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[EXPORTER] Set is_monotonic flag for Observable Counters #2478

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Jan 8, 2024
Merged

[EXPORTER] Set is_monotonic flag for Observable Counters #2478

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aa3a3fa
Set is_monotonic flag for Observable Counters
samin36 Jan 6, 2024
f5c6e07
Update changelog
samin36 Jan 6, 2024
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,8 @@ Increment the:
[#2449](https://github.com/open-telemetry/opentelemetry-cpp/pull/2449)
* [BUILD] Introduce CXX 20 CI pipeline for MSVC/Windows
[#2450](https://github.com/open-telemetry/opentelemetry-cpp/pull/2450)
* [EXPORTER] Set `is_monotonic` flag for Observable Counters
[#2478](https://github.com/open-telemetry/opentelemetry-cpp/pull/2478)

Important changes:

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5 changes: 3 additions & 2 deletions exporters/otlp/src/otlp_metric_utils.cc
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Expand Up @@ -54,8 +54,9 @@ void OtlpMetricUtils::ConvertSumMetric(const metric_sdk::MetricData &metric_data
{
sum->set_aggregation_temporality(
GetProtoAggregationTemporality(metric_data.aggregation_temporality));
sum->set_is_monotonic(metric_data.instrument_descriptor.type_ ==
metric_sdk::InstrumentType::kCounter);
sum->set_is_monotonic(
(metric_data.instrument_descriptor.type_ == metric_sdk::InstrumentType::kCounter) ||
(metric_data.instrument_descriptor.type_ == metric_sdk::InstrumentType::kObservableCounter));
auto start_ts = metric_data.start_ts.time_since_epoch().count();
auto ts = metric_data.end_ts.time_since_epoch().count();
for (auto &point_data_with_attributes : metric_data.point_data_attr_)
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91 changes: 91 additions & 0 deletions exporters/otlp/test/otlp_metrics_serialization_test.cc
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Expand Up @@ -130,6 +130,66 @@ static metrics_sdk::MetricData CreateObservableGaugeAggregationData()
return data;
}

static metrics_sdk::MetricData CreateObservableCounterAggregationData()
{
metrics_sdk::MetricData data;
data.start_ts = opentelemetry::common::SystemTimestamp(std::chrono::system_clock::now());
metrics_sdk::InstrumentDescriptor inst_desc = {
"ObservableCounter", "test description", "test unit",
metrics_sdk::InstrumentType::kObservableCounter, metrics_sdk::InstrumentValueType::kDouble};
metrics_sdk::SumPointData s_data_1, s_data_2;
s_data_1.value_ = 1.23;
s_data_2.value_ = 4.56;

data.aggregation_temporality = metrics_sdk::AggregationTemporality::kCumulative;
data.end_ts = opentelemetry::common::SystemTimestamp(std::chrono::system_clock::now());
data.instrument_descriptor = inst_desc;
metrics_sdk::PointDataAttributes point_data_attr_1, point_data_attr_2;
point_data_attr_1.attributes = {{"key1", "value1"}};
point_data_attr_1.point_data = s_data_1;

point_data_attr_2.attributes = {{"key2", "value2"}};
point_data_attr_2.point_data = s_data_2;
std::vector<metrics_sdk::PointDataAttributes> point_data_attr;
point_data_attr.push_back(point_data_attr_1);
point_data_attr.push_back(point_data_attr_2);
data.point_data_attr_ = std::move(point_data_attr);
return data;
}

static metrics_sdk::MetricData CreateObservableUpDownCounterAggregationData()
{
metrics_sdk::MetricData data;
data.start_ts = opentelemetry::common::SystemTimestamp(std::chrono::system_clock::now());
metrics_sdk::InstrumentDescriptor inst_desc = {
"ObservableUpDownCounter", "test description", "test unit",
metrics_sdk::InstrumentType::kObservableUpDownCounter,
metrics_sdk::InstrumentValueType::kDouble};
metrics_sdk::SumPointData s_data_1, s_data_2, s_data_3;
s_data_1.value_ = 1.23;
s_data_2.value_ = 4.56;
s_data_3.value_ = 2.34;

data.aggregation_temporality = metrics_sdk::AggregationTemporality::kCumulative;
data.end_ts = opentelemetry::common::SystemTimestamp(std::chrono::system_clock::now());
data.instrument_descriptor = inst_desc;
metrics_sdk::PointDataAttributes point_data_attr_1, point_data_attr_2, point_data_attr_3;
point_data_attr_1.attributes = {{"key1", "value1"}};
point_data_attr_1.point_data = s_data_1;

point_data_attr_2.attributes = {{"key2", "value2"}};
point_data_attr_2.point_data = s_data_2;

point_data_attr_3.attributes = {{"key3", "value3"}};
point_data_attr_3.point_data = s_data_3;
std::vector<metrics_sdk::PointDataAttributes> point_data_attr;
point_data_attr.push_back(point_data_attr_1);
point_data_attr.push_back(point_data_attr_2);
point_data_attr.push_back(point_data_attr_3);
data.point_data_attr_ = std::move(point_data_attr);
return data;
}

TEST(OtlpMetricSerializationTest, Counter)
{
metrics_sdk::MetricData data = CreateSumAggregationData();
Expand Down Expand Up @@ -191,6 +251,37 @@ TEST(OtlpMetricSerializationTest, ObservableGauge)
EXPECT_EQ(1, 1);
}

TEST(OtlpMetricSerializationTest, ObservableCounter)
{
metrics_sdk::MetricData data = CreateObservableCounterAggregationData();
opentelemetry::proto::metrics::v1::Sum sum;
otlp_exporter::OtlpMetricUtils::ConvertSumMetric(data, &sum);
EXPECT_EQ(sum.aggregation_temporality(),
proto::metrics::v1::AggregationTemporality::AGGREGATION_TEMPORALITY_CUMULATIVE);
EXPECT_EQ(sum.is_monotonic(), true);
EXPECT_EQ(sum.data_points_size(), 2);
EXPECT_EQ(sum.data_points(0).as_double(), 1.23);
EXPECT_EQ(sum.data_points(1).as_double(), 4.56);

EXPECT_EQ(1, 1);
}

TEST(OtlpMetricSerializationTest, ObservableUpDownCounter)
{
metrics_sdk::MetricData data = CreateObservableUpDownCounterAggregationData();
opentelemetry::proto::metrics::v1::Sum sum;
otlp_exporter::OtlpMetricUtils::ConvertSumMetric(data, &sum);
EXPECT_EQ(sum.aggregation_temporality(),
proto::metrics::v1::AggregationTemporality::AGGREGATION_TEMPORALITY_CUMULATIVE);
EXPECT_EQ(sum.is_monotonic(), false);
EXPECT_EQ(sum.data_points_size(), 3);
EXPECT_EQ(sum.data_points(0).as_double(), 1.23);
EXPECT_EQ(sum.data_points(1).as_double(), 4.56);
EXPECT_EQ(sum.data_points(2).as_double(), 2.34);

EXPECT_EQ(1, 1);
}

} // namespace otlp
} // namespace exporter
OPENTELEMETRY_END_NAMESPACE