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Add tombstoned metric to JMX #3166

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Add tombstoned metric to JMX #3166

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4c06aa3
Add tombstoned metric to JMX
Claimundefine Jun 27, 2024
d754999
Merge branch '7.7.x' into DGS-12975
Claimundefine Jun 27, 2024
8ad718f
Add tombstoning schemas to test
Claimundefine Jun 28, 2024
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9 changes: 9 additions & 0 deletions core/src/main/java/io/confluent/kafka/schemaregistry/metrics/MetricsContainer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,7 @@ public class MetricsContainer {
public static final String METRIC_NAME_API_FAILURE_COUNT = "api-failure-count";
public static final String METRIC_NAME_REGISTERED_COUNT = "registered-count";
public static final String METRIC_NAME_DELETED_COUNT = "deleted-count";
public static final String METRIC_NAME_TOMBSTONED_COUNT = "tombstoned-count";
public static final String METRIC_NAME_AVRO_SCHEMAS_CREATED = "avro-schemas-created";
public static final String METRIC_NAME_AVRO_SCHEMAS_DELETED = "avro-schemas-deleted";
public static final String METRIC_NAME_JSON_SCHEMAS_CREATED = "json-schemas-created";
Expand All @@ -73,6 +74,7 @@ public class MetricsContainer {

private final SchemaRegistryMetric schemasCreated;
private final SchemaRegistryMetric schemasDeleted;
private final SchemaRegistryMetric schemasTombstoned;
private final SchemaRegistryMetric customSchemaProviders;
private final SchemaRegistryMetric apiCallsSuccess;
private final SchemaRegistryMetric apiCallsFailure;
Expand Down Expand Up @@ -127,6 +129,9 @@ public MetricsContainer(SchemaRegistryConfig config, String kafkaClusterId) {
new CumulativeCount());
this.schemasDeleted = createMetric(METRIC_NAME_DELETED_COUNT, "Number of deleted schemas",
new CumulativeCount());
this.schemasTombstoned = createMetric(METRIC_NAME_TOMBSTONED_COUNT,
"Number of tombstoned schemas",
new CumulativeCount());

this.avroSchemasCreated = createMetric(METRIC_NAME_AVRO_SCHEMAS_CREATED,
"Number of registered Avro schemas", new CumulativeCount());
Expand Down Expand Up @@ -216,6 +221,10 @@ public SchemaRegistryMetric getSchemasDeleted(String type) {
return getSchemaTypeMetric(type, false);
}

public SchemaRegistryMetric getSchemasTombstoned() {
return schemasTombstoned;
}

private SchemaRegistryMetric getSchemaTypeMetric(String type, boolean isRegister) {
switch (type) {
case AvroSchema.TYPE:
Expand Down
1 change: 1 addition & 0 deletions core/src/main/java/io/confluent/kafka/schemaregistry/storage/KafkaStoreMessageHandler.java
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Expand Up @@ -191,6 +191,7 @@ private void handleSchemaUpdate(SchemaKey schemaKey,
}
} else {
lookupCache.schemaTombstoned(schemaKey, oldSchemaValue);
updateMetrics(metricsContainer.getSchemasTombstoned(), null);
}
}

Expand Down
10 changes: 10 additions & 0 deletions core/src/test/java/io/confluent/kafka/schemaregistry/metrics/MetricsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
import static io.confluent.kafka.schemaregistry.metrics.MetricsContainer.METRIC_NAME_DELETED_COUNT;
import static io.confluent.kafka.schemaregistry.metrics.MetricsContainer.METRIC_NAME_MASTER_SLAVE_ROLE;
import static io.confluent.kafka.schemaregistry.metrics.MetricsContainer.METRIC_NAME_REGISTERED_COUNT;
import static io.confluent.kafka.schemaregistry.metrics.MetricsContainer.METRIC_NAME_TOMBSTONED_COUNT;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

Expand Down Expand Up @@ -63,6 +64,8 @@ public void testSchemaCreatedCount() throws Exception {
new ObjectName("kafka.schema.registry:type=" + METRIC_NAME_AVRO_SCHEMAS_CREATED);
ObjectName schemasDeleted =
new ObjectName("kafka.schema.registry:type=" + METRIC_NAME_DELETED_COUNT);
ObjectName schemasTombstoned =
new ObjectName("kafka.schema.registry:type=" + METRIC_NAME_TOMBSTONED_COUNT);
ObjectName avroDeleted =
new ObjectName("kafka.schema.registry:type=" + METRIC_NAME_AVRO_SCHEMAS_DELETED);

Expand Down Expand Up @@ -90,9 +93,16 @@ public void testSchemaCreatedCount() throws Exception {
subject, i.toString()));
}

// Tombstoning schemas should not modify create count.
for (Integer i = 1; i < schemaIdCounter; i++) {
assertEquals(i, service.deleteSchemaVersion(RestService.DEFAULT_REQUEST_PROPERTIES,
subject, i.toString(), true));
}

assertEquals((double) schemaCount, mBeanServer.getAttribute(schemasCreated, METRIC_NAME_REGISTERED_COUNT));
assertEquals((double) schemaCount, mBeanServer.getAttribute(avroCreated, METRIC_NAME_AVRO_SCHEMAS_CREATED));
assertEquals((double) schemaCount, mBeanServer.getAttribute(schemasDeleted, METRIC_NAME_DELETED_COUNT));
assertEquals((double) schemaCount, mBeanServer.getAttribute(schemasTombstoned, METRIC_NAME_TOMBSTONED_COUNT));
assertEquals((double) schemaCount, mBeanServer.getAttribute(avroDeleted, METRIC_NAME_AVRO_SCHEMAS_DELETED));
}

Expand Down