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utils: export WaitObserver methods into wait package
Signed-off-by: Gilberto Bertin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // Copyright Authors of Cilium | ||
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| package wait | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
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| "github.com/cilium/cilium-cli/defaults" | ||
| ) | ||
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| type LogFunc func(err error, waitTime string) | ||
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| type Parameters struct { | ||
| RetryInterval time.Duration | ||
| WarningInterval time.Duration | ||
| Timeout time.Duration | ||
| Log LogFunc | ||
| } | ||
|
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| func (w Parameters) retryInterval() time.Duration { | ||
| if w.RetryInterval != time.Duration(0) { | ||
| return w.RetryInterval | ||
| } | ||
|
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| return defaults.WaitRetryInterval | ||
| } | ||
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| func (w Parameters) warningInterval() time.Duration { | ||
| if w.WarningInterval != time.Duration(0) { | ||
| return w.WarningInterval | ||
| } | ||
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| return defaults.WaitWarningInterval | ||
| } | ||
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| type Observer struct { | ||
| ctx context.Context | ||
| params Parameters | ||
| lastWarning time.Time | ||
| waitStarted time.Time | ||
| cancel context.CancelFunc | ||
| } | ||
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| func NewObserver(ctx context.Context, p Parameters) *Observer { | ||
| w := &Observer{ | ||
| ctx: ctx, | ||
| params: p, | ||
| waitStarted: time.Now(), | ||
| } | ||
|
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| if p.Timeout != time.Duration(0) { | ||
| w.ctx, w.cancel = context.WithTimeout(ctx, p.Timeout) | ||
| } | ||
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| return w | ||
| } | ||
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| func (w *Observer) Cancel() { | ||
| if w.cancel != nil { | ||
| w.cancel() | ||
| } | ||
| } | ||
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| func (w *Observer) Retry(err error) error { | ||
| if w.params.Log != nil && time.Since(w.lastWarning) > w.params.warningInterval() { | ||
| waitString := time.Since(w.waitStarted).Truncate(time.Second).String() | ||
| w.params.Log(err, waitString) | ||
| w.lastWarning = time.Now() | ||
| } | ||
|
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| select { | ||
| case <-w.ctx.Done(): | ||
| if err != nil { | ||
| return fmt.Errorf("timeout while waiting for condition, last error: %s", err) | ||
| } | ||
| return fmt.Errorf("timeout while waiting for condition") | ||
| case <-time.After(w.params.retryInterval()): | ||
| } | ||
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| return nil | ||
| } |