metrics

package
v3.15.4 Latest Latest
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 Go to latest Published: May 30, 2020 License: MIT Imports: 29 Imported by: 0

Documentation

Overview

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

Index

Constants

View Source 
const (
	TypeBlackList  = "blacklist"
	TypeCloudWatch = "cloudwatch"
	TypeHTTPServer = "http_server"
	TypePrometheus = "prometheus"
	TypeRename     = "rename"
	TypeStatsd     = "statsd"
	TypeStdout     = "stdout"
	TypeWhiteList  = "whitelist"
)

String constants representing each metric type.

View Source 
const (
	TagFormatNone     = "none"
	TagFormatDatadog  = "datadog"
	TagFormatInfluxDB = "influxdb"
	TagFormatLegacy   = "legacy"
)

Tag formats supported by the statsd metric type.

Variables

View Source 
var Constructors = map[string]TypeSpec{}

Constructors is a map of all metrics types with their specs.

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 OptSetLogger 

func OptSetLogger(log log.Modular) func(Type)

OptSetLogger sets the logging output to be used by the metrics clients.

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 Blacklist 

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

Blacklist is a statistics object that wraps a separate statistics object and only permits statistics that pass through the Blacklist to be recorded.

func (*Blacklist) Close 

func (h *Blacklist) Close() error

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

func (*Blacklist) GetCounter 

func (h *Blacklist) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Blacklist) GetCounterVec 

func (h *Blacklist) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*Blacklist) GetGauge 

func (h *Blacklist) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Blacklist) GetGaugeVec 

func (h *Blacklist) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Blacklist) GetTimer 

func (h *Blacklist) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Blacklist) GetTimerVec 

func (h *Blacklist) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*Blacklist) HandlerFunc 

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

HandlerFunc returns an http.HandlerFunc for accessing metrics for appropriate child types

func (*Blacklist) SetLogger 

func (h *Blacklist) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type BlacklistConfig 

type BlacklistConfig struct {
	Paths    []string `json:"paths" yaml:"paths"`
	Patterns []string `json:"patterns" yaml:"patterns"`
	Child    *Config  `json:"child" yaml:"child"`
}

BlacklistConfig allows for the placement of filtering rules to only allow metrics that are not matched to be displayed or retrieved. It has a set of prefixes (direct string comparison) that are checked as well as a set of regular expressions for more precise control over metrics. It also has a metrics configuration that is wrapped by the Blacklist.

func NewBlacklistConfig 

func NewBlacklistConfig() BlacklistConfig

NewBlacklistConfig returns the default configuration for a Blacklist

func (BlacklistConfig) MarshalJSON 

func (w BlacklistConfig) MarshalJSON() ([]byte, error)

MarshalJSON prints an empty object instead of nil.

func (BlacklistConfig) MarshalYAML 

func (w BlacklistConfig) MarshalYAML() (interface{}, error)

MarshalYAML prints an empty object instead of nil.

type CloudWatch 

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

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

func (*CloudWatch) Close 

func (c *CloudWatch) Close() error

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

func (*CloudWatch) GetCounter 

func (c *CloudWatch) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*CloudWatch) GetCounterVec 

func (c *CloudWatch) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels

func (*CloudWatch) GetGauge 

func (c *CloudWatch) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*CloudWatch) GetGaugeVec 

func (c *CloudWatch) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels

func (*CloudWatch) GetTimer 

func (c *CloudWatch) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*CloudWatch) GetTimerVec 

func (c *CloudWatch) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels

func (*CloudWatch) SetLogger 

func (c *CloudWatch) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type CloudWatchConfig 

type CloudWatchConfig struct {
	session.Config `json:",inline" yaml:",inline"`
	Namespace      string `json:"namespace" yaml:"namespace"`
	FlushPeriod    string `json:"flush_period" yaml:"flush_period"`
}

CloudWatchConfig contains config fields for the CloudWatch metrics type.

