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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus 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 dexon-consensus 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 dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package core
import (
"time"
"github.com/dexon-foundation/dexon-consensus/core/utils"
)
// TickerType is the type of ticker.
type TickerType int
// TickerType enum.
const (
TickerBA TickerType = iota
TickerDKG
TickerCRS
)
// defaultTicker is a wrapper to implement ticker interface based on
// time.Ticker.
type defaultTicker struct {
ticker *time.Ticker
duration time.Duration
}
// newDefaultTicker constructs an defaultTicker instance by giving an interval.
func newDefaultTicker(lambda time.Duration) *defaultTicker {
return &defaultTicker{
ticker: time.NewTicker(lambda),
duration: lambda,
}
}
// Tick implements Tick method of ticker interface.
func (t *defaultTicker) Tick() <-chan time.Time {
return t.ticker.C
}
// Stop implements Stop method of ticker interface.
func (t *defaultTicker) Stop() {
t.ticker.Stop()
}
// Restart implements Stop method of ticker interface.
func (t *defaultTicker) Restart() {
t.ticker.Stop()
t.ticker = time.NewTicker(t.duration)
}
// newTicker is a helper to setup a ticker by giving an Governance. If
// the governace object implements a ticker generator, a ticker from that
// generator would be returned, else constructs a default one.
func newTicker(gov Governance, round uint64, tickerType TickerType) (t Ticker) {
type tickerGenerator interface {
NewTicker(TickerType) Ticker
}
if gen, ok := gov.(tickerGenerator); ok {
t = gen.NewTicker(tickerType)
}
if t == nil {
var duration time.Duration
switch tickerType {
case TickerBA:
duration = utils.GetConfigWithPanic(gov, round, nil).LambdaBA
case TickerDKG:
duration = utils.GetConfigWithPanic(gov, round, nil).LambdaDKG
case TickerCRS:
duration = utils.GetConfigWithPanic(gov, round, nil).RoundInterval / 2
}
t = newDefaultTicker(duration)
}
return
}
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