metrics

package
v0.12.0 Latest Latest
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 Go to latest Published: May 22, 2018 License: MIT Imports: 15 Imported by: 0

Documentation

Overview

Package metrics contains a type for aggregating and propagating metrics to various services based on configuration.

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrInvalidMetricOutputType = errors.New("invalid metrics output type")
)

Errors for the metrics package.

View Source 
var (
	ErrTimedOut = errors.New("timed out")
)

Errors for the HTTP type.

Functions

func Descriptions 

func Descriptions() string

Descriptions returns a formatted string of collated descriptions of each type.

func SanitiseConfig 

func SanitiseConfig(conf Config) (interface{}, error)

SanitiseConfig returns a sanitised version of the Config, meaning sections that aren't relevant to behaviour are removed.

Types

type Config 

type Config struct {
	Type       string       `json:"type" yaml:"type"`
	Prefix     string       `json:"prefix" yaml:"prefix"`
	HTTP       struct{}     `json:"http_server" yaml:"http_server"`
	Prometheus struct{}     `json:"prometheus" yaml:"prometheus"`
	Statsd     StatsdConfig `json:"statsd" yaml:"statsd"`
}

Config is the all encompassing configuration struct for all metric output types.

func NewConfig 

func NewConfig() Config

NewConfig returns a configuration struct fully populated with default values.

type DudStat 

type DudStat struct{}

DudStat implements the Stat interface but doesn't actual do anything.

func (DudStat) Decr 

func (d DudStat) Decr(count int64) error

Decr does nothing.

func (DudStat) Gauge 

func (d DudStat) Gauge(value int64) error

Gauge does nothing.

func (DudStat) Incr 

func (d DudStat) Incr(count int64) error

Incr does nothing.

func (DudStat) Timing 

func (d DudStat) Timing(delta int64) error

Timing does nothing.

type DudType 

type DudType struct{}

DudType implements the Type interface but doesn't actual do anything.

func (DudType) Close 

func (d DudType) Close() error

Close does nothing.

func (DudType) Decr 

func (d DudType) Decr(path string, count int64) error

Decr does nothing.

func (DudType) Gauge 

func (d DudType) Gauge(path string, value int64) error

Gauge does nothing.

func (DudType) GetCounter 

func (d DudType) GetCounter(path ...string) StatCounter

GetCounter returns a DudStat.

func (DudType) GetGauge 

func (d DudType) GetGauge(path ...string) StatGauge

GetGauge returns a DudStat.

func (DudType) GetTimer 

func (d DudType) GetTimer(path ...string) StatTimer

GetTimer returns a DudStat.

func (DudType) Incr 

func (d DudType) Incr(path string, count int64) error

Incr does nothing.

func (DudType) Timing 

func (d DudType) Timing(path string, delta int64) error

Timing does nothing.

type HTTP 

type HTTP struct {
	sync.Mutex
	// contains filtered or unexported fields
}

HTTP is an object with capability to hold internal stats as a JSON endpoint.

func (*HTTP) Close 

func (h *HTTP) Close() error

Close stops the HTTP object from aggregating metrics and cleans up resources.

func (*HTTP) Decr 

func (h *HTTP) Decr(stat string, value int64) error

Decr decrements a stat by a value.

func (*HTTP) Gauge 

func (h *HTTP) Gauge(stat string, value int64) error

Gauge sets a stat as a gauge value.

func (*HTTP) GetCounter 

func (h *HTTP) GetCounter(path ...string) StatCounter

GetCounter returns a stat counter object for a path.

func (*HTTP) GetGauge 

func (h *HTTP) GetGauge(path ...string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*HTTP) GetTimer 

func (h *HTTP) GetTimer(path ...string) StatTimer

GetTimer returns a stat timer object for a path.

func (*HTTP) HandlerFunc 

func (h *HTTP) HandlerFunc() http.HandlerFunc

HandlerFunc returns an http.HandlerFunc for accessing metrics as a JSON blob.