func NewCloudWatchConfig 

func NewCloudWatchConfig() CloudWatchConfig

NewCloudWatchConfig creates an CloudWatchConfig struct with default values.

type Config 

type Config struct {
	Type       string           `json:"type" yaml:"type"`
	Blacklist  BlacklistConfig  `json:"blacklist" yaml:"blacklist"`
	CloudWatch CloudWatchConfig `json:"cloudwatch" yaml:"cloudwatch"`
	HTTP       HTTPConfig       `json:"http_server" yaml:"http_server"`
	Prometheus PrometheusConfig `json:"prometheus" yaml:"prometheus"`
	Rename     RenameConfig     `json:"rename" yaml:"rename"`
	Statsd     StatsdConfig     `json:"statsd" yaml:"statsd"`
	Stdout     StdoutConfig     `json:"stdout" yaml:"stdout"`
	Whitelist  WhitelistConfig  `json:"whitelist" yaml:"whitelist"`
}

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.

func (*Config) UnmarshalJSON 

func (c *Config) UnmarshalJSON(bytes []byte) error

UnmarshalJSON ensures that when parsing configs that are in a map or slice the default values are still applied.

func (*Config) UnmarshalYAML 

func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML ensures that when parsing configs that are in a map or slice the default values are still applied.

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) Incr 

func (d DudStat) Incr(count int64) error

Incr does nothing.

func (DudStat) Set 

func (d DudStat) Set(value int64) error

Set does nothing.

func (DudStat) Timing 

func (d DudStat) Timing(delta int64) error

Timing does nothing.

type DudType 

type DudType struct {
	ID int
}

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

func Noop 

func Noop() DudType

Noop returns a DudType for discarding metrics.

func (DudType) Close 

func (d DudType) Close() error

Close does nothing.

func (DudType) GetCounter 

func (d DudType) GetCounter(path string) StatCounter

GetCounter returns a DudStat.

func (DudType) GetCounterVec 

func (d DudType) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a DudStat.

func (DudType) GetGauge 

func (d DudType) GetGauge(path string) StatGauge

GetGauge returns a DudStat.

func (DudType) GetGaugeVec 

func (d DudType) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a DudStat.

func (DudType) GetTimer 

func (d DudType) GetTimer(path string) StatTimer

GetTimer returns a DudStat.

func (DudType) GetTimerVec 

func (d DudType) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a DudStat.

func (DudType) SetLogger 

func (d DudType) SetLogger(log log.Modular)

SetLogger does nothing.

type Flat 

type Flat interface {
	// Flat is an interface for setting metrics via flat paths.
	// 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 cleans up resources.
	Close() error
}

Flat is an interface for setting metrics via flat paths.

type HTTP 

type HTTP struct {
	// 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) GetCounter 

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

GetCounter returns a stat counter object for a path.

func (*HTTP) GetCounterVec 

func (h *HTTP) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*HTTP) GetGauge 

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

GetGauge returns a stat gauge object for a path.

func (*HTTP) GetGaugeVec 

func (h *HTTP) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*HTTP) GetTimer 

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

GetTimer returns a stat timer object for a path.

func (*HTTP) GetTimerVec 

func (h *HTTP) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*HTTP) HandlerFunc 

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

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

func (*HTTP) SetLogger 

func (h *HTTP) SetLogger(log log.Modular)

SetLogger does nothing.

type HTTPConfig 

type HTTPConfig struct {
	Prefix string `json:"prefix" yaml:"prefix"`
}

HTTPConfig contains configuration parameters for the HTTP metrics aggregator.

func NewHTTPConfig 

func NewHTTPConfig() HTTPConfig

NewHTTPConfig returns a new HTTPConfig with default values.

type Local 

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

Local is a metrics aggregator that stores metrics locally.

func NewLocal 

func NewLocal() *Local

NewLocal creates and returns a new Local aggregator.

