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metric_readers.go
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/
metric_readers.go
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// Copyright 2023 Dimitrij Drus <dadrus@gmx.de>
//
// 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://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.
//
// SPDX-License-Identifier: Apache-2.0
package exporters
import (
"context"
"os"
"strings"
"go.opentelemetry.io/otel/sdk/metric"
)
// NewMetricReaders returns a slice of metric.Reader defined by the
// OTEL_METRICS_EXPORTER environment variable. An "otel" Exporter is returned
// if no exporter is defined for the environment variable. A no-op
// Exporter will be returned if "none" is defined anywhere in the
// environment variable.
func NewMetricReaders(ctx context.Context) ([]metric.Reader, error) {
exporterNames, ok := os.LookupEnv("OTEL_METRICS_EXPORTER")
if !ok {
return createMetricsReaders(ctx)
}
return createMetricsReaders(ctx, strings.Split(exporterNames, ",")...)
}