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[#488] storage/calculator: Make alpha dynamic

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Delete reading `alpha` from env var. Cover
retrieving `alpha` behind interface in
intermediate calculator. Add TODO to decide
if it is necessary to receive that param from
global config or not.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
This commit is contained in:
Pavel Karpy 2021-04-29 09:03:24 +03:00 • committed by Alex Vanin
parent ad4a55468e
commit 2c8c9f69c8
6 changed files with 34 additions and 14 deletions
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12
pkg/services/reputation/eigentrust/calculator/calculator.go
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@ -18,7 +18,7 @@ type Prm struct {
// http://ilpubs.stanford.edu:8090/562/1/2002-56.pdf Ch.5.1.
//
// Must be in range (0, 1).
Alpha float64
AlphaProvider AlphaProvider
// Source of initial node trust values
//
@ -63,8 +63,8 @@ func panicOnPrmValue(n string, v interface{}) {
// initialization and is completely ready for work.
func New(prm Prm, opts ...Option) *Calculator {
switch {
case prm.Alpha <= 0 || prm.Alpha >= 1:
panicOnPrmValue("Alpha", prm.Alpha)
case prm.AlphaProvider == nil:
panicOnPrmValue("AlphaProvider", prm.AlphaProvider)
case prm.InitialTrustSource == nil:
panicOnPrmValue("InitialTrustSource", prm.InitialTrustSource)
case prm.DaughterTrustSource == nil:
@ -84,9 +84,7 @@ func New(prm Prm, opts ...Option) *Calculator {
}
return &Calculator{
alpha: reputation.TrustValueFromFloat64(prm.Alpha),
beta: reputation.TrustValueFromFloat64(1 - prm.Alpha),
prm: prm,
opts: o,
prm: prm,
opts: o,
}
}