// Copyright 2021 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.

package p2p

import (
	proto "github.com/pingcap/tiflow/proto/p2p"
)

type (
	// NodeID represents the identifier of a sender node.
	// Using IP address is not enough because of possible restarts.
	NodeID = string
	// Topic represents the topic for a peer-to-peer message
	Topic = string
	// Seq represents the serial number of a message for a given topic.
	Seq = int64
	// MessageServerStream is an alias for the protobuf-generated interface for the message service.
	MessageServerStream = proto.CDCPeerToPeer_SendMessageServer
	// MessageClientStream is an alias for the protobuf-generated interface for the message service.
	MessageClientStream = proto.CDCPeerToPeer_SendMessageClient
)

// MessageEntry is an alias for the protobuf-generated type for a message.
type MessageEntry = *proto.MessageEntry

// RawMessageEntry is an alias for the protobuf-generated type for a message.
type RawMessageEntry struct {
	topic Topic
	value interface{}
}