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listener.go
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/
listener.go
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// Copyright 2017-2021 Lei Ni (nilei81@gmail.com) and other contributors.
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package raftio
const (
// NoLeader is a special leader ID value to indicate that there is currently
// no leader or leader ID is unknown.
NoLeader uint64 = 0
)
// LeaderInfo contains info on Raft leader.
type LeaderInfo struct {
ShardID uint64
ReplicaID uint64
Term uint64
LeaderID uint64
}
// IRaftEventListener is the interface to allow users to get notified for
// certain Raft events.
type IRaftEventListener interface {
LeaderUpdated(info LeaderInfo)
}
// EntryInfo contains info on log entries.
type EntryInfo struct {
ShardID uint64
ReplicaID uint64
Index uint64
}
// SnapshotInfo contains info of the snapshot.
type SnapshotInfo struct {
ShardID uint64
ReplicaID uint64
From uint64
Index uint64
}
// ConnectionInfo contains info of the connection.
type ConnectionInfo struct {
Address string
SnapshotConnection bool
}
// ISystemEventListener is the system event listener used by the NodeHost.
type ISystemEventListener interface {
NodeHostShuttingDown()
NodeUnloaded(info NodeInfo)
NodeDeleted(info NodeInfo)
NodeReady(info NodeInfo)
MembershipChanged(info NodeInfo)
ConnectionEstablished(info ConnectionInfo)
ConnectionFailed(info ConnectionInfo)
SendSnapshotStarted(info SnapshotInfo)
SendSnapshotCompleted(info SnapshotInfo)
SendSnapshotAborted(info SnapshotInfo)
SnapshotReceived(info SnapshotInfo)
SnapshotRecovered(info SnapshotInfo)
SnapshotCreated(info SnapshotInfo)
SnapshotCompacted(info SnapshotInfo)
LogCompacted(info EntryInfo)
LogDBCompacted(info EntryInfo)
}