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pkg/services: add Engine.GoTickUntil #2003

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pkg/services: add Engine.GoTickUntil #2003

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20 changes: 20 additions & 0 deletions pkg/services/service.go
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,26 @@ func (e *Engine) GoTick(ticker *timeutil.Ticker, fn func(context.Context)) {
})
}

// GoTickUntil is like GoTick but halts when fn returns true, and closes the returned chan.
func (e *Engine) GoTickUntil(ticker *timeutil.Ticker, fn func(context.Context) bool) <-chan struct{} {
ch := make(chan struct{})
e.Go(func(ctx context.Context) {
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
if fn(ctx) {
close(ch)
return
}
}
}
})
return ch
}

// Tracer returns the otel tracer with service attributes included.
func (e *Engine) Tracer() trace.Tracer {
return e.tracer
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