micro/meter/options.go

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package meter
import (
"context"
"github.com/unistack-org/micro/v3/logger"
)
// Option powers the configuration for metrics implementations:
type Option func(*Options)
// Options for metrics implementations:
type Options struct {
Address string
Path string
Labels Labels
//TimingObjectives map[float64]float64
Logger logger.Logger
Context context.Context
MetricPrefix string
LabelPrefix string
}
// NewOptions prepares a set of options:
func NewOptions(opt ...Option) Options {
opts := Options{
Address: DefaultAddress,
Path: DefaultPath,
Context: context.Background(),
Logger: logger.DefaultLogger,
MetricPrefix: DefaultMetricPrefix,
LabelPrefix: DefaultLabelPrefix,
}
for _, o := range opt {
o(&opts)
}
return opts
}
// Context sets the metrics context
func Context(ctx context.Context) Option {
return func(o *Options) {
o.Context = ctx
}
}
// Path used to serve metrics over HTTP
func Path(value string) Option {
return func(o *Options) {
o.Path = value
}
}
// Address is the listen address to serve metrics
func Address(value string) Option {
return func(o *Options) {
o.Address = value
}
}
/*
// Labels be added to every metric
func Labels(labels []string) Option {
return func(o *Options) {
o.Labels = labels
}
}
*/
/*
// TimingObjectives defines the desired spread of statistics for histogram / timing metrics:
func TimingObjectives(value map[float64]float64) Option {
return func(o *Options) {
o.TimingObjectives = value
}
}
*/
// Logger sets the logger
func Logger(l logger.Logger) Option {
return func(o *Options) {
o.Logger = l
}
}
// Label sets the label
func Label(key, val string) Option {
return func(o *Options) {
o.Labels.keys = append(o.Labels.keys, key)
o.Labels.vals = append(o.Labels.vals, val)
}
}