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This is helpful to quickly print the configuration log messages without having to specify Voters and Learners separately. It will also come in handy for joint quorums because it allows holding on to voters and learners as a unit, which is useful for unit testing.
59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
// 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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