mirror of https://github.com/status-im/consul.git
97 lines
2.8 KiB
Go
97 lines
2.8 KiB
Go
package metrics
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import (
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"os"
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"sync/atomic"
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"time"
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)
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// Config is used to configure metrics settings
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type Config struct {
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ServiceName string // Prefixed with keys to seperate services
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HostName string // Hostname to use. If not provided and EnableHostname, it will be os.Hostname
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EnableHostname bool // Enable prefixing gauge values with hostname
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EnableRuntimeMetrics bool // Enables profiling of runtime metrics (GC, Goroutines, Memory)
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EnableTypePrefix bool // Prefixes key with a type ("counter", "gauge", "timer")
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TimerGranularity time.Duration // Granularity of timers.
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ProfileInterval time.Duration // Interval to profile runtime metrics
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}
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// Metrics represents an instance of a metrics sink that can
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// be used to emit
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type Metrics struct {
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Config
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lastNumGC uint32
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sink MetricSink
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}
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// Shared global metrics instance
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var globalMetrics atomic.Value // *Metrics
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func init() {
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// Initialize to a blackhole sink to avoid errors
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globalMetrics.Store(&Metrics{sink: &BlackholeSink{}})
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}
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// DefaultConfig provides a sane default configuration
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func DefaultConfig(serviceName string) *Config {
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c := &Config{
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ServiceName: serviceName, // Use client provided service
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HostName: "",
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EnableHostname: true, // Enable hostname prefix
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EnableRuntimeMetrics: true, // Enable runtime profiling
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EnableTypePrefix: false, // Disable type prefix
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TimerGranularity: time.Millisecond, // Timers are in milliseconds
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ProfileInterval: time.Second, // Poll runtime every second
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}
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// Try to get the hostname
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name, _ := os.Hostname()
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c.HostName = name
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return c
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}
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// New is used to create a new instance of Metrics
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func New(conf *Config, sink MetricSink) (*Metrics, error) {
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met := &Metrics{}
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met.Config = *conf
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met.sink = sink
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// Start the runtime collector
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if conf.EnableRuntimeMetrics {
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go met.collectStats()
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}
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return met, nil
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}
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// NewGlobal is the same as New, but it assigns the metrics object to be
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// used globally as well as returning it.
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func NewGlobal(conf *Config, sink MetricSink) (*Metrics, error) {
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metrics, err := New(conf, sink)
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if err == nil {
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globalMetrics.Store(metrics)
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}
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return metrics, err
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}
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// Proxy all the methods to the globalMetrics instance
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func SetGauge(key []string, val float32) {
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globalMetrics.Load().(*Metrics).SetGauge(key, val)
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}
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func EmitKey(key []string, val float32) {
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globalMetrics.Load().(*Metrics).EmitKey(key, val)
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}
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func IncrCounter(key []string, val float32) {
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globalMetrics.Load().(*Metrics).IncrCounter(key, val)
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}
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func AddSample(key []string, val float32) {
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globalMetrics.Load().(*Metrics).AddSample(key, val)
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}
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func MeasureSince(key []string, start time.Time) {
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globalMetrics.Load().(*Metrics).MeasureSince(key, start)
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}
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