package metrics

import "github.com/open-policy-agent/opa/v1/metrics"

Package metrics contains helpers for performance metric management inside the policy engine.

Index

Constants 

const (
	BundleRequest       = "bundle_request"
	ServerHandler       = "server_handler"
	ServerQueryCacheHit = "server_query_cache_hit"
	SDKDecisionEval     = "sdk_decision_eval"
	RegoQueryCompile    = "rego_query_compile"
	RegoQueryEval       = "rego_query_eval"
	RegoQueryParse      = "rego_query_parse"
	RegoModuleParse     = "rego_module_parse"
	RegoDataParse       = "rego_data_parse"
	RegoModuleCompile   = "rego_module_compile"
	RegoPartialEval     = "rego_partial_eval"
	RegoInputParse      = "rego_input_parse"
	RegoLoadFiles       = "rego_load_files"
	RegoLoadBundles     = "rego_load_bundles"
	RegoExternalResolve = "rego_external_resolve"
)

Well-known metric names.

Functions

func Statistics 

func Statistics(num ...int64) any

Types

type Counter 

type Counter interface {
	Value() any
	Incr()
	Add(n uint64)
}

Counter defines the interface for a monotonic increasing counter.

type Histogram 

type Histogram interface {
	Value() any
	Update(int64)
}

Histogram defines the interface for a histogram with hardcoded percentiles.

type Info 

type Info struct {
	Name string `json:"name"` // name is a unique human-readable identifier for the provider.
}

Info contains attributes describing the underlying metrics provider.

type Metrics 

type Metrics interface {
	Info() Info
	Timer(name string) Timer
	Histogram(name string) Histogram
	Counter(name string) Counter
	All() map[string]any
	Clear()
	json.Marshaler
}

Metrics defines the interface for a collection of performance metrics in the policy engine.

func New 

func New() Metrics

New returns a new Metrics object.

func NoOp 

func NoOp() Metrics

NoOp returns a Metrics implementation that does nothing and costs nothing. Used when metrics are expected, but not of interest.

type Timer 

type Timer interface {
	Value() any
	Int64() int64
	// Start or resume a timer's time tracking.
	Start()
	// Stop a timer, and accumulate the delta (in nanoseconds) since it was last
	// started.
	Stop() int64
}

Timer defines the interface for a restartable timer that accumulates elapsed time.

type TimerMetrics 

type TimerMetrics interface {
	Timers() map[string]any
}

Source Files

metrics.go

Version
v1.6.0 (latest)
Published
Jun 30, 2025
Platform
linux/amd64
Imports
8 packages
Last checked
4 hours ago –

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