Beispiel #1
0
// keyWithDefaultFunc returns or accumulates key dependencies that have a
// default value.
func keyWithDefaultFunc(b *Brain, used, missing *dep.Set) func(string, string) (string, error) {
	return func(s, def string) (string, error) {
		if len(s) == 0 {
			return def, nil
		}

		d, err := dep.NewKVGetQuery(s)
		if err != nil {
			return "", err
		}

		used.Add(d)

		if value, ok := b.Recall(d); ok {
			if value == nil || value.(string) == "" {
				return def, nil
			}
			return value.(string), nil
		}

		missing.Add(d)

		return def, nil
	}
}
Beispiel #2
0
// keyFunc returns or accumulates key dependencies.
func keyFunc(b *Brain, used, missing *dep.Set) func(string) (string, error) {
	return func(s string) (string, error) {
		if len(s) == 0 {
			return "", nil
		}

		d, err := dep.NewKVGetQuery(s)
		if err != nil {
			return "", err
		}
		d.EnableBlocking()

		used.Add(d)

		if value, ok := b.Recall(d); ok {
			if value == nil {
				return "", nil
			}
			return value.(string), nil
		}

		missing.Add(d)

		return "", nil
	}
}
Beispiel #3
0
// keyExistsFunc returns true if a key exists, false otherwise.
func keyExistsFunc(b *Brain, used, missing *dep.Set) func(string) (bool, error) {
	return func(s string) (bool, error) {
		if len(s) == 0 {
			return false, nil
		}

		d, err := dep.NewKVGetQuery(s)
		if err != nil {
			return false, err
		}

		used.Add(d)

		if value, ok := b.Recall(d); ok {
			return value != nil, nil
		}

		missing.Add(d)

		return false, nil
	}
}