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package wait
import (
"context"
"errors"
"reflect"
"time"
)
// Implement interface
var (
_ Strategy = (*MultiStrategy)(nil)
_ StrategyTimeout = (*MultiStrategy)(nil)
)
type MultiStrategy struct {
// all Strategies should have a startupTimeout to avoid waiting infinitely
timeout *time.Duration
deadline *time.Duration
// additional properties
Strategies []Strategy
}
// WithStartupTimeoutDefault sets the default timeout for all inner wait strategies
func (ms *MultiStrategy) WithStartupTimeoutDefault(timeout time.Duration) *MultiStrategy {
ms.timeout = &timeout
return ms
}
// WithStartupTimeout sets a time.Duration which limits all wait strategies
//
// Deprecated: use WithDeadline
func (ms *MultiStrategy) WithStartupTimeout(timeout time.Duration) Strategy {
return ms.WithDeadline(timeout)
}
// WithDeadline sets a time.Duration which limits all wait strategies
func (ms *MultiStrategy) WithDeadline(deadline time.Duration) *MultiStrategy {
ms.deadline = &deadline
return ms
}
func ForAll(strategies ...Strategy) *MultiStrategy {
return &MultiStrategy{
Strategies: strategies,
}
}
func (ms *MultiStrategy) Timeout() *time.Duration {
return ms.timeout
}
func (ms *MultiStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) error {
var cancel context.CancelFunc
if ms.deadline != nil {
ctx, cancel = context.WithTimeout(ctx, *ms.deadline)
defer cancel()
}
if len(ms.Strategies) == 0 {
return errors.New("no wait strategy supplied")
}
for _, strategy := range ms.Strategies {
if strategy == nil || reflect.ValueOf(strategy).IsNil() {
// A module could be appending strategies after part of the container initialization,
// and use wait.ForAll on a not initialized strategy.
// In this case, we just skip the nil strategy.
continue
}
strategyCtx := ctx
// Set default Timeout when strategy implements StrategyTimeout
if st, ok := strategy.(StrategyTimeout); ok {
if ms.Timeout() != nil && st.Timeout() == nil {
strategyCtx, cancel = context.WithTimeout(ctx, *ms.Timeout())
defer cancel()
}
}
err := strategy.WaitUntilReady(strategyCtx, target)
if err != nil {
return err
}
}
return nil
}
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