90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
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package wait
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import (
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"context"
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"strings"
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"time"
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)
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// Implement interface
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var _ Strategy = (*ExitStrategy)(nil)
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var _ StrategyTimeout = (*ExitStrategy)(nil)
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// ExitStrategy will wait until container exit
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type ExitStrategy struct {
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// all Strategies should have a timeout to avoid waiting infinitely
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timeout *time.Duration
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// additional properties
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PollInterval time.Duration
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}
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// NewExitStrategy constructs with polling interval of 100 milliseconds without timeout by default
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func NewExitStrategy() *ExitStrategy {
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return &ExitStrategy{
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PollInterval: defaultPollInterval(),
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}
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}
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// fluent builders for each property
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// since go has neither covariance nor generics, the return type must be the type of the concrete implementation
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// this is true for all properties, even the "shared" ones
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// WithExitTimeout can be used to change the default exit timeout
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func (ws *ExitStrategy) WithExitTimeout(exitTimeout time.Duration) *ExitStrategy {
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ws.timeout = &exitTimeout
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return ws
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}
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// WithPollInterval can be used to override the default polling interval of 100 milliseconds
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func (ws *ExitStrategy) WithPollInterval(pollInterval time.Duration) *ExitStrategy {
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ws.PollInterval = pollInterval
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return ws
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}
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// ForExit is the default construction for the fluid interface.
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//
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// For Example:
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//
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// wait.
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// ForExit().
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// WithPollInterval(1 * time.Second)
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func ForExit() *ExitStrategy {
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return NewExitStrategy()
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}
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func (ws *ExitStrategy) Timeout() *time.Duration {
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return ws.timeout
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}
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// WaitUntilReady implements Strategy.WaitUntilReady
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func (ws *ExitStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) (err error) {
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if ws.timeout != nil {
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var cancel context.CancelFunc
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ctx, cancel = context.WithTimeout(ctx, *ws.timeout)
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defer cancel()
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}
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for {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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state, err := target.State(ctx)
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if err != nil {
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if !strings.Contains(err.Error(), "No such container") {
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return err
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} else {
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return nil
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}
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}
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if state.Running {
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time.Sleep(ws.PollInterval)
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continue
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}
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return nil
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}
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}
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}
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