// Copyright 2020, 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.
//

import Foundation

/// A factory for creating named Tracers.
public protocol TracerProvider {
    /// Gets or creates a named tracer instance.
    /// - Parameters:
    ///   - instrumentationName: the name of the instrumentation library, not the name of the instrumented library
    ///   - instrumentationVersion:  The version of the instrumentation library (e.g., "semver:1.0.0"). Optional
    func get(instrumentationName: String, instrumentationVersion: String?) -> Tracer
}

extension TracerProvider {
    func get(instrumentationName: String) -> Tracer {
        return get(instrumentationName: instrumentationName, instrumentationVersion: nil)
    }
}
