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opentelemetry-go/exporters/zipkin/env.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://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.
package zipkin // import "go.opentelemetry.io/otel/exporters/zipkin"
import "os"
// Environment variable names
const (
// Endpoint for Zipkin collector
envEndpoint = "OTEL_EXPORTER_ZIPKIN_ENDPOINT"
)
// envOr returns an env variable's value if it is exists or the default if not
func envOr(key, defaultValue string) string {
if v, ok := os.LookupEnv(key); ok && v != "" {
return v
}
return defaultValue
}