forked from jaegertracing/jaeger
/
init.go
84 lines (76 loc) · 2.49 KB
/
init.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 tracing
import (
"fmt"
"strings"
"time"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-client-go/rpcmetrics"
"github.com/uber/jaeger-client-go/transport"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/examples/hotrod/pkg/log"
)
// Init creates a new instance of Jaeger tracer.
func Init(serviceName string, metricsFactory metrics.Factory, logger log.Factory, backendHostPort string) opentracing.Tracer {
cfg := config.Configuration{
Sampler: &config.SamplerConfig{
Type: "const",
Param: 1,
},
}
// TODO(ys) a quick hack to ensure random generators get different seeds, which are based on current time.
time.Sleep(100 * time.Millisecond)
jaegerLogger := jaegerLoggerAdapter{logger.Bg()}
var sender jaeger.Transport
if strings.HasPrefix(backendHostPort, "http://") {
sender = transport.NewHTTPTransport(
backendHostPort,
transport.HTTPBatchSize(1),
)
} else {
if s, err := jaeger.NewUDPTransport(backendHostPort, 0); err != nil {
logger.Bg().Fatal("cannot initialize UDP sender", zap.Error(err))
} else {
sender = s
}
}
tracer, _, err := cfg.New(
serviceName,
config.Reporter(jaeger.NewRemoteReporter(
sender,
jaeger.ReporterOptions.BufferFlushInterval(1*time.Second),
jaeger.ReporterOptions.Logger(jaegerLogger),
)),
config.Logger(jaegerLogger),
config.Metrics(metricsFactory),
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...))
}