST_MATCHING_HANDLER_ATTRIBUTE);
}
private Set<Timed> getTimedAnnotations(Object handler) {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
return TimedAnnotations.get(handlerMethod.getMethod(), handlerMethod.getBeanType());
}
return Collections.emptySet();
}
private Timer getTimer(Builder builder, Object handler, HttpServletRequest request, HttpServletResponse response,
Throwable exception) {
return builder.tags(this.tagsProvider.getTags(request, response, handler, exception)).register(this.registry);

13
spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/method/HandlerMethodTimedAnnotationsTests.java → spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/annotation/TimedAnnotationsTests.java
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@ -14,7 +14,7 @@
* limitations under the License.
*/
package org.springframework.boot.actuate.metrics.web.method;
package org.springframework.boot.actuate.metrics.annotation;
import java.lang.reflect.Method;
import java.util.Set;
@ -23,22 +23,21 @@ import io.micrometer.core.annotation.Timed;
import org.junit.jupiter.api.Test;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.method.HandlerMethod;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link HandlerMethodTimedAnnotations}.
* Tests for {@link TimedAnnotations}.
*
* @author Phillip Webb
*/
class HandlerMethodTimedAnnotationsTests {
class TimedAnnotationsTests {
@Test
void getWhenNoneReturnsEmptySet() {
Object bean = new None();
Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
Set<Timed> annotations = HandlerMethodTimedAnnotations.get(new HandlerMethod(bean, method));
Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
assertThat(annotations).isEmpty();
}
@ -46,7 +45,7 @@ class HandlerMethodTimedAnnotationsTests {
void getWhenOnMethodReturnsMethodAnnotations() {
Object bean = new OnMethod();
Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
Set<Timed> annotations = HandlerMethodTimedAnnotations.get(new HandlerMethod(bean, method));
Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
assertThat(annotations).extracting(Timed::value).containsOnly("y", "z");
}
@ -54,7 +53,7 @@ class HandlerMethodTimedAnnotationsTests {
void getWhenNonOnMethodReturnsBeanAnnotations() {
Object bean = new OnBean();
Method method = ReflectionUtils.findMethod(bean.getClass(), "handle");
Set<Timed> annotations = HandlerMethodTimedAnnotations.get(new HandlerMethod(bean, method));
Set<Timed> annotations = TimedAnnotations.get(method, bean.getClass());
assertThat(annotations).extracting(Timed::value).containsOnly("y", "z");
}
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