package pull

import "go.opentelemetry.io/otel/sdk/metric/controller/pull"

Index ¶

• Constants
• type Config
• type Controller
• func New(checkpointer export.Checkpointer, options ...Option) *Controller
• func (c *Controller) Collect(ctx context.Context) error
• func (c *Controller) ForEach(ks export.ExportKindSelector, f func(export.Record) error) error
• func (c *Controller) MeterProvider() metric.MeterProvider
• func (c *Controller) SetClock(clock controllerTime.Clock)
• type Option
• func WithCachePeriod(cachePeriod time.Duration) Option
• func WithResource(r *resource.Resource) Option

Constants ¶

const DefaultCachePeriod time.Duration = 10 * time.Second

DefaultCachePeriod determines how long a recently-computed result will be returned without gathering metric data again.

Types ¶

type Config ¶

type Config struct {

	// Resource is the OpenTelemetry resource associated with all Meters
	// created by the Controller.
	Resource *resource.Resource

	// CachePeriod is the period which a recently-computed result
	// will be returned without gathering metric data again.
	//
	// If the period is zero, caching of the result is disabled.
	// The default value is 10 seconds.
	CachePeriod time.Duration
}

Config contains configuration for a pull Controller.

type Controller ¶

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

Controller manages access to a *sdk.Accumulator and *basic.Processor. Use MeterProvider() for obtaining Meters. Use Foreach() for accessing current records.

func New ¶

func New(checkpointer export.Checkpointer, options ...Option) *Controller

New returns a *Controller configured with an export.Checkpointer.

Pull controllers are typically used in an environment where there are multiple readers. It is common, therefore, when configuring a basic Processor for use with this controller, to use a CumulativeExport strategy and the basic.WithMemory(true) option, which ensures that every CheckpointSet includes full state.

func (*Controller) Collect ¶

func (c *Controller) Collect(ctx context.Context) error

Collect requests a collection. The collection will be skipped if the last collection is aged less than the CachePeriod.

func (*Controller) ForEach ¶

func (c *Controller) ForEach(ks export.ExportKindSelector, f func(export.Record) error) error

Foreach gives the caller read-locked access to the current export.CheckpointSet.

func (*Controller) MeterProvider ¶

func (c *Controller) MeterProvider() metric.MeterProvider

MeterProvider returns a MeterProvider for the implementation managed by this controller.

func (*Controller) SetClock ¶

func (c *Controller) SetClock(clock controllerTime.Clock)

SetClock sets the clock used for caching. For testing purposes.

type Option ¶

type Option interface {
	// Apply sets the Option value of a Config.
	Apply(*Config)
}

Option is the interface that applies the value to a configuration option.

func WithCachePeriod ¶

func WithCachePeriod(cachePeriod time.Duration) Option

WithCachePeriod sets the CachePeriod configuration option of a Config.

func WithResource ¶

func WithResource(r *resource.Resource) Option

WithResource sets the Resource configuration option of a Config.

Source Files ¶

config.go pull.go