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40 lines
1.1 KiB
40 lines
1.1 KiB
3 months ago
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// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package metric // import "go.opentelemetry.io/otel/sdk/metric"
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import (
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"os"
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"strconv"
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"time"
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"go.opentelemetry.io/otel/internal/global"
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)
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// Environment variable names.
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const (
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// The time interval (in milliseconds) between the start of two export attempts.
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envInterval = "OTEL_METRIC_EXPORT_INTERVAL"
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// Maximum allowed time (in milliseconds) to export data.
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envTimeout = "OTEL_METRIC_EXPORT_TIMEOUT"
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)
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// envDuration returns an environment variable's value as duration in milliseconds if it is exists,
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// or the defaultValue if the environment variable is not defined or the value is not valid.
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func envDuration(key string, defaultValue time.Duration) time.Duration {
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v := os.Getenv(key)
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if v == "" {
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return defaultValue
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}
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d, err := strconv.Atoi(v)
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if err != nil {
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global.Error(err, "parse duration", "environment variable", key, "value", v)
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return defaultValue
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}
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if d <= 0 {
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global.Error(errNonPositiveDuration, "non-positive duration", "environment variable", key, "value", v)
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return defaultValue
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}
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return time.Duration(d) * time.Millisecond
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}
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