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METRICS SDK - Calling Observable Instruments callback during metrics …
…collection (open-telemetry#1554)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| #ifndef ENABLE_METRICS_PREVIEW | ||
| # include "opentelemetry/sdk/metrics/meter.h" | ||
| # include "opentelemetry/sdk/metrics/data/point_data.h" | ||
| # include "opentelemetry/sdk/metrics/meter_context.h" | ||
| # include "opentelemetry/sdk/metrics/meter_provider.h" | ||
| # include "opentelemetry/sdk/metrics/metric_reader.h" | ||
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| # include <gtest/gtest.h> | ||
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| using namespace opentelemetry; | ||
| using namespace opentelemetry::sdk::instrumentationscope; | ||
| using namespace opentelemetry::sdk::metrics; | ||
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| class MockMetricReader : public MetricReader | ||
| { | ||
| public: | ||
| MockMetricReader() = default; | ||
| AggregationTemporality GetAggregationTemporality( | ||
| InstrumentType instrument_type) const noexcept override | ||
| { | ||
| return AggregationTemporality::kCumulative; | ||
| } | ||
| bool OnShutDown(std::chrono::microseconds timeout) noexcept override { return true; } | ||
| bool OnForceFlush(std::chrono::microseconds timeout) noexcept override { return true; } | ||
| void OnInitialized() noexcept override {} | ||
| }; | ||
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| namespace | ||
| { | ||
| nostd::shared_ptr<metrics::Meter> InitMeter(MetricReader **metricReaderPtr) | ||
| { | ||
| static std::shared_ptr<metrics::MeterProvider> provider(new MeterProvider()); | ||
| std::unique_ptr<MetricReader> metric_reader(new MockMetricReader()); | ||
| *metricReaderPtr = metric_reader.get(); | ||
| auto p = std::static_pointer_cast<MeterProvider>(provider); | ||
| p->AddMetricReader(std::move(metric_reader)); | ||
| auto meter = provider->GetMeter("meter_name"); | ||
| return meter; | ||
| } | ||
| } // namespace | ||
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| void asyc_generate_measurements(opentelemetry::metrics::ObserverResult observer, void *state) | ||
| { | ||
| auto observer_long = | ||
| nostd::get<nostd::shared_ptr<opentelemetry::metrics::ObserverResultT<long>>>(observer); | ||
| observer_long->Observe(10l); | ||
| } | ||
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| TEST(MeterTest, BasicAsyncTests) | ||
| { | ||
| MetricReader *metric_reader_ptr = nullptr; | ||
| auto meter = InitMeter(&metric_reader_ptr); | ||
| auto observable_counter = meter->CreateLongObservableCounter("observable_counter"); | ||
| observable_counter->AddCallback(asyc_generate_measurements, nullptr); | ||
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| size_t count = 0; | ||
| metric_reader_ptr->Collect([&count](ResourceMetrics &metric_data) { | ||
| EXPECT_EQ(metric_data.scope_metric_data_.size(), 1); | ||
| if (metric_data.scope_metric_data_.size()) | ||
| { | ||
| EXPECT_EQ(metric_data.scope_metric_data_[0].metric_data_.size(), 1); | ||
| if (metric_data.scope_metric_data_.size()) | ||
| { | ||
| count += metric_data.scope_metric_data_[0].metric_data_.size(); | ||
| EXPECT_EQ(count, 1); | ||
| } | ||
| } | ||
| return true; | ||
| }); | ||
| } | ||
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| #endif |