func (*Local) Close 

func (l *Local) Close() error

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

func (*Local) FlushCounters 

func (l *Local) FlushCounters() map[string]int64

FlushCounters returns a map of the current state of the metrics paths to counters and then resets the counters to 0

func (*Local) FlushTimings 

func (l *Local) FlushTimings() map[string]int64

FlushTimings returns a map of the current state of the metrics paths to counters and then resets the counters to 0

func (*Local) GetCounter 

func (l *Local) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Local) GetCounterVec 

func (l *Local) GetCounterVec(path string, k []string) StatCounterVec

GetCounterVec returns a stat counter object for a path and records the labels and values.

func (*Local) GetCounters 

func (l *Local) GetCounters() map[string]int64

GetCounters returns a map of metric paths to counters.

func (*Local) GetCountersWithLabels 

func (l *Local) GetCountersWithLabels() map[string]LocalStat

GetCountersWithLabels returns a map of metric paths to counters including labels and values.

func (*Local) GetGauge 

func (l *Local) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Local) GetGaugeVec 

func (l *Local) GetGaugeVec(path string, k []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Local) GetTimer 

func (l *Local) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Local) GetTimerVec 

func (l *Local) GetTimerVec(path string, k []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels and values.

func (*Local) GetTimings 

func (l *Local) GetTimings() map[string]int64

GetTimings returns a map of metric paths to timers.

func (*Local) GetTimingsWithLabels 

func (l *Local) GetTimingsWithLabels() map[string]LocalStat

GetTimingsWithLabels returns a map of metric paths to timers, including labels and values.

func (*Local) SetLogger 

func (l *Local) SetLogger(logger log.Modular)

SetLogger does nothing.

type LocalStat 

type LocalStat struct {
	Value *int64
	// contains filtered or unexported fields
}

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

func (*LocalStat) Decr 

func (l *LocalStat) Decr(count int64) error

Decr decrements a metric by an amount.

func (*LocalStat) HasLabelWithValue 

func (l *LocalStat) HasLabelWithValue(k, v string) bool

HasLabelWithValue takes a label/value pair and returns true if that combination has been recorded, or false otherwise.

This is mostly useful in tests for custom processors.

func (*LocalStat) Incr 

func (l *LocalStat) Incr(count int64) error

Incr increments a metric by an amount.

func (*LocalStat) Set 

func (l *LocalStat) Set(value int64) error

Set sets a gauge metric.

func (*LocalStat) Timing 

func (l *LocalStat) Timing(delta int64) error

Timing sets a timing metric.

type PromCounter 

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

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

func (*PromCounter) Incr 

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

Incr increments a metric by an amount.

type PromCounterVec 

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

PromCounterVec creates StatCounters with dynamic labels.

func (*PromCounterVec) With 

func (p *PromCounterVec) With(labelValues ...string) StatCounter

With returns a StatCounter with a set of label values.

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) Incr 

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

Incr increments a metric by an amount.

func (*PromGauge) Set 

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

Set sets a gauge metric.

type PromGaugeVec 

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

PromGaugeVec creates StatGauges with dynamic labels.

func (*PromGaugeVec) With 

func (p *PromGaugeVec) With(labelValues ...string) StatGauge

With returns a StatGauge with a set of label values.

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 PromTimingVec 

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

PromTimingVec creates StatTimers with dynamic labels.

func (*PromTimingVec) With 

func (p *PromTimingVec) With(labelValues ...string) StatTimer

With returns a StatTimer with a set of label values.

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) GetCounter 

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

GetCounter returns a stat counter object for a path.

func (*Prometheus) GetCounterVec 

func (p *Prometheus) GetCounterVec(path string, labelNames []string) StatCounterVec

GetCounterVec returns an editable counter stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) GetGauge 

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

GetGauge returns a stat gauge object for a path.

func (*Prometheus) GetGaugeVec 

func (p *Prometheus) GetGaugeVec(path string, labelNames []string) StatGaugeVec

GetGaugeVec returns an editable gauge stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) GetTimer 

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

GetTimer returns a stat timer object for a path.

