minmaxsumcount

Documentation

Index

• type Aggregator
  • func New(desc *metric.Descriptor) *Aggregator
  • func (c *Aggregator) Checkpoint(ctx context.Context, desc *metric.Descriptor)
  • func (c *Aggregator) Count() (int64, error)
  • func (c *Aggregator) Max() (core.Number, error)
  • func (c *Aggregator) Merge(oa export.Aggregator, desc *metric.Descriptor) error
  • func (c *Aggregator) Min() (core.Number, error)
  • func (c *Aggregator) Sum() (core.Number, error)
  • func (c *Aggregator) Update(_ context.Context, number core.Number, desc *metric.Descriptor) error

Types

type Aggregator

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

Aggregator aggregates measure events, keeping only the max, sum, and count.

func New

func New(desc *metric.Descriptor) *Aggregator

New returns a new measure aggregator for computing min, max, sum, and count. It does not compute quantile information other than Max.

This aggregator uses the StateLocker pattern to guarantee the count, sum, min and max are consistent within a checkpoint

func (*Aggregator) Checkpoint

func (c *Aggregator) Checkpoint(ctx context.Context, desc *metric.Descriptor)

Checkpoint saves the current state and resets the current state to the empty set.

func (*Aggregator) Count

func (c *Aggregator) Count() (int64, error)

Count returns the number of values in the checkpoint.

func (*Aggregator) Max

func (c *Aggregator) Max() (core.Number, error)

Max returns the maximum value in the checkpoint. The error value aggregator.ErrNoData will be returned if there were no measurements recorded during the checkpoint.

func (*Aggregator) Merge

func (c *Aggregator) Merge(oa export.Aggregator, desc *metric.Descriptor) error

Merge combines two data sets into one.

func (*Aggregator) Min

func (c *Aggregator) Min() (core.Number, error)

Min returns the minimum value in the checkpoint. The error value aggregator.ErrNoData will be returned if there were no measurements recorded during the checkpoint.

func (*Aggregator) Sum

func (c *Aggregator) Sum() (core.Number, error)

Sum returns the sum of values in the checkpoint.

func (*Aggregator) Update

func (c *Aggregator) Update(_ context.Context, number core.Number, desc *metric.Descriptor) error

Update adds the recorded measurement to the current data set.