// Copyright 2020 Douyu
//
// 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 trace

import (
	"context"

	"github.com/douyu/jupiter/pkg/xlog"
	"github.com/opentracing/opentracing-go"
	"github.com/opentracing/opentracing-go/log"
)

var (
	// String ...
	String = log.String
)

// SetGlobalTracer ...
func SetGlobalTracer(tracer opentracing.Tracer) {
	xlog.Info("set global tracer", xlog.FieldMod("trace"))
	opentracing.SetGlobalTracer(tracer)
}

// Start ...
func StartSpanFromContext(ctx context.Context, op string, opts ...opentracing.StartSpanOption) (opentracing.Span, context.Context) {
	return opentracing.StartSpanFromContext(ctx, op, opts...)
}

// SpanFromContext ...
func SpanFromContext(ctx context.Context) opentracing.Span {
	return opentracing.SpanFromContext(ctx)
}
