services/syncbase/server/interfaces/sync.vdl

// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package interfaces

import (
	wire "v.io/syncbase/v23/services/syncbase/nosql"
)

// Sync defines methods for data exchange between Syncbases.
// TODO(hpucha): Flesh this out further.
type Sync interface {
	// GetDeltas returns the responder's current generation vector
	// and all the missing log records when compared to the
	// initiator's generation vector.
	GetDeltas() error

	// SyncGroup-related methods.

	// PublishSyncGroup is typically invoked on a "central" peer
	// to publish the SyncGroup.
	PublishSyncGroup(sg SyncGroup) error

	// JoinSyncGroupAtAdmin is invoked by a prospective SyncGroup member's
	// Syncbase on a SyncGroup admin. It checks whether the requestor is
	// allowed to join the named SyncGroup, and if so, adds the requestor to
	// the SyncGroup.
	JoinSyncGroupAtAdmin(sgName, joinerName string, myInfo wire.SyncGroupMemberInfo) (SyncGroup | error)

	// BlobSync methods.
	// FetchBlob returns the requested blob.
	FetchBlob() error
}