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Remove parent observation key instead of setting null #5083

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18ca693
Prepare issue branch.
mp911de Oct 27, 2025
b0efa15
Remove parent observation key instead of setting null.
mp911de Oct 27, 2025
9609b73
Polishing.
schauder Oct 29, 2025
873cb5f
Polishing.
mp911de Oct 29, 2025
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2 changes: 1 addition & 1 deletion pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@

<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb-parent</artifactId>
<version>5.0.0-SNAPSHOT</version>
<version>5.0.0-GH-5082-SNAPSHOT</version>
<packaging>pom</packaging>

<name>Spring Data MongoDB</name>
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2 changes: 1 addition & 1 deletion spring-data-mongodb-distribution/pom.xml
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Expand Up @@ -15,7 +15,7 @@
<parent>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb-parent</artifactId>
<version>5.0.0-SNAPSHOT</version>
<version>5.0.0-GH-5082-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>

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2 changes: 1 addition & 1 deletion spring-data-mongodb/pom.xml
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Expand Up @@ -13,7 +13,7 @@
<parent>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb-parent</artifactId>
<version>5.0.0-SNAPSHOT</version>
<version>5.0.0-GH-5082-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>

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9 changes: 8 additions & 1 deletion .../java/org/springframework/data/mongodb/observability/MongoObservationCommandListener.java
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Expand Up @@ -17,6 +17,7 @@

import io.micrometer.observation.Observation;
import io.micrometer.observation.ObservationRegistry;
import io.micrometer.observation.ObservationView;
import io.micrometer.observation.contextpropagation.ObservationThreadLocalAccessor;

import java.util.function.BiConsumer;
Expand Down Expand Up @@ -191,7 +192,13 @@ private void stopObservation(@Nullable RequestContext requestContext,
log.debug(
"Restoring parent observation [" + observation + "] for Mongo instrumentation and put it in Mongo context");
}
requestContext.put(ObservationThreadLocalAccessor.KEY, observation.getContext().getParentObservation());
ObservationView parentObservation = observation.getContext().getParentObservation();

if (parentObservation == null) {
requestContext.delete(ObservationThreadLocalAccessor.KEY);
} else {
requestContext.put(ObservationThreadLocalAccessor.KEY, parentObservation);
}
}
}

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50 changes: 20 additions & 30 deletions .../org/springframework/data/mongodb/observability/MongoObservationCommandListenerTests.java
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Expand Up @@ -26,6 +26,7 @@
import io.micrometer.observation.Observation;
import io.micrometer.observation.ObservationRegistry;
import io.micrometer.observation.contextpropagation.ObservationThreadLocalAccessor;
import reactor.core.publisher.BaseSubscriber;

import org.assertj.core.api.Assertions;
import org.bson.BsonDocument;
Expand All @@ -43,6 +44,7 @@
import com.mongodb.event.CommandFailedEvent;
import com.mongodb.event.CommandStartedEvent;
import com.mongodb.event.CommandSucceededEvent;
import com.mongodb.reactivestreams.client.ReactiveContextProvider;

/**
* Series of test cases exercising {@link MongoObservationCommandListener}.
Expand Down Expand Up @@ -73,54 +75,62 @@ void setup() {
@Test
void commandStartedShouldNotInstrumentWhenAdminDatabase() {

// when
listener.commandStarted(new CommandStartedEvent(null, 0, 0, null, "admin", "", null));

// then
assertThat(meterRegistry).hasNoMetrics();
}

@Test
void commandStartedShouldNotInstrumentWhenNoRequestContext() {

// when
listener.commandStarted(new CommandStartedEvent(null, 0, 0, null, "some name", "", null));

// then
assertThat(meterRegistry).hasNoMetrics();
}

@Test
void commandStartedShouldNotInstrumentWhenNoParentSampleInRequestContext() {

// when
listener.commandStarted(new CommandStartedEvent(new MapRequestContext(), 0, 0, null, "some name", "", null));

// then
assertThat(meterRegistry).hasMeterWithName("spring.data.mongodb.command.active");
}

@Test // GH-4994
void commandStartedShouldAlwaysIncludeCollection() {

// when
listener.commandStarted(new CommandStartedEvent(new MapRequestContext(), 0, 0, null, "some name", "hello", null));

// then
// although command 'hello' is collection-less, metric must have tag "db.mongodb.collection"
assertThat(meterRegistry).hasMeterWithNameAndTags(
"spring.data.mongodb.command.active",
Tags.of("db.mongodb.collection", "none"));
}

@Test // GH-5082
void reactiveContextCompletesNormally() {

ReactiveContextProvider rcp = (ReactiveContextProvider) ContextProviderFactory.create(observationRegistry);
RequestContext context = rcp.getContext(new BaseSubscriber<>() {});

listener.commandStarted(new CommandStartedEvent(context, 0, 0, //
new ConnectionDescription( //
new ServerId( //
new ClusterId("description"), //
new ServerAddress("localhost", 1234))),
"database", "insert", //
new BsonDocument("collection", new BsonString("user"))));
listener.commandSucceeded(new CommandSucceededEvent(context, 0, 0, null, "insert", null, null, 0));

assertThatTimerRegisteredWithTags();
}

@Test
void successfullyCompletedCommandShouldCreateTimerWhenParentSampleInRequestContext() {

