storage

type Storage interface {
	// Get returns the given item. If the item doesn't exist, an IsNotFoundErr
	// will be returned. The returned version should be submitted with any
	// updates to the returned object
	Get(ctx context.Context, keyspace, key string, into proto.Message) (version int64, err error)
	// Put stores the provided item. If this is an update to an existing object
	// it's version should be included; for new objects the version should be 0. If
	// the update fails because of a version conflict, an IsConflictErr will be
	// returned. Any existing expiration set on the object should be preserved.
	Put(ctx context.Context, keyspace, key string, version int64, obj proto.Message) (newVersion int64, err error)
	// PutWithExpiry is a Put, with a time that the item should no longer
	// be accessible. This doesn't guarantee that the data will be deleted at
	// the time, but Get should not return it.
	PutWithExpiry(ctx context.Context, keyspace, key string, version int64, obj proto.Message, expires time.Time) (newVersion int64, err error)
	// List retrieves all keys in the given keyspace.
	List(ctx context.Context, keyspace string) (keys []string, err error)
	// Delete removes the item. If the item doesn't exist, an IsNotFoundErr will
	// be returned.
	Delete(ctx context.Context, keyspace, key string) error
}