func (*Prometheus) GetTimerVec 

func (p *Prometheus) GetTimerVec(path string, labelNames []string) StatTimerVec

GetTimerVec returns an editable timer stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) HandlerFunc 

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

HandlerFunc returns an http.HandlerFunc for scraping metrics.

func (*Prometheus) SetLogger 

func (p *Prometheus) SetLogger(log log.Modular)

SetLogger does nothing.

type PrometheusConfig 

type PrometheusConfig struct {
	Prefix       string `json:"prefix" yaml:"prefix"`
	PushURL      string `json:"push_url" yaml:"push_url"`
	PushInterval string `json:"push_interval" yaml:"push_interval"`
	PushJobName  string `json:"push_job_name" yaml:"push_job_name"`
}

PrometheusConfig is config for the Prometheus metrics type.

func NewPrometheusConfig 

func NewPrometheusConfig() PrometheusConfig

NewPrometheusConfig creates an PrometheusConfig struct with default values.

type Rename 

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

Rename is a statistics object that wraps a separate statistics object and only permits statistics that pass through the whitelist to be recorded.

func (*Rename) Close 

func (r *Rename) Close() error

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

func (*Rename) GetCounter 

func (r *Rename) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Rename) GetCounterVec 

func (r *Rename) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels and values.

func (*Rename) GetGauge 

func (r *Rename) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Rename) GetGaugeVec 

func (r *Rename) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Rename) GetTimer 

func (r *Rename) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Rename) GetTimerVec 

func (r *Rename) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels and values.

func (*Rename) HandlerFunc 

func (r *Rename) HandlerFunc() http.HandlerFunc

HandlerFunc returns an http.HandlerFunc for accessing metrics for appropriate child types

func (*Rename) SetLogger 

func (r *Rename) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type RenameByRegexpConfig 

type RenameByRegexpConfig struct {
	Pattern string            `json:"pattern" yaml:"pattern"`
	Value   string            `json:"value" yaml:"value"`
	Labels  map[string]string `json:"to_label" yaml:"to_label"`
}

RenameByRegexpConfig contains config fields for a rename by regular expression pattern.

type RenameConfig 

type RenameConfig struct {
	ByRegexp []RenameByRegexpConfig `json:"by_regexp" yaml:"by_regexp"`
	Child    *Config                `json:"child" yaml:"child"`
}

RenameConfig contains config fields for the Rename metric type.

func NewRenameConfig 

func NewRenameConfig() RenameConfig

NewRenameConfig returns a RenameConfig with default values.

func (RenameConfig) MarshalJSON 

func (w RenameConfig) MarshalJSON() ([]byte, error)

MarshalJSON prints an empty object instead of nil.

func (RenameConfig) MarshalYAML 

func (w RenameConfig) MarshalYAML() (interface{}, error)

MarshalYAML prints an empty object instead of nil.

type StatCounter 

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

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

type StatCounterVec 

type StatCounterVec interface {
	// With returns a StatCounter with a set of label values.
	With(labelValues ...string) StatCounter
}

StatCounterVec creates StatCounters with dynamic labels.

type StatGauge 

type StatGauge interface {
	// Set sets the value of a gauge metric.
	Set(value int64) error

	// Incr increments a gauge by an amount.
	Incr(count int64) error

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

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

type StatGaugeVec 

type StatGaugeVec interface {
	// With returns a StatGauge with a set of label values.
	With(labelValues ...string) StatGauge
}

StatGaugeVec creates StatGauges with dynamic labels.

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 StatTimerVec 

type StatTimerVec interface {
	// With returns a StatTimer with a set of label values.
	With(labelValues ...string) StatTimer
}

StatTimerVec creates StatTimers with dynamic labels.

