59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
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// Copyright 2019 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package quorum
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import (
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"math"
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"strconv"
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)
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// Index is a Raft log position.
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type Index uint64
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func (i Index) String() string {
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if i == math.MaxUint64 {
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return "∞"
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}
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return strconv.FormatUint(uint64(i), 10)
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}
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// AckedIndexer allows looking up a commit index for a given ID of a voter
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// from a corresponding MajorityConfig.
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type AckedIndexer interface {
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AckedIndex(voterID uint64) (idx Index, found bool)
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}
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type mapAckIndexer map[uint64]Index
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func (m mapAckIndexer) AckedIndex(id uint64) (Index, bool) {
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idx, ok := m[id]
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return idx, ok
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}
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// VoteResult indicates the outcome of a vote.
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//
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//go:generate stringer -type=VoteResult
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type VoteResult uint8
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const (
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// VotePending indicates that the decision of the vote depends on future
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// votes, i.e. neither "yes" or "no" has reached quorum yet.
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VotePending VoteResult = 1 + iota
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// VoteLost indicates that the quorum has voted "no".
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VoteLost
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// VoteWon indicates that the quorum has voted "yes".
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VoteWon
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)
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