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ticker/ticker: rename ticker -> T

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In this commit, we rename the previously unexported ticker into T,
making it exported along the way. This is nice as we now have access to
the actual interface implementation without the need of making further
type assertions.
This commit is contained in:
Wilmer Paulino 2019-02-06 16:46:00 -08:00
parent e9fb6100f2
commit faccccf93f
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GPG Key ID: 6DF57B9F9514972F
1 changed files with 14 additions and 11 deletions
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25
ticker/ticker.go
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@ -60,10 +60,10 @@ type Ticker interface {
Stop()
}
// ticker is the production implementation of the resumable Ticker interface.
// This allows various components to toggle their need for tick events, which
// may vary depending on system load.
type ticker struct {
// T is the production implementation of the resumable Ticker interface. This
// allows various components to toggle their need for tick events, which may
// vary depending on system load.
type T struct {
// interval is the desired duration between ticks when active.
interval time.Duration
@ -73,10 +73,13 @@ type ticker struct {
ticker *time.Ticker
}
// A compile-time constraint to ensure T satisfies the Ticker interface.
var _ Ticker = (*T)(nil)
// New returns a new ticker that signals with the given interval when not
// paused. The ticker starts off inactive.
func New(interval time.Duration) Ticker {
return &ticker{
func New(interval time.Duration) *T {
return &T{
interval: interval,
}
}
@ -85,18 +88,18 @@ func New(interval time.Duration) Ticker {
// prescribed interval. This method returns nil when the ticker is paused.
//
// NOTE: Part of the Ticker interface.
func (t *ticker) Ticks() <-chan time.Time {
func (t *T) Ticks() <-chan time.Time {
if t.ticker == nil {
return nil
}
return t.ticker.C
}
// Resumes starts underlying time.Ticker and causes the ticker to begin
// Resume starts underlying time.Ticker and causes the ticker to begin
// delivering scheduled events.
//
// NOTE: Part of the Ticker interface.
func (t *ticker) Resume() {
func (t *T) Resume() {
if t.ticker == nil {
t.ticker = time.NewTicker(t.interval)
}
@ -106,7 +109,7 @@ func (t *ticker) Resume() {
// regular intervals.
//
// NOTE: Part of the Ticker interface.
func (t *ticker) Pause() {
func (t *T) Pause() {
if t.ticker != nil {
t.ticker.Stop()
t.ticker = nil
@ -118,6 +121,6 @@ func (t *ticker) Pause() {
// implementation, this is equivalent to Pause.
//
// NOTE: Part of the Ticker interface.
func (t *ticker) Stop() {
func (t *T) Stop() {
t.Pause()
}