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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#pragma once
#ifndef ENABLE_METRICS_PREVIEW
# include "opentelemetry/context/context.h"
# include "opentelemetry/sdk/common/attribute_utils.h"
OPENTELEMETRY_BEGIN_NAMESPACE
namespace sdk
{
namespace metrics
{
using MetricAttributes = opentelemetry::sdk::common::OrderedAttributeMap;
/**
* Exemplar filters are used to pre-filter measurements before attempting to store them in a
* reservoir.
*/
class ExemplarFilter
{
public:
// Returns whether or not a reservoir should attempt to filter a measurement.
virtual bool ShouldSampleMeasurement(long value,
const MetricAttributes &attributes,
const opentelemetry::context::Context &context) noexcept = 0;
// Returns whether or not a reservoir should attempt to filter a measurement.
virtual bool ShouldSampleMeasurement(double value,
const MetricAttributes &attributes,
const opentelemetry::context::Context &context) noexcept = 0;
virtual ~ExemplarFilter() = default;
};
} // namespace metrics
} // namespace sdk
OPENTELEMETRY_END_NAMESPACE
#endif
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