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init.go
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init.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package tracing
import (
"fmt"
"time"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-client-go/rpcmetrics"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/uber/jaeger/examples/hotrod/pkg/log"
)
// Init creates a new instance of Jaeger tracer.
func Init(serviceName string, metricsFactory metrics.Factory, logger log.Factory) opentracing.Tracer {
cfg := config.Configuration{
Sampler: &config.SamplerConfig{
Type: "const",
Param: 1,
},
Reporter: &config.ReporterConfig{
LogSpans: false,
BufferFlushInterval: 1 * time.Second,
},
}
tracer, _, err := cfg.New(
serviceName,
config.Logger(jaegerLoggerAdapter{logger.Bg()}),
config.Observer(rpcmetrics.NewObserver(metricsFactory, rpcmetrics.DefaultNameNormalizer)),
)
if err != nil {
logger.Bg().Fatal("cannot initialize Jaeger Tracer", zap.Error(err))
}
return tracer
}
type jaegerLoggerAdapter struct {
logger log.Logger
}
func (l jaegerLoggerAdapter) Error(msg string) {
l.logger.Error(msg)
}
func (l jaegerLoggerAdapter) Infof(msg string, args ...interface{}) {
l.logger.Info(fmt.Sprintf(msg, args...))
}