/
zipkin.go
77 lines (65 loc) · 1.89 KB
/
zipkin.go
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/*
* Copyright 2018 Comcast Cable Communications Management, LLC
*
* 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 provides a Zipkin Tracer
package zipkin
import (
"github.com/tricksterproxy/trickster/pkg/tracing"
errs "github.com/tricksterproxy/trickster/pkg/tracing/errors"
"github.com/tricksterproxy/trickster/pkg/tracing/options"
"go.opentelemetry.io/otel/exporters/trace/zipkin"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
// NewTracer returns a new Zipkin Tracer
func NewTracer(options *options.Options) (*tracing.Tracer, error) {
var tp *sdktrace.Provider
var err error
if options == nil {
return nil, errs.ErrNoTracerOptions
}
var sampler sdktrace.Sampler
switch options.SampleRate {
case 0:
sampler = sdktrace.NeverSample()
case 1:
sampler = sdktrace.AlwaysSample()
default:
sampler = sdktrace.ProbabilitySampler(options.SampleRate)
}
exporter, err := zipkin.NewExporter(
options.CollectorURL,
options.ServiceName,
)
if err != nil {
return nil, err
}
tp, err = sdktrace.NewProvider(
sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sampler}),
sdktrace.WithBatcher(exporter,
sdktrace.WithBatchTimeout(5),
sdktrace.WithMaxExportBatchSize(10),
),
)
if err != nil {
return nil, err
}
tracer := tp.Tracer(options.Name)
return &tracing.Tracer{
Name: options.Name,
Tracer: tracer,
Options: options,
Flusher: nil,
}, nil
}