scraperhelper

Documentation

Overview

Package scraperhelper provides utilities for scrapers.

Index

• func NewScraperControllerReceiver(cfg *ScraperControllerSettings, set receiver.CreateSettings, ...) (component.Component, error)
• type ScrapeFunc
  • func (sf ScrapeFunc) Scrape(ctx context.Context) (pmetric.Metrics, error)
• type Scraper
  • func NewScraper(name string, scrape ScrapeFunc, options ...ScraperOption) (Scraper, error)
• type ScraperControllerOption
  • func AddScraper(scraper Scraper) ScraperControllerOption
  • func WithTickerChannel(tickerCh <-chan time.Time) ScraperControllerOption
• type ScraperControllerSettings
  • func NewDefaultScraperControllerSettings(component.Type) ScraperControllerSettings
• type ScraperOption
  • func WithShutdown(shutdown component.ShutdownFunc) ScraperOption
  • func WithStart(start component.StartFunc) ScraperOption

Functions

func NewScraperControllerReceiver

func NewScraperControllerReceiver(
	cfg *ScraperControllerSettings,
	set receiver.CreateSettings,
	nextConsumer consumer.Metrics,
	options ...ScraperControllerOption,
) (component.Component, error)

NewScraperControllerReceiver creates a Receiver with the configured options, that can control multiple scrapers.

Types

type ScrapeFunc

type ScrapeFunc func(context.Context) (pmetric.Metrics, error)

ScrapeFunc scrapes metrics.

func (ScrapeFunc) Scrape

func (sf ScrapeFunc) Scrape(ctx context.Context) (pmetric.Metrics, error)

type Scraper

type Scraper interface {
	component.Component

	// ID returns the scraper id.
	ID() component.ID
	Scrape(context.Context) (pmetric.Metrics, error)
}

Scraper is the base interface for scrapers.

func NewScraper

func NewScraper(name string, scrape ScrapeFunc, options ...ScraperOption) (Scraper, error)

NewScraper creates a Scraper that calls Scrape at the specified collection interval, reports observability information, and passes the scraped metrics to the next consumer.

type ScraperControllerOption

type ScraperControllerOption func(*controller)

ScraperControllerOption apply changes to internal options.

func AddScraper

func AddScraper(scraper Scraper) ScraperControllerOption

AddScraper configures the provided scrape function to be called with the specified options, and at the specified collection interval.

Observability information will be reported, and the scraped metrics will be passed to the next consumer.

func WithTickerChannel

func WithTickerChannel(tickerCh <-chan time.Time) ScraperControllerOption

WithTickerChannel allows you to override the scraper controllers ticker channel to specify when scrape is called. This is only expected to be used by tests.

type ScraperControllerSettings

type ScraperControllerSettings struct {
	CollectionInterval time.Duration `mapstructure:"collection_interval"`
}

ScraperControllerSettings defines common settings for a scraper controller configuration. Scraper controller receivers can embed this struct, instead of receiver.Settings, and extend it with more fields if needed.

func NewDefaultScraperControllerSettings

func NewDefaultScraperControllerSettings(component.Type) ScraperControllerSettings

NewDefaultScraperControllerSettings returns default scraper controller settings with a collection interval of one minute.

type ScraperOption

type ScraperOption func(*baseScraper)

ScraperOption apply changes to internal options.

func WithShutdown

func WithShutdown(shutdown component.ShutdownFunc) ScraperOption

WithShutdown sets the function that will be called on shutdown.

func WithStart

func WithStart(start component.StartFunc) ScraperOption

WithStart sets the function that will be called on startup.