// given
Observation parent = Observation.start("name", observationRegistry);
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, //
new ConnectionDescription( //
new ServerId( //
Expand All @@ -129,18 +139,15 @@ void successfullyCompletedCommandShouldCreateTimerWhenParentSampleInRequestConte
new BsonDocument("collection", new BsonString("user"))));
listener.commandSucceeded(new CommandSucceededEvent(traceRequestContext, 0, 0, null, "insert", null, null, 0));

// then
assertThatTimerRegisteredWithTags();
}

@Test
void successfullyCompletedCommandWithCollectionHavingCommandNameShouldCreateTimerWhenParentSampleInRequestContext() {

// given
Observation parent = Observation.start("name", observationRegistry);
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, //
new ConnectionDescription( //
new ServerId( //
Expand All @@ -150,18 +157,15 @@ void successfullyCompletedCommandWithCollectionHavingCommandNameShouldCreateTime
new BsonDocument("aggregate", new BsonString("user"))));
listener.commandSucceeded(new CommandSucceededEvent(traceRequestContext, 0, 0, null, "aggregate", null, null, 0));

// then
assertThatTimerRegisteredWithTags();
}

@Test
void successfullyCompletedCommandWithoutClusterInformationShouldCreateTimerWhenParentSampleInRequestContext() {

// given
Observation parent = Observation.start("name", observationRegistry);
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, null, "database", "insert",
new BsonDocument("collection", new BsonString("user"))));
listener.commandSucceeded(new CommandSucceededEvent(traceRequestContext, 0, 0, null, "insert", null, null, 0));
Expand All @@ -176,11 +180,9 @@ void successfullyCompletedCommandWithoutClusterInformationShouldCreateTimerWhenP
@Test
void commandWithErrorShouldCreateTimerWhenParentSampleInRequestContext() {

// given
Observation parent = Observation.start("name", observationRegistry);
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, //
new ConnectionDescription( //
new ServerId( //
Expand All @@ -191,20 +193,17 @@ void commandWithErrorShouldCreateTimerWhenParentSampleInRequestContext() {
listener.commandFailed( //
new CommandFailedEvent(traceRequestContext, 0, 0, null, "db", "insert", 0, new IllegalAccessException()));

// then
assertThatTimerRegisteredWithTags();
}

@Test // GH-4481
void completionShouldIgnoreIncompatibleObservationContext() {

// given
RequestContext traceRequestContext = getContext();

Observation observation = mock(Observation.class);
traceRequestContext.put(ObservationThreadLocalAccessor.KEY, observation);

// when
listener.commandSucceeded(new CommandSucceededEvent(traceRequestContext, 0, 0, null, "insert", null, null, 0));

verify(observation).getContext();
Expand All @@ -214,13 +213,11 @@ void completionShouldIgnoreIncompatibleObservationContext() {
@Test // GH-4481
void failureShouldIgnoreIncompatibleObservationContext() {

// given
RequestContext traceRequestContext = getContext();

Observation observation = mock(Observation.class);
traceRequestContext.put(ObservationThreadLocalAccessor.KEY, observation);

// when
listener.commandFailed(new CommandFailedEvent(traceRequestContext, 0, 0, null, "db", "insert", 0, null));

verify(observation).getContext();
Expand All @@ -230,7 +227,6 @@ void failureShouldIgnoreIncompatibleObservationContext() {
@Test // GH-4321
void shouldUseObservationConvention() {

// given
MongoHandlerObservationConvention customObservationConvention = new MongoHandlerObservationConvention() {
@Override
public boolean supportsContext(Observation.Context context) {
Expand All @@ -245,22 +241,18 @@ public String getName() {
this.listener = new MongoObservationCommandListener(observationRegistry, mock(ConnectionString.class),
customObservationConvention);

// when
listener.commandStarted(new CommandStartedEvent(new MapRequestContext(), 0, 0, null, "some name", "", null));

// then
assertThat(meterRegistry).hasMeterWithName("custom.name.active");
}

@Test // GH-5064
void completionRestoresParentObservation() {

// given
Observation parent = Observation.start("name", observationRegistry);
observationRegistry.setCurrentObservationScope(parent.openScope());
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, null, "database", "insert",
new BsonDocument("collection", new BsonString("user"))));

Expand All @@ -275,12 +267,10 @@ void completionRestoresParentObservation() {
@Test // GH-5064
void failureRestoresParentObservation() {

// given
Observation parent = Observation.start("name", observationRegistry);
observationRegistry.setCurrentObservationScope(parent.openScope());
RequestContext traceRequestContext = getContext();

// when
listener.commandStarted(new CommandStartedEvent(traceRequestContext, 0, 0, null, "database", "insert",
new BsonDocument("collection", new BsonString("user"))));

Expand Down