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options.go
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options.go
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// Copyright 2022 CloudWeGo 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.
package tracing
import (
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
const (
instrumentationName = "github.com/kitex-contrib/obs-opentelemetry"
)
// Option opts for opentelemetry tracer provider
type Option interface {
apply(cfg *config)
}
type option func(cfg *config)
func (fn option) apply(cfg *config) {
fn(cfg)
}
type config struct {
tracer trace.Tracer
meter metric.Meter
tracerProvider trace.TracerProvider
meterProvider metric.MeterProvider
textMapPropagator propagation.TextMapPropagator
recordSourceOperation bool
}
func newConfig(opts []Option) *config {
cfg := defaultConfig()
for _, opt := range opts {
opt.apply(cfg)
}
cfg.meter = cfg.meterProvider.Meter(
instrumentationName,
metric.WithInstrumentationVersion(SemVersion()),
)
cfg.tracer = cfg.tracerProvider.Tracer(
instrumentationName,
trace.WithInstrumentationVersion(SemVersion()),
)
return cfg
}
func defaultConfig() *config {
return &config{
tracerProvider: otel.GetTracerProvider(),
meterProvider: otel.GetMeterProvider(),
textMapPropagator: otel.GetTextMapPropagator(),
}
}
// WithRecordSourceOperation configures record source operation dimension
func WithRecordSourceOperation(recordSourceOperation bool) Option {
return option(func(cfg *config) {
cfg.recordSourceOperation = recordSourceOperation
})
}
// WithTextMapPropagator configures propagation
func WithTextMapPropagator(p propagation.TextMapPropagator) Option {
return option(func(cfg *config) {
cfg.textMapPropagator = p
})
}