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) GetCounter 

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

GetCounter returns a stat counter object for a path.

func (*Statsd) GetCounterVec 

func (h *Statsd) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels

func (*Statsd) GetGauge 

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

GetGauge returns a stat gauge object for a path.

func (*Statsd) GetGaugeVec 

func (h *Statsd) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels

func (*Statsd) GetTimer 

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

GetTimer returns a stat timer object for a path.

func (*Statsd) GetTimerVec 

func (h *Statsd) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels

func (*Statsd) SetLogger 

func (h *Statsd) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type StatsdConfig 

type StatsdConfig struct {
	Prefix      string `json:"prefix" yaml:"prefix"`
	Address     string `json:"address" yaml:"address"`
	FlushPeriod string `json:"flush_period" yaml:"flush_period"`
	Network     string `json:"network" yaml:"network"`
	TagFormat   string `json:"tag_format" yaml:"tag_format"`
}

StatsdConfig is config for the Statsd metrics type.

func NewStatsdConfig 

func NewStatsdConfig() StatsdConfig

NewStatsdConfig creates an StatsdConfig struct with default values.

type StatsdLegacy 

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

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

func (*StatsdLegacy) Close 

func (h *StatsdLegacy) Close() error

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

func (*StatsdLegacy) GetCounter 

func (h *StatsdLegacy) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*StatsdLegacy) GetCounterVec 

func (h *StatsdLegacy) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*StatsdLegacy) GetGauge 

func (h *StatsdLegacy) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*StatsdLegacy) GetGaugeVec 

func (h *StatsdLegacy) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*StatsdLegacy) GetTimer 

func (h *StatsdLegacy) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*StatsdLegacy) GetTimerVec 

func (h *StatsdLegacy) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*StatsdLegacy) SetLogger 

func (h *StatsdLegacy) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type StatsdLegacyStat 

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

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

func (*StatsdLegacyStat) Decr 

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

Decr decrements a metric by an amount.

func (*StatsdLegacyStat) Incr 

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

Incr increments a metric by an amount.

func (*StatsdLegacyStat) Set 

func (s *StatsdLegacyStat) Set(value int64) error

Set sets a gauge metric.

func (*StatsdLegacyStat) Timing 

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

Timing sets a timing metric.

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) Incr 

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

Incr increments a metric by an amount.

func (*StatsdStat) Set 

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

Set sets a gauge metric.

func (*StatsdStat) Timing 

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

Timing sets a timing metric.

type Stdout 

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

Stdout is an object with capability to hold internal stats and emit them as individual JSON objects via stdout.

func (*Stdout) Close 

func (s *Stdout) Close() error

Close stops the Stdout object from aggregating metrics and does a publish (write to stdout) of metrics.

func (*Stdout) GetCounter 

func (s *Stdout) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Stdout) GetCounterVec 

func (s *Stdout) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*Stdout) GetGauge 

func (s *Stdout) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Stdout) GetGaugeVec 

func (s *Stdout) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Stdout) GetTimer 

func (s *Stdout) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Stdout) GetTimerVec 

func (s *Stdout) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*Stdout) SetLogger 

func (s *Stdout) SetLogger(log log.Modular)

SetLogger does nothing.

type StdoutConfig 

type StdoutConfig struct {
	PushInterval string                 `json:"push_interval" yaml:"push_interval"`
	StaticFields map[string]interface{} `json:"static_fields" yaml:"static_fields"`
	FlushMetrics bool                   `json:"flush_metrics" yaml:"flush_metrics"`
}

StdoutConfig contains configuration parameters for the Stdout metrics aggregator.

func NewStdoutConfig 

func NewStdoutConfig() StdoutConfig

NewStdoutConfig returns a new StdoutConfig with default values.

type Type 

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

	// GetCounterVec returns an editable counter stat for a given path with
	// labels, these labels must be consistent with any other metrics registered
	// on the same path.
	GetCounterVec(path string, labelNames []string) StatCounterVec

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

	// GetTimerVec returns an editable timer stat for a given path with labels,
	// these labels must be consistent with any other metrics registered on the
	// same path.
	GetTimerVec(path string, labelNames []string) StatTimerVec

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

	// GetGaugeVec returns an editable gauge stat for a given path with labels,
	// these labels must be consistent with any other metrics registered on the
	// same path.
	GetGaugeVec(path string, labelNames []string) StatGaugeVec

	// SetLogger sets the logging mechanism of the metrics type.
	SetLogger(log log.Modular)

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

Type is an interface for metrics aggregation.

func Combine 

func Combine(t1, t2 Type) Type

Combine returns a Type implementation that feeds metrics into two underlying Type implementations.

