47 lines
916 B
Go
47 lines
916 B
Go
package resource
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import (
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"time"
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)
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// RetryFunc is the function retried until it succeeds.
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type RetryFunc func() error
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// Retry is a basic wrapper around StateChangeConf that will just retry
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// a function until it no longer returns an error.
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func Retry(timeout time.Duration, f RetryFunc) error {
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var err error
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c := &StateChangeConf{
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Pending: []string{"error"},
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Target: "success",
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Timeout: timeout,
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MinTimeout: 500 * time.Millisecond,
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Refresh: func() (interface{}, string, error) {
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err = f()
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if err == nil {
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return 42, "success", nil
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}
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if rerr, ok := err.(RetryError); ok {
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err = rerr.Err
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return nil, "quit", err
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}
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return 42, "error", nil
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},
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}
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c.WaitForState()
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return err
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}
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// RetryError, if returned, will quit the retry immediately with the
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// Err.
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type RetryError struct {
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Err error
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}
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func (e RetryError) Error() string {
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return e.Err.Error()
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}
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