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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package prometheus_test
import (
"go.opentelemetry.io/contrib/bridges/prometheus"
"go.opentelemetry.io/otel/sdk/metric"
)
func ExampleNewMetricProducer() {
// Create a Promethes bridge "Metric Producer" which adds metrics from the
// prometheus.DefaultGatherer. Add the WithGatherer option to add metrics
// from other registries.
bridge := prometheus.NewMetricProducer()
// This reader is used as a stand-in for a reader that will actually export
// data. See https://pkg.go.dev/go.opentelemetry.io/otel/exporters for
// exporters that can be used as or with readers. The metric.WithProducer
// option adds metrics from the Prometheus bridge to the reader.
reader := metric.NewManualReader(metric.WithProducer(bridge))
// Create an OTel MeterProvider with our reader. Metrics from OpenTelemetry
// instruments are combined with metrics from Prometheus instruments in
// exported batches of metrics.
_ = metric.NewMeterProvider(metric.WithReader(reader))
}
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