Documentation
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Overview ¶
Package ewmaparams is the one reading of WIN_EWMA's params, shared by the window factory (internal/processing/window) and predict (internal/descriptor) so both refuse the same request with the same message. It decides what a request MEANS and never smooths a value.
The smoothing factor is given as exactly one of `alpha` or `decay` (alpha = 1 − decay). A decay is converted through the EXACT decimal of its JSON literal: `decay: 0.7` yields the double nearest 3/10, which is the double of the literal `alpha: 0.3` — never the float64 subtraction 1.0 − 0.7 (0.30000000000000004).
Leaf: stdlib + the public errors package.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Params ¶
type Params struct {
Alpha *float64 `json:"alpha"`
Decay json.RawMessage `json:"decay"`
}
Params is the typed wire shape of WIN_EWMA's params. Decay stays a raw literal so its exact decimal value survives the decode.
type Refusal ¶
Refusal is one violated rule: Message is the operator-neutral sentence (callers prefix their own context) and Details the offending values.
func Resolve ¶
func Resolve(raw json.RawMessage) (float64, *Refusal)
Resolve reads raw params and returns the effective alpha, or the first rule the params break.
func (*Refusal) Coded ¶
func (r *Refusal) Coded() *errors.CodedError
Coded returns the refusal as a PULSE_WINDOW_INVALID error with the runtime prefix — the factory's refusal, predict's code (the window family's one code, internal/windowparams).
Source Files