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|
package nebula
import (
"sync/atomic"
"time"
"github.com/sirupsen/logrus"
"github.com/slackhq/nebula/config"
)
type Punchy struct {
atomicPunch int32
atomicRespond int32
atomicDelay time.Duration
l *logrus.Logger
}
func NewPunchyFromConfig(l *logrus.Logger, c *config.C) *Punchy {
p := &Punchy{l: l}
p.reload(c, true)
c.RegisterReloadCallback(func(c *config.C) {
p.reload(c, false)
})
return p
}
func (p *Punchy) reload(c *config.C, initial bool) {
if initial {
var yes bool
if c.IsSet("punchy.punch") {
yes = c.GetBool("punchy.punch", false)
} else {
// Deprecated fallback
yes = c.GetBool("punchy", false)
}
if yes {
atomic.StoreInt32(&p.atomicPunch, 1)
} else {
atomic.StoreInt32(&p.atomicPunch, 0)
}
} else if c.HasChanged("punchy.punch") || c.HasChanged("punchy") {
//TODO: it should be relatively easy to support this, just need to be able to cancel the goroutine and boot it up from here
p.l.Warn("Changing punchy.punch with reload is not supported, ignoring.")
}
if initial || c.HasChanged("punchy.respond") || c.HasChanged("punch_back") {
var yes bool
if c.IsSet("punchy.respond") {
yes = c.GetBool("punchy.respond", false)
} else {
// Deprecated fallback
yes = c.GetBool("punch_back", false)
}
if yes {
atomic.StoreInt32(&p.atomicRespond, 1)
} else {
atomic.StoreInt32(&p.atomicRespond, 0)
}
if !initial {
p.l.Infof("punchy.respond changed to %v", p.GetRespond())
}
}
//NOTE: this will not apply to any in progress operations, only the next one
if initial || c.HasChanged("punchy.delay") {
atomic.StoreInt64((*int64)(&p.atomicDelay), (int64)(c.GetDuration("punchy.delay", time.Second)))
if !initial {
p.l.Infof("punchy.delay changed to %s", p.GetDelay())
}
}
}
func (p *Punchy) GetPunch() bool {
return atomic.LoadInt32(&p.atomicPunch) == 1
}
func (p *Punchy) GetRespond() bool {
return atomic.LoadInt32(&p.atomicRespond) == 1
}
func (p *Punchy) GetDelay() time.Duration {
return (time.Duration)(atomic.LoadInt64((*int64)(&p.atomicDelay)))
}
|
