108 lines
4.2 KiB
Go
108 lines
4.2 KiB
Go
// Copyright 2020 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package client
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common/mclock"
|
|
"github.com/ethereum/go-ethereum/les/utils"
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
|
)
|
|
|
|
// PrivateClientAPI implements the vflux client side API
|
|
type PrivateClientAPI struct {
|
|
vt *ValueTracker
|
|
}
|
|
|
|
// NewPrivateClientAPI creates a PrivateClientAPI
|
|
func NewPrivateClientAPI(vt *ValueTracker) *PrivateClientAPI {
|
|
return &PrivateClientAPI{vt}
|
|
}
|
|
|
|
// parseNodeStr converts either an enode address or a plain hex node id to enode.ID
|
|
func parseNodeStr(nodeStr string) (enode.ID, error) {
|
|
if id, err := enode.ParseID(nodeStr); err == nil {
|
|
return id, nil
|
|
}
|
|
if node, err := enode.Parse(enode.ValidSchemes, nodeStr); err == nil {
|
|
return node.ID(), nil
|
|
} else {
|
|
return enode.ID{}, err
|
|
}
|
|
}
|
|
|
|
// RequestStats returns the current contents of the reference request basket, with
|
|
// request values meaning average per request rather than total.
|
|
func (api *PrivateClientAPI) RequestStats() []RequestStatsItem {
|
|
return api.vt.RequestStats()
|
|
}
|
|
|
|
// Distribution returns a distribution as a series of (X, Y) chart coordinates,
|
|
// where the X axis is the response time in seconds while the Y axis is the amount of
|
|
// service value received with a response time close to the X coordinate.
|
|
// The distribution is optionally normalized to a sum of 1.
|
|
// If nodeStr == "" then the global distribution is returned, otherwise the individual
|
|
// distribution of the specified server node.
|
|
func (api *PrivateClientAPI) Distribution(nodeStr string, normalized bool) (RtDistribution, error) {
|
|
var expFactor utils.ExpirationFactor
|
|
if !normalized {
|
|
expFactor = utils.ExpFactor(api.vt.StatsExpirer().LogOffset(mclock.Now()))
|
|
}
|
|
if nodeStr == "" {
|
|
return api.vt.RtStats().Distribution(normalized, expFactor), nil
|
|
}
|
|
if id, err := parseNodeStr(nodeStr); err == nil {
|
|
return api.vt.GetNode(id).RtStats().Distribution(normalized, expFactor), nil
|
|
} else {
|
|
return RtDistribution{}, err
|
|
}
|
|
}
|
|
|
|
// Timeout suggests a timeout value based on either the global distribution or the
|
|
// distribution of the specified node. The parameter is the desired rate of timeouts
|
|
// assuming a similar distribution in the future.
|
|
// Note that the actual timeout should have a sensible minimum bound so that operating
|
|
// under ideal working conditions for a long time (for example, using a local server
|
|
// with very low response times) will not make it very hard for the system to accommodate
|
|
// longer response times in the future.
|
|
func (api *PrivateClientAPI) Timeout(nodeStr string, failRate float64) (float64, error) {
|
|
if nodeStr == "" {
|
|
return float64(api.vt.RtStats().Timeout(failRate)) / float64(time.Second), nil
|
|
}
|
|
if id, err := parseNodeStr(nodeStr); err == nil {
|
|
return float64(api.vt.GetNode(id).RtStats().Timeout(failRate)) / float64(time.Second), nil
|
|
} else {
|
|
return 0, err
|
|
}
|
|
}
|
|
|
|
// Value calculates the total service value provided either globally or by the specified
|
|
// server node, using a weight function based on the given timeout.
|
|
func (api *PrivateClientAPI) Value(nodeStr string, timeout float64) (float64, error) {
|
|
wt := TimeoutWeights(time.Duration(timeout * float64(time.Second)))
|
|
expFactor := utils.ExpFactor(api.vt.StatsExpirer().LogOffset(mclock.Now()))
|
|
if nodeStr == "" {
|
|
return api.vt.RtStats().Value(wt, expFactor), nil
|
|
}
|
|
if id, err := parseNodeStr(nodeStr); err == nil {
|
|
return api.vt.GetNode(id).RtStats().Value(wt, expFactor), nil
|
|
} else {
|
|
return 0, err
|
|
}
|
|
}
|