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@MetricOptions to allow filtering AbstractMethodTagger beans to apply to metrics #764

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May 28, 2024
Merged

@MetricOptions to allow filtering AbstractMethodTagger beans to apply to metrics #764

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7cfc836
annotation and tests
hrothwell May 17, 2024
3af0b2a
comment
hrothwell May 17, 2024
eb3e389
add helper annotation value
hrothwell May 23, 2024
803593e
update javadocs
hrothwell May 28, 2024
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43 changes: 43 additions & 0 deletions ...meter-core/src/main/java/io/micronaut/configuration/metrics/annotation/MetricOptions.java
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@@ -0,0 +1,43 @@
/*
* Copyright 2017-2019 original 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 io.micronaut.configuration.metrics.annotation;

import io.micronaut.configuration.metrics.aggregator.AbstractMethodTagger;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
* Holds metadata about metric options to apply
*
* @author Haiden Rothwell
* @since 5.6.0
*/
@Documented
@Retention(RUNTIME)
@Target({METHOD})
public @interface MetricOptions {
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/**
* TODO if empty or null should this do nothing? no filtering happening unless something defined? but then
* what if you really truly don't want anything applied? Null is not an option for default, some secondary annotation value?
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you can add a containers check for the annotation member and if it is empty then disable all taggers I guess

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I'm not sure I follow what you are referring to, but it sounds like disable all taggers if taggers is empty?

The idea I am going back and forth on is how do we differentiate "use all taggers" without needing to specify all additional taggers? Ideally what I was hoping for was something like:

taggers == null --> no filtering done, all taggers get appliedf
taggers == empty array --> filtering is enabled, this filters out all taggers effectively disabling them
taggers == populated array --> filters just to taggers in populated array

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I added a helper annotation value as a different option also, not sure what is most ideal really

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ok looks fine can you update the javadoc and remove the TODO

* @return array of {@link io.micronaut.configuration.metrics.aggregator.AbstractMethodTagger} to apply to metrics for method
*/
Class<? extends AbstractMethodTagger>[] taggers() default {};
}
6 changes: 5 additions & 1 deletion ...main/java/io/micronaut/configuration/metrics/micrometer/intercept/CountedInterceptor.java
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Expand Up @@ -23,6 +23,7 @@
import io.micronaut.aop.MethodInterceptor;
import io.micronaut.aop.MethodInvocationContext;
import io.micronaut.configuration.metrics.aggregator.AbstractMethodTagger;
import io.micronaut.configuration.metrics.annotation.MetricOptions;
import io.micronaut.configuration.metrics.annotation.RequiresMetrics;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.annotation.Nullable;
Expand All @@ -34,6 +35,7 @@
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
Expand Down Expand Up @@ -148,13 +150,15 @@ public Object intercept(MethodInvocationContext<Object, Object> context) {
}

private void doCount(AnnotationMetadata metadata, String metricName, @Nullable Throwable e, MethodInvocationContext<Object, Object> context) {
List<Class<? extends AbstractMethodTagger>> taggers = Arrays.asList(metadata.classValues(MetricOptions.class, "taggers"));
Counter.builder(metricName)
.tags(metadata.stringValues(Counted.class, "extraTags"))
.tags(
methodTaggers.isEmpty() ? Collections.emptyList() :
methodTaggers
.stream()
.flatMap(b -> b.getTags(context).stream())
.filter(t -> taggers.isEmpty() || taggers.contains(t.getClass()))
.flatMap(t -> t.getTags(context).stream())
.toList()
)
.description(metadata.stringValue(Counted.class, "description").orElse(null))
Expand Down
6 changes: 5 additions & 1 deletion ...c/main/java/io/micronaut/configuration/metrics/micrometer/intercept/TimedInterceptor.java
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Expand Up @@ -25,6 +25,7 @@
import io.micronaut.aop.MethodInterceptor;
import io.micronaut.aop.MethodInvocationContext;
import io.micronaut.configuration.metrics.aggregator.AbstractMethodTagger;
import io.micronaut.configuration.metrics.annotation.MetricOptions;
import io.micronaut.configuration.metrics.annotation.RequiresMetrics;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.annotation.AnnotationValue;
Expand All @@ -43,6 +44,7 @@
import reactor.core.publisher.Mono;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
Expand Down Expand Up @@ -212,6 +214,7 @@ private void stopTimed(String metricName, Timer.Sample sample,
try {
final String description = metadata.stringValue("description").orElse(null);
final String[] tags = metadata.stringValues("extraTags");
List<Class<? extends AbstractMethodTagger>> taggers = Arrays.asList(context.getAnnotationMetadata().classValues(MetricOptions.class, "taggers"));
final double[] percentiles = metadata.doubleValues("percentiles");
final boolean histogram = metadata.isTrue("histogram");
final Timer timer = Timer.builder(metricName)
Expand All @@ -221,7 +224,8 @@ private void stopTimed(String metricName, Timer.Sample sample,
methodTaggers.isEmpty() ? Collections.emptyList() :
methodTaggers
.stream()
.flatMap(b -> b.getTags(context).stream())
.filter(t -> taggers.isEmpty() || taggers.contains(t.getClass()))
.flatMap(b -> b.getTags(context).stream())
.toList()
)
.tags(EXCEPTION_TAG, exceptionClass)
Expand Down
27 changes: 27 additions & 0 deletions ...rc/test/groovy/io/micronaut/configuration/metrics/annotation/CountedAnnotationSpec.groovy
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@@ -1,12 +1,15 @@
package io.micronaut.configuration.metrics.annotation