func (*HTTP) Incr 

func (h *HTTP) Incr(stat string, value int64) error

Incr increments a stat by a value.

func (*HTTP) Timing 

func (h *HTTP) Timing(stat string, delta int64) error

Timing sets a stat representing a duration.

type HTTPStat 

type HTTPStat struct {
	// contains filtered or unexported fields
}

HTTPStat is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*HTTPStat) Decr 

func (h *HTTPStat) Decr(count int64) error

Decr decrements a metric by an amount.

func (*HTTPStat) Gauge 

func (h *HTTPStat) Gauge(value int64) error

Gauge sets a gauge metric.

func (*HTTPStat) Incr 

func (h *HTTPStat) Incr(count int64) error

Incr increments a metric by an amount.

func (*HTTPStat) Timing 

func (h *HTTPStat) Timing(delta int64) error

Timing sets a timing metric.

type PromGauge 

type PromGauge struct {
	// contains filtered or unexported fields
}

PromGauge is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*PromGauge) Decr 

func (p *PromGauge) Decr(count int64) error

Decr decrements a metric by an amount.

func (*PromGauge) Gauge 

func (p *PromGauge) Gauge(value int64) error

Gauge sets a gauge metric.

func (*PromGauge) Incr 

func (p *PromGauge) Incr(count int64) error

Incr increments a metric by an amount.

type PromTiming 

type PromTiming struct {
	// contains filtered or unexported fields
}

PromTiming is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*PromTiming) Timing 

func (p *PromTiming) Timing(val int64) error

Timing sets a timing metric.

type Prometheus 

type Prometheus struct {
	sync.Mutex
	// contains filtered or unexported fields
}

Prometheus is a stats object with capability to hold internal stats as a JSON endpoint.

func (*Prometheus) Close 

func (p *Prometheus) Close() error

Close stops the Prometheus object from aggregating metrics and cleans up resources.

func (*Prometheus) Decr 

func (p *Prometheus) Decr(stat string, value int64) error

Decr decrements a stat by a value.

func (*Prometheus) Gauge 

func (p *Prometheus) Gauge(stat string, value int64) error

Gauge sets a stat as a gauge value.

func (*Prometheus) GetCounter 

func (p *Prometheus) GetCounter(path ...string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Prometheus) GetGauge 

func (p *Prometheus) GetGauge(path ...string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Prometheus) GetTimer 

func (p *Prometheus) GetTimer(path ...string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Prometheus) HandlerFunc 

func (p *Prometheus) HandlerFunc() http.HandlerFunc

HandlerFunc returns an http.HandlerFunc for scraping metrics.

func (*Prometheus) Incr 

func (p *Prometheus) Incr(stat string, value int64) error

Incr increments a stat by a value.

func (*Prometheus) Timing 

func (p *Prometheus) Timing(stat string, delta int64) error

Timing sets a stat representing a duration.

type PrometheusConfig 

type PrometheusConfig struct {
}

PrometheusConfig is config for the Prometheus metrics type.

func NewPrometheusConfig 

func NewPrometheusConfig() PrometheusConfig

NewPrometheusConfig creates an PrometheusConfig struct with default values.

type StatCounter 

type StatCounter interface {
	// Incr increments a metric by an amount.
	Incr(count int64) error

	// Decr decrements a metric by an amount.
	Decr(count int64) error
}

StatCounter is a representation of a single counter metric stat. Interactions with this stat are thread safe.

type StatGauge 

type StatGauge interface {
	// Gauge sets a gauge metric.
	Gauge(value int64) error
}

StatGauge is a representation of a single gauge metric stat. Interactions with this stat are thread safe.

type StatTimer 

type StatTimer interface {
	// Timing sets a timing metric.
	Timing(delta int64) error
}

StatTimer is a representation of a single timer metric stat. Interactions with this stat are thread safe.

