Skip to content

Metric endpoint is summing up same metric #14497

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 8 commits into from
+66 −10
Closed

Metric endpoint is summing up same metric #14497

Show file tree
Hide file tree
Changes from 4 commits
Commits
Show all changes
8 commits
Select commit Hold shift + click to select a range
cda2e52
14066: finding first matching meters from nested MeterRegistries
pulkitmehra Sep 17, 2018
d4fd6d1
14066: adding more test case to find meters inside CompositeRegistries
pulkitmehra Sep 18, 2018
3555e40
Merge remote-tracking branch 'upstream/master' into 14066_metric_endp…
pulkitmehra Sep 18, 2018
45613ef
14066: removed a flaky test
pulkitmehra Sep 18, 2018
1658bde
Merge remote-tracking branch 'upstream/master' into 14066_metric_endp…
pulkitmehra Sep 19, 2018
13fef7d
14066: incorporate review comments to fix metric endpoint sum up values
pulkitmehra Sep 19, 2018
f72050a
14066: refactoring MetricEndpoint to use Collection instead of List
pulkitmehra Sep 20, 2018
d228116
Merge remote-tracking branch 'upstream/master' into 14066_metric_endp…
pulkitmehra Sep 20, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 12 additions & 7 deletions ...boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/MetricsEndpoint.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
package org.springframework.boot.actuate.metrics;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
Expand Down Expand Up @@ -82,8 +83,7 @@ public MetricResponse metric(@Selector String requiredMetricName,
@Nullable List<String> tag) {
List<Tag> tags = parseTags(tag);
List<Meter> meters = new ArrayList<>();
collectMeters(meters, this.registry, requiredMetricName, tags);
if (meters.isEmpty()) {
if (!findFirstMatchingMeters(meters, this.registry, requiredMetricName, tags)) {
return null;
}
Map<Statistic, Double> samples = getSamples(meters);
Expand Down Expand Up @@ -112,15 +112,20 @@ private Tag parseTag(String tag) {
return Tag.of(parts[0], parts[1]);
}

private void collectMeters(List<Meter> meters, MeterRegistry registry, String name,
Iterable<Tag> tags) {
private boolean findFirstMatchingMeters(List<Meter> meters, MeterRegistry registry,
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Rather than modifying a parameter, this method could simply return a Collection.

String name, Iterable<Tag> tags) {
if (registry instanceof CompositeMeterRegistry) {
((CompositeMeterRegistry) registry).getRegistries()
.forEach((member) -> collectMeters(meters, member, name, tags));
return ((CompositeMeterRegistry) registry).getRegistries().stream()
.anyMatch((r) -> findFirstMatchingMeters(meters, r, name, tags));
}
else {
meters.addAll(registry.find(name).tags(tags).meters());
Collection<Meter> meterFound = registry.find(name).tags(tags).meters();
if (meterFound != null && meterFound.size() > 0) {
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Micrometer guarantees that meterFound is non-null. Could use isEmpty() on second condition.

meters.addAll(meterFound);
return true;
}
}
return false;
}

private Map<Statistic, Double> getSamples(List<Meter> meters) {
Expand Down
49 changes: 49 additions & 0 deletions ...actuator/src/test/java/org/springframework/boot/actuate/metrics/MetricsEndpointTests.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,55 @@ public void metricValuesAreTheSumOfAllTimeSeriesMatchingTags() {
assertThat(getCount(response)).hasValue(4.0);
}

@Test
public void findFirstMatchingMetersFromNestedRegistries() {
CompositeMeterRegistry composite = new CompositeMeterRegistry();
SimpleMeterRegistry reg1 = new SimpleMeterRegistry();
CompositeMeterRegistry reg2 = new CompositeMeterRegistry();
SimpleMeterRegistry reg3 = new SimpleMeterRegistry();

// 1st level nesting
composite.add(reg1);

// 2st level nesting
reg2.add(reg3);
composite.add(reg2);

// 2nd level registry has metrics
reg3.counter("cache", "result", "hit", "host", "1").increment(2);
reg3.counter("cache", "result", "miss", "host", "1").increment(2);
reg3.counter("cache", "result", "hit", "host", "2").increment(2);

MetricsEndpoint endpoint = new MetricsEndpoint(composite);

MetricsEndpoint.MetricResponse response = endpoint.metric("cache",
Collections.emptyList());
assertThat(response.getName()).isEqualTo("cache");
assertThat(availableTagKeys(response)).containsExactly("result", "host");
assertThat(getCount(response)).hasValue(6.0);

response = endpoint.metric("cache", Collections.singletonList("result:hit"));
assertThat(availableTagKeys(response)).containsExactly("host");
assertThat(getCount(response)).hasValue(4.0);
}

@Test
public void matchingMeterNotFoundInNestedRegistries() {
CompositeMeterRegistry composite = new CompositeMeterRegistry();
CompositeMeterRegistry reg2 = new CompositeMeterRegistry();
SimpleMeterRegistry reg3 = new SimpleMeterRegistry();

// nested registries
reg2.add(reg3);
composite.add(reg2);

MetricsEndpoint endpoint = new MetricsEndpoint(composite);

MetricsEndpoint.MetricResponse response = endpoint.metric("invalid.metric.name",
Collections.emptyList());
assertThat(response).isNull();
}

@Test
public void metricTagValuesAreDeduplicated() {
this.registry.counter("cache", "host", "1", "region", "east", "result", "hit");
Expand Down