package meter import ( "context" "go.unistack.org/micro/v4/logger" ) // Option powers the configuration for metrics implementations: type Option func(*Options) // Options for metrics implementations type Options struct { // Logger used for logging Logger logger.Logger // Context holds external options Context context.Context // Name holds the meter name Name string // Address holds the address that serves metrics Address string // Path holds the path for metrics Path string // MetricPrefix holds the prefix for all metrics MetricPrefix string // LabelPrefix holds the prefix for all labels LabelPrefix string // Labels holds the default labels Labels []string // WriteProcessMetrics flag to write process metrics WriteProcessMetrics bool // WriteFDMetrics flag to write fd metrics WriteFDMetrics bool } // 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 } // LabelPrefix sets the labels prefix func LabelPrefix(pref string) Option { return func(o *Options) { o.LabelPrefix = pref } } // MetricPrefix sets the metric prefix func MetricPrefix(pref string) Option { return func(o *Options) { o.MetricPrefix = pref } } // 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 } } /* // 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 } } // Labels sets the meter labels func Labels(ls ...string) Option { return func(o *Options) { o.Labels = append(o.Labels, ls...) } } // Name sets the name func Name(n string) Option { return func(o *Options) { o.Name = n } } // WriteProcessMetrics enable process metrics output for write func WriteProcessMetrics(b bool) Option { return func(o *Options) { o.WriteProcessMetrics = b } } // WriteFDMetrics enable fd metrics output for write func WriteFDMetrics(b bool) Option { return func(o *Options) { o.WriteFDMetrics = b } }