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https://github.com/open-telemetry/opentelemetry-go.git
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52 lines
1.8 KiB
Go
52 lines
1.8 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package aggregator // import "go.opentelemetry.io/otel/sdk/metric/aggregator"
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import (
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"fmt"
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"math"
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"go.opentelemetry.io/otel/api/metric"
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export "go.opentelemetry.io/otel/sdk/export/metric"
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"go.opentelemetry.io/otel/sdk/export/metric/aggregation"
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)
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// NewInconsistentAggregatorError formats an error describing an attempt to
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// Checkpoint or Merge different-type aggregators. The result can be unwrapped as
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// an ErrInconsistentType.
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func NewInconsistentAggregatorError(a1, a2 export.Aggregator) error {
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return fmt.Errorf("%w: %T and %T", aggregation.ErrInconsistentType, a1, a2)
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}
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// RangeTest is a commmon routine for testing for valid input values.
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// This rejects NaN values. This rejects negative values when the
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// metric instrument does not support negative values, including
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// monotonic counter metrics and absolute ValueRecorder metrics.
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func RangeTest(number metric.Number, descriptor *metric.Descriptor) error {
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numberKind := descriptor.NumberKind()
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if numberKind == metric.Float64NumberKind && math.IsNaN(number.AsFloat64()) {
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return aggregation.ErrNaNInput
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}
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switch descriptor.MetricKind() {
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case metric.CounterKind, metric.SumObserverKind:
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if number.IsNegative(numberKind) {
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return aggregation.ErrNegativeInput
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}
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}
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return nil
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}
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