metrics

type CounterAlias string

type CounterMetadata struct {
	CounterType       CounterAlias
	CounterName       string
	CounterNameSpace  func(string) string
	CounterSubSystem  string
	CounterHelpString string
	CounterLabels     []string
	CounterFunction   func(db *gorm.DB) func() float64
	CounterBuckets    []float64
}

type CounterOpts struct {
	Name      string
	Namespace string
	Subsystem string
	Help      string
	Labels    []string
}

type CounterType struct {
	GaugeFunc    CounterAlias
	CounterVec   CounterAlias
	GaugeVec     CounterAlias
	SummaryVec   CounterAlias
	HistogramVec CounterAlias
}

type GaugeOpts struct {
	Name      string
	Namespace string
	Subsystem string
	Help      string
	Labels    []string
}

type HistogramOpts struct {
	Name      string
	Namespace string
	Subsystem string
	Help      string
	Labels    []string
	Buckets   []float64
}

type MetricsExporter struct {
	FlushInterval time.Duration

	ServiceName string
	// contains filtered or unexported fields
}

type NewRegistry func(opts Options) Registry

type Options struct {
	FlushInterval          time.Duration
	EnableGoRuntimeMetrics bool
	DbConn                 *gorm.DB
	ServiceName            string
}

type Registry interface {
	// CreateGauge creates a gauge metric type
	CreateGauge(opts GaugeOpts) error
	// CreateCounter creates a counter metric type
	CreateCounter(opts CounterOpts) error
	// CreateSummary creates a summary metric type
	CreateSummary(opts SummaryOpts) error
	// CreateHistogram creates a histogram metric type
	CreateHistogram(opts HistogramOpts) error
	// CreateGaugeFunc create a gauge function metric type
	CreateGaugeFunc(opts GaugeOpts, f func() float64) error

	// GaugeSet sets a gauge counter type to a value specified by val
	GaugeSet(name string, val float64, labels map[string]string) error
	// CounterAdd sets a gauge counter to a value specified by val
	CounterAdd(name string, val float64, labels map[string]string) error
	// SummaryObserve specifies a counter of summary type
	SummaryObserve(name string, val float64, Labels map[string]string) error
	// HistogramObserve set/increments a histogram counter type
	HistogramObserve(name string, val float64, labels map[string]string) error
	// ObtainGaugeFunc attempts to obtain a gauge function by name
	ObtainGaugeFunc(name string) (*prometheus.GaugeFunc, error)
	// Monitor observes the request size and latency associated with a specific route and records it in a summary vector metric
	Monitor(next http.Handler) http.Handler
}

type SummaryOpts struct {
	Name       string
	Namespace  string
	Subsystem  string
	Help       string
	Labels     []string
	Objectives map[float64]float64
}