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sum.go
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sum.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http:https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// nolint:gocritic
package serialization // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/dynatraceexporter/internal/serialization"
import (
"fmt"
dtMetric "github.com/dynatrace-oss/dynatrace-metric-utils-go/metric"
"github.com/dynatrace-oss/dynatrace-metric-utils-go/metric/dimensions"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/pmetric"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/common/ttlmap"
)
func serializeSum(name, prefix string, dims dimensions.NormalizedDimensionList, t pmetric.MetricAggregationTemporality, dp pmetric.NumberDataPoint, prev *ttlmap.TTLMap) (string, error) {
switch t {
case pmetric.MetricAggregationTemporalityCumulative:
return serializeCumulativeCounter(name, prefix, dims, dp, prev)
// for now unspecified is treated as delta
case pmetric.MetricAggregationTemporalityUnspecified:
fallthrough
case pmetric.MetricAggregationTemporalityDelta:
return serializeDeltaCounter(name, prefix, dims, dp)
}
return "", nil
}
func serializeDeltaCounter(name, prefix string, dims dimensions.NormalizedDimensionList, dp pmetric.NumberDataPoint) (string, error) {
var valueOpt dtMetric.MetricOption
switch dp.ValueType() {
case pmetric.NumberDataPointValueTypeNone:
return "", fmt.Errorf("unsupported value type none")
case pmetric.NumberDataPointValueTypeInt:
valueOpt = dtMetric.WithIntCounterValueDelta(dp.IntVal())
case pmetric.NumberDataPointValueTypeDouble:
valueOpt = dtMetric.WithFloatCounterValueDelta(dp.DoubleVal())
default:
return "", fmt.Errorf("unknown data type")
}
dm, err := dtMetric.NewMetric(
name,
dtMetric.WithPrefix(prefix),
dtMetric.WithDimensions(dims),
dtMetric.WithTimestamp(dp.Timestamp().AsTime()),
valueOpt,
)
if err != nil {
return "", err
}
return dm.Serialize()
}
func serializeCumulativeCounter(name, prefix string, dims dimensions.NormalizedDimensionList, dp pmetric.NumberDataPoint, prev *ttlmap.TTLMap) (string, error) {
dm, err := convertTotalCounterToDelta(name, prefix, dims, dp, prev)
if err != nil {
return "", err
}
if dm == nil {
return "", nil
}
return dm.Serialize()
}
func convertTotalCounterToDelta(name, prefix string, dims dimensions.NormalizedDimensionList, dp pmetric.NumberDataPoint, prevCounters *ttlmap.TTLMap) (*dtMetric.Metric, error) {
id := name
dp.Attributes().Sort().Range(func(k string, v pcommon.Value) bool {
id += fmt.Sprintf(",%s=%s", k, v.AsString())
return true
})
prevCounter := prevCounters.Get(id)
if prevCounter == nil {
prevCounters.Put(id, dp)
return nil, nil
}
oldCount := prevCounter.(pmetric.NumberDataPoint)
if oldCount.Timestamp().AsTime().After(dp.Timestamp().AsTime()) {
// current point is older than the previous point
return nil, nil
}
var valueOpt dtMetric.MetricOption
if dp.ValueType() != oldCount.ValueType() {
prevCounters.Put(id, dp)
return nil, fmt.Errorf("expected %s to be type %s but got %s - count reset", name, metricValueTypeToString(oldCount.ValueType()), metricValueTypeToString(dp.ValueType()))
}
if dp.ValueType() == pmetric.NumberDataPointValueTypeInt {
valueOpt = dtMetric.WithIntCounterValueDelta(dp.IntVal() - oldCount.IntVal())
} else if dp.ValueType() == pmetric.NumberDataPointValueTypeDouble {
valueOpt = dtMetric.WithFloatCounterValueDelta(dp.DoubleVal() - oldCount.DoubleVal())
} else {
return nil, fmt.Errorf("%s value type %s not supported", name, metricValueTypeToString(dp.ValueType()))
}
dm, err := dtMetric.NewMetric(
name,
dtMetric.WithPrefix(prefix),
dtMetric.WithDimensions(dims),
dtMetric.WithTimestamp(dp.Timestamp().AsTime()),
valueOpt,
)
if err != nil {
return dm, err
}
prevCounters.Put(id, dp)
return dm, err
}
func metricValueTypeToString(t pmetric.NumberDataPointValueType) string {
switch t {
case pmetric.NumberDataPointValueTypeDouble:
return "MetricValueTypeDouble"
case pmetric.NumberDataPointValueTypeInt:
return "MericValueTypeInt"
case pmetric.NumberDataPointValueTypeNone:
return "MericValueTypeNone"
default:
return "MetricValueTypeUnknown"
}
}