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, opts ...func(Type)) (Type, error)

New creates a metric output type based on a configuration.

func NewBlacklist 

func NewBlacklist(config Config, opts ...func(Type)) (Type, error)

NewBlacklist creates and returns a new Blacklist object

func NewCloudWatch 

func NewCloudWatch(config Config, opts ...func(Type)) (Type, error)

NewCloudWatch creates and returns a new CloudWatch object.

func NewHTTP 

func NewHTTP(config Config, opts ...func(Type)) (Type, error)

NewHTTP creates and returns a new HTTP object.

func NewPrometheus 

func NewPrometheus(config Config, opts ...func(Type)) (Type, error)

NewPrometheus creates and returns a new Prometheus object.

func NewRename 

func NewRename(config Config, opts ...func(Type)) (Type, error)

NewRename creates and returns a new Rename object

func NewStatsd 

func NewStatsd(config Config, opts ...func(Type)) (Type, error)

NewStatsd creates and returns a new Statsd object.

func NewStatsdLegacy 

func NewStatsdLegacy(config Config, opts ...func(Type)) (Type, error)

NewStatsdLegacy creates and returns a new StatsdLegacy object.

func NewStdout 

func NewStdout(config Config, opts ...func(Type)) (Type, error)

NewStdout creates and returns a new Stdout metric object.

func NewWhitelist 

func NewWhitelist(config Config, opts ...func(Type)) (Type, error)

NewWhitelist creates and returns a new Whitelist object

func WrapFlat 

func WrapFlat(f Flat) Type

WrapFlat creates a Type around a Flat implementation.

type TypeSpec 

type TypeSpec struct {
	Summary     string
	Description string
	Footnotes   string
	FieldSpecs  docs.FieldSpecs
	// contains filtered or unexported fields
}

TypeSpec is a constructor and a usage description for each metric output type.

type Whitelist 

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

Whitelist is a statistics object that wraps a separate statistics object and only permits statistics that pass through the whitelist to be recorded.

func (*Whitelist) Close 

func (h *Whitelist) Close() error

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

func (*Whitelist) GetCounter 

func (h *Whitelist) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Whitelist) GetCounterVec 

func (h *Whitelist) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*Whitelist) GetGauge 

func (h *Whitelist) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Whitelist) GetGaugeVec 

func (h *Whitelist) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Whitelist) GetTimer 

func (h *Whitelist) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Whitelist) GetTimerVec 

func (h *Whitelist) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*Whitelist) HandlerFunc 

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

HandlerFunc returns an http.HandlerFunc for accessing metrics for appropriate child types

func (*Whitelist) SetLogger 

func (h *Whitelist) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type WhitelistConfig 

type WhitelistConfig struct {
	Paths    []string `json:"paths" yaml:"paths"`
	Patterns []string `json:"patterns" yaml:"patterns"`
	Child    *Config  `json:"child" yaml:"child"`
}

WhitelistConfig allows for the placement of filtering rules to only allow select metrics to be displayed or retrieved. It consists of a set of prefixes (direct string comparison) that are checked, and a standard metrics configuration that is wrapped by the whitelist.

func NewWhitelistConfig 

func NewWhitelistConfig() WhitelistConfig

NewWhitelistConfig returns the default configuration for a whitelist

func (WhitelistConfig) MarshalJSON 

func (w WhitelistConfig) MarshalJSON() ([]byte, error)

MarshalJSON prints an empty object instead of nil.

func (WhitelistConfig) MarshalYAML 

func (w WhitelistConfig) MarshalYAML() (interface{}, error)

MarshalYAML prints an empty object instead of nil.

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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