equanz commented on PR #24815:
URL: https://github.com/apache/pulsar/pull/24815#issuecomment-3364683536
Note:
In my understanding, implementing AutoConfigurationCustomizerProvider allows
you to customize the histogram buckets.
Here is an example.
```java
import com.google.auto.service.AutoService;
import io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizer;
import
io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizerProvider;
import io.opentelemetry.sdk.metrics.Aggregation;
import io.opentelemetry.sdk.metrics.InstrumentSelector;
import io.opentelemetry.sdk.metrics.View;
import java.util.Arrays;
@AutoService(AutoConfigurationCustomizerProvider.class)
public class MyCustomizerProvider implements
AutoConfigurationCustomizerProvider {
@Override
public void customize(AutoConfigurationCustomizer customizer) {
customizer.addMeterProviderCustomizer(((sdkMeterProviderBuilder,
configProperties) -> {
sdkMeterProviderBuilder.registerView(InstrumentSelector.builder()
.setName("pulsar.broker.topic.publish.latency").build(),
View.builder()
.setAggregation(Aggregation.explicitBucketHistogram(Arrays.asList(0.001,
30.0))).build());
return sdkMeterProviderBuilder;
}));
}
}
```
```
$ PULSAR_EXTRA_CLASSPATH='path/to/custom-provider.jar' PULSAR_EXTRA_OPTS='
-Dotel.sdk.disabled=false -Dotel.metrics.exporter=prometheus ' ./bin/pulsar
standalone
```
ref.
* https://opentelemetry.io/docs/languages/java/sdk/#views
*
https://opentelemetry.io/docs/languages/java/configuration/#zero-code-sdk-autoconfigure
* The `pulsar-opentelemetry` uses AutoConfiguredOpenTelemetrySdk. So, we
can use AutoConfigurationCustomizerProvider
https://github.com/apache/pulsar/blob/v4.1.1/pulsar-opentelemetry/src/main/java/org/apache/pulsar/opentelemetry/OpenTelemetryService.java#L72
*
https://opentelemetry.io/ja/docs/languages/java/configuration/#autoconfigurationcustomizerprovider
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