io.opentelemetry.sdk.metrics.SdkMeterProviderBuilder Maven / Gradle / Ivy
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
package io.opentelemetry.sdk.metrics;
import io.opentelemetry.sdk.common.Clock;
import io.opentelemetry.sdk.metrics.export.MetricReader;
import io.opentelemetry.sdk.metrics.internal.SdkMeterProviderUtil;
import io.opentelemetry.sdk.metrics.internal.debug.SourceInfo;
import io.opentelemetry.sdk.metrics.internal.exemplar.ExemplarFilter;
import io.opentelemetry.sdk.metrics.internal.view.RegisteredView;
import io.opentelemetry.sdk.resources.Resource;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
/**
* Builder class for the {@link SdkMeterProvider}.
*
* @since 1.14.0
*/
public final class SdkMeterProviderBuilder {
/**
* By default, the exemplar filter is set to sample with traces.
*
* @see #setExemplarFilter(ExemplarFilter)
*/
private static final ExemplarFilter DEFAULT_EXEMPLAR_FILTER = ExemplarFilter.traceBased();
private Clock clock = Clock.getDefault();
private Resource resource = Resource.getDefault();
private final List metricReaders = new ArrayList<>();
private final List registeredViews = new ArrayList<>();
private ExemplarFilter exemplarFilter = DEFAULT_EXEMPLAR_FILTER;
SdkMeterProviderBuilder() {}
/**
* Assign a {@link Clock}.
*
* @param clock The clock to use for all temporal needs.
*/
public SdkMeterProviderBuilder setClock(Clock clock) {
Objects.requireNonNull(clock, "clock");
this.clock = clock;
return this;
}
/** Assign a {@link Resource} to be attached to all metrics. */
public SdkMeterProviderBuilder setResource(Resource resource) {
Objects.requireNonNull(resource, "resource");
this.resource = resource;
return this;
}
/**
* Assign an {@link ExemplarFilter} for all metrics created by Meters.
*
* Note: not currently stable but available for experimental use via {@link
* SdkMeterProviderUtil#setExemplarFilter(SdkMeterProviderBuilder, ExemplarFilter)}.
*/
SdkMeterProviderBuilder setExemplarFilter(ExemplarFilter filter) {
this.exemplarFilter = filter;
return this;
}
/**
* Register a {@link View}.
*
*
The {@code view} influences how instruments which match the {@code selector} are aggregated
* and exported.
*
*
For example, the following code registers a view which changes all histogram instruments to
* aggregate with bucket boundaries different from the default:
*
*
{@code
* // create a SdkMeterProviderBuilder
* SdkMeterProviderBuilder meterProviderBuilder = SdkMeterProvider.builder();
*
* // register the view with the SdkMeterProviderBuilder
* meterProviderBuilder.registerView(
* InstrumentSelector instrumentSelector = InstrumentSelector.builder()
* .setType(InstrumentType.HISTOGRAM)
* .build(),
* View.builder()
* .setAggregation(
* Aggregation.explicitBucketHistogram(Arrays.asList(10d, 20d, 30d, 40d, 50d)))
* .build());
* }
*/
public SdkMeterProviderBuilder registerView(InstrumentSelector selector, View view) {
Objects.requireNonNull(selector, "selector");
Objects.requireNonNull(view, "view");
registeredViews.add(
RegisteredView.create(
selector, view, view.getAttributesProcessor(), SourceInfo.fromCurrentStack()));
return this;
}
/**
* Registers a {@link MetricReader}.
*
* Note: custom implementations of {@link MetricReader} are not currently supported.
*/
public SdkMeterProviderBuilder registerMetricReader(MetricReader reader) {
metricReaders.add(reader);
return this;
}
/** Returns an {@link SdkMeterProvider} built with the configuration of this builder. */
public SdkMeterProvider build() {
return new SdkMeterProvider(registeredViews, metricReaders, clock, resource, exemplarFilter);
}
}