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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <memory>
#include "opentelemetry/metrics/async_instruments.h"
#include "opentelemetry/metrics/observer_result.h"
#include "opentelemetry/sdk/metrics/instruments.h"
#include "opentelemetry/version.h"
OPENTELEMETRY_BEGIN_NAMESPACE
namespace sdk
{
namespace metrics
{
class AsyncWritableMetricStorage;
class ObservableRegistry;
class ObservableInstrument : public opentelemetry::metrics::ObservableInstrument
{
public:
ObservableInstrument(InstrumentDescriptor instrument_descriptor,
std::unique_ptr<AsyncWritableMetricStorage> storage,
std::shared_ptr<ObservableRegistry> observable_registry);
void AddCallback(opentelemetry::metrics::ObservableCallbackPtr callback,
void *state) noexcept override;
void RemoveCallback(opentelemetry::metrics::ObservableCallbackPtr callback,
void *state) noexcept override;
const InstrumentDescriptor &GetInstrumentDescriptor();
AsyncWritableMetricStorage *GetMetricStorage();
private:
InstrumentDescriptor instrument_descriptor_;
std::unique_ptr<AsyncWritableMetricStorage> storage_;
std::shared_ptr<ObservableRegistry> observable_registry_;
};
} // namespace metrics
} // namespace sdk
OPENTELEMETRY_END_NAMESPACE