type Statsd 

type Statsd struct {
	// contains filtered or unexported fields
}

Statsd is a stats object with capability to hold internal stats as a JSON endpoint.

func (*Statsd) Close 

func (h *Statsd) Close() error

Close stops the Statsd object from aggregating metrics and cleans up resources.

func (*Statsd) Decr 

func (h *Statsd) Decr(stat string, value int64) error

Decr decrements a stat by a value.

func (*Statsd) Gauge 

func (h *Statsd) Gauge(stat string, value int64) error

Gauge sets a stat as a gauge value.

func (*Statsd) GetCounter 

func (h *Statsd) GetCounter(path ...string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Statsd) GetGauge 

func (h *Statsd) GetGauge(path ...string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Statsd) GetTimer 

func (h *Statsd) GetTimer(path ...string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Statsd) Incr 

func (h *Statsd) Incr(stat string, value int64) error

Incr increments a stat by a value.

func (*Statsd) Timing 

func (h *Statsd) Timing(stat string, delta int64) error

Timing sets a stat representing a duration.

type StatsdConfig 

type StatsdConfig struct {
	Address       string `json:"address" yaml:"address"`
	FlushPeriod   string `json:"flush_period" yaml:"flush_period"`
	MaxPacketSize int    `json:"max_packet_size" yaml:"max_packet_size"`
	Network       string `json:"network" yaml:"network"`
}

StatsdConfig is config for the Statsd metrics type.

func NewStatsdConfig 

func NewStatsdConfig() StatsdConfig

NewStatsdConfig creates an StatsdConfig struct with default values.

type StatsdStat 

type StatsdStat struct {
	// contains filtered or unexported fields
}

StatsdStat is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*StatsdStat) Decr 

func (s *StatsdStat) Decr(count int64) error

Decr decrements a metric by an amount.

func (*StatsdStat) Gauge 

func (s *StatsdStat) Gauge(value int64) error

Gauge sets a gauge metric.

func (*StatsdStat) Incr 

func (s *StatsdStat) Incr(count int64) error

Incr increments a metric by an amount.

func (*StatsdStat) Timing 

func (s *StatsdStat) Timing(delta int64) error

Timing sets a timing metric.

type Type 

type Type interface {
	// GetCounter returns an editable counter stat for a given path.
	GetCounter(path ...string) StatCounter

	// GetTimer returns an editable timer stat for a given path.
	GetTimer(path ...string) StatTimer

	// GetGauge returns an editable gauge stat for a given path.
	GetGauge(path ...string) StatGauge

	// Incr increments a metric by an amount.
	Incr(path string, count int64) error

	// Decr decrements a metric by an amount.
	Decr(path string, count int64) error

	// Timing sets a timing metric.
	Timing(path string, delta int64) error

	// Gauge sets a gauge metric.
	Gauge(path string, value int64) error

	// Close stops aggregating stats and clean up resources.
	Close() error
}

Type is an interface for metrics aggregation.

func Namespaced 

func Namespaced(t Type, ns string) Type

Namespaced embeds an existing metrics aggregator under a new namespace. The prefix of the embedded aggregator is still the ultimate prefix of metrics.

func New 

func New(conf Config) (Type, error)

New creates a metric output type based on a configuration.

func NewHTTP 

func NewHTTP(config Config) (Type, error)

NewHTTP creates and returns a new HTTP object.

func NewPrometheus 

func NewPrometheus(config Config) (Type, error)

NewPrometheus creates and returns a new Prometheus object.

func NewStatsd 

func NewStatsd(config Config) (Type, error)

NewStatsd creates and returns a new Statsd object.

type WithHandlerFunc 

type WithHandlerFunc interface {
	HandlerFunc() http.HandlerFunc
}

WithHandlerFunc is an interface for metrics types that can expose their metrics through an HTTP HandlerFunc endpoint. If a Type can be cast into WithHandlerFunc then you should register its endpoint to the an HTTP server.

Source Files

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