legacy

type Backend interface {
	// GetKeys returns a list of keys for a given path
	GetKeys(bucket []string) ([]string, error)
	// GetItems returns a list of items (key value pairs) for a bucket.
	GetItems(bucket []string, opts ...OpOption) ([]Item, error)
	// CreateVal creates value with a given TTL and key in the bucket
	// if the value already exists, it must return trace.AlreadyExistsError
	CreateVal(bucket []string, key string, val []byte, ttl time.Duration) error
	// UpsertVal updates or inserts value with a given TTL into a bucket
	// ForeverTTL for no TTL
	UpsertVal(bucket []string, key string, val []byte, ttl time.Duration) error
	// UpsertItems updates or inserts all passed in backend.Items (with a TTL)
	// into the given bucket.
	UpsertItems(bucket []string, items []Item) error
	// GetVal return a value for a given key in the bucket
	GetVal(path []string, key string) ([]byte, error)
	// CompareAndSwapVal compares and swaps values in atomic operation,
	// succeeds if prevVal matches the value stored in the database,
	// requires prevVal as a non-empty value. Returns trace.CompareFailed
	// in case if value did not match.
	CompareAndSwapVal(bucket []string, key string, val []byte, prevVal []byte, ttl time.Duration) error
	// DeleteKey deletes a key in a bucket
	DeleteKey(bucket []string, key string) error
	// DeleteBucket deletes the bucket by a given path
	DeleteBucket(path []string, bkt string) error
	// AcquireLock grabs a lock that will be released automatically in TTL
	AcquireLock(token string, ttl time.Duration) error
	// ReleaseLock forces lock release before TTL
	ReleaseLock(token string) error
	// Close releases the resources taken up by this backend
	Close() error
	// Clock returns clock used by this backend
	Clock() clockwork.Clock
}

type Config struct {
	// Type can be "bolt" or "etcd" or "dynamodb"
	Type string `yaml:"type,omitempty"`

	// Params is a generic key/value property bag which allows arbitrary
	// falues to be passed to backend
	Params Params `yaml:",inline"`
}

type Exporter interface {
	// Export exports all items from the backend in new backend Items
	Export() ([]backend.Item, error)
	// Close closes importer
	Close() error
}

type Importer interface {
	// Import imports elements, makes sure elements are imported only once
	// returns trace.AlreadyExists if elements have been imported
	Import(ctx context.Context, items []backend.Item) error
	// Imported returns true if backend already imported data from another backend
	Imported(ctx context.Context) (bool, error)
	// Close closes importer
	Close() error
}

type Item struct {
	// FullPath is set to full path
	FullPath string
	// Key is an item key.
	Key string
	// Value is an item value.
	Value []byte
	// TTL is the expire time for the item.
	TTL time.Duration
}

type Items []Item

type NameFunc func() string

type NewExporterFunc func() (Exporter, error)

type NewFunc func(Params) (Backend, error)

type OpConfig struct {
	// Recursive triggers recursive get
	Recursive bool
	// KeysOnly fetches only keys
	KeysOnly bool
}

type OpOption func(*OpConfig) error

type Params map[string]interface{}