/
config.go
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/
config.go
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// Copyright The OpenTelemetry 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 otelbeego // import "go.opentelemetry.io/contrib/instrumentation/github.com/astaxie/beego/otelbeego"
import (
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
// config provides configuration for the beego OpenTelemetry
// middleware. Configuration is modified using the provided Options.
type config struct {
tracerProvider trace.TracerProvider
meterProvider metric.MeterProvider
propagators propagation.TextMapPropagator
filters []Filter
formatter SpanNameFormatter
}
// Option applies a configuration to the given config.
type Option interface {
apply(*config)
}
// optionFunc is a function type that applies a particular
// configuration to the beego middleware in question.
type optionFunc func(c *config)
// Apply will apply the option to the config, c.
func (o optionFunc) apply(c *config) {
o(c)
}
// ------------------------------------------ Options
// WithTracerProvider specifies a tracer provider to use for creating a tracer.
// If none is specified, the global provider is used.
func WithTracerProvider(provider trace.TracerProvider) Option {
return optionFunc(func(cfg *config) {
if provider != nil {
cfg.tracerProvider = provider
}
})
}
// WithMeterProvider specifies a meter provider to use for creating a meter.
// If none is specified, the global provider is used.
func WithMeterProvider(provider metric.MeterProvider) Option {
return optionFunc(func(cfg *config) {
if provider != nil {
cfg.meterProvider = provider
}
})
}
// WithPropagators sets the propagators used in the middleware.
// Defaults to global.Propagators().
func WithPropagators(propagators propagation.TextMapPropagator) Option {
return optionFunc(func(c *config) {
if propagators != nil {
c.propagators = propagators
}
})
}
// WithFilter adds the given filter for use in the middleware.
// Defaults to no filters.
func WithFilter(f Filter) Option {
return optionFunc(func(c *config) {
c.filters = append(c.filters, f)
})
}
// WithSpanNameFormatter sets the formatter to be used to format
// span names. Defaults to the path template.
func WithSpanNameFormatter(f SpanNameFormatter) Option {
return optionFunc(func(c *config) {
c.formatter = f
})
}
// ------------------------------------------ Private Functions
func newConfig(options ...Option) *config {
config := &config{
tracerProvider: otel.GetTracerProvider(),
meterProvider: global.MeterProvider(),
propagators: otel.GetTextMapPropagator(),
filters: []Filter{},
formatter: defaultSpanNameFormatter,
}
for _, option := range options {
option.apply(config)
}
return config
}