import io.micrometer.core.instrument.MeterRegistry
import io.micrometer.core.instrument.search.MeterNotFoundException
import io.micronaut.context.ApplicationContext
import spock.lang.Specification
import spock.util.concurrent.PollingConditions

import java.util.function.Consumer

import static java.util.concurrent.TimeUnit.MILLISECONDS

class CountedAnnotationSpec extends Specification {

void "test counted annotation usage"() {
Expand Down Expand Up @@ -86,4 +89,28 @@ class CountedAnnotationSpec extends Specification {
cleanup:
ctx.close()
}

void "taggers are filtered if filter present"(){
given:
ApplicationContext ctx = ApplicationContext.run()
CountedTarget tt = ctx.getBean(CountedTarget)
MeterRegistry registry = ctx.getBean(MeterRegistry)

when:
Integer result = tt.maxWithOptions(4, 10)
registry.get("counted.test.maxWithOptions.blocking").tags("method", "maxWithOptions", "parameters", "a b").counter()

then:
thrown(MeterNotFoundException)

when:
def timer = registry.get("counted.test.maxWithOptions.blocking").tags("method", "maxWithOptions").counter()

then:
result == 10
timer.count() == 1

cleanup:
ctx.close()
}
}
26 changes: 26 additions & 0 deletions ...e/src/test/groovy/io/micronaut/configuration/metrics/annotation/TimeAnnotationSpec.groovy
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Expand Up @@ -2,6 +2,7 @@ package io.micronaut.configuration.metrics.annotation

import io.micrometer.core.instrument.MeterRegistry
import io.micrometer.core.instrument.Tag
import io.micrometer.core.instrument.search.MeterNotFoundException
import io.micronaut.context.ApplicationContext
import spock.lang.Specification
import spock.util.concurrent.PollingConditions
Expand Down Expand Up @@ -99,4 +100,29 @@ class TimeAnnotationSpec extends Specification {
cleanup:
ctx.close()
}

void "taggers are filtered if filter present"(){
given:
ApplicationContext ctx = ApplicationContext.run()
TimedTarget tt = ctx.getBean(TimedTarget)
MeterRegistry registry = ctx.getBean(MeterRegistry)

when:
Integer result = tt.maxWithOptions(4, 10)
registry.get("timed.test.maxWithOptions.blocking").tags("method", "maxWithOptions", "parameters", "a b").timer()

then:
thrown(MeterNotFoundException)

when:
def timer = registry.get("timed.test.maxWithOptions.blocking").tags("method", "maxWithOptions").timer()

then:
result == 10
timer.count() == 1
timer.totalTime(MILLISECONDS) > 0

cleanup:
ctx.close()
}
}
7 changes: 7 additions & 0 deletions ...meter-core/src/test/java/io/micronaut/configuration/metrics/annotation/CountedTarget.java
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@@ -1,6 +1,7 @@
package io.micronaut.configuration.metrics.annotation;

import io.micrometer.core.annotation.Counted;
import io.micronaut.configuration.metrics.aggregator.MethodTaggerExample;
import jakarta.inject.Singleton;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
Expand All @@ -15,6 +16,12 @@ Integer max(int a, int b) {
return Math.max(a, b);
}

@Counted("counted.test.maxWithOptions.blocking")
@MetricOptions(taggers = {MethodTaggerExample.class})
Integer maxWithOptions(int a, int b) {
return Math.max(a, b);
}

@Counted("counted.test.max.blocking")
Integer error(int a, int b) {
throw new NumberFormatException("cannot");
Expand Down
7 changes: 7 additions & 0 deletions micrometer-core/src/test/java/io/micronaut/configuration/metrics/annotation/TimedTarget.java
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@@ -1,6 +1,7 @@
package io.micronaut.configuration.metrics.annotation;

import io.micrometer.core.annotation.Timed;
import io.micronaut.configuration.metrics.aggregator.MethodTaggerExample;
import jakarta.inject.Singleton;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
Expand All @@ -15,6 +16,12 @@ Integer max(int a, int b) {
return Math.max(a, b);
}

@Timed("timed.test.maxWithOptions.blocking")
@MetricOptions(taggers = {MethodTaggerExample.class})
Integer maxWithOptions(int a, int b) {
return Math.max(a, b);
}

@Timed("timed.test.repeated1")
@Timed("timed.test.repeated2")
Integer repeated(int a, int b) {
Expand Down
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