forked from mystiq/dex
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
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// Copyright 2015 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 raft
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import (
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"fmt"
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pb "go.etcd.io/etcd/raft/raftpb"
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"go.etcd.io/etcd/raft/tracker"
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)
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// Status contains information about this Raft peer and its view of the system.
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// The Progress is only populated on the leader.
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type Status struct {
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BasicStatus
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Config tracker.Config
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Progress map[uint64]tracker.Progress
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}
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// BasicStatus contains basic information about the Raft peer. It does not allocate.
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type BasicStatus struct {
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ID uint64
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pb.HardState
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SoftState
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Applied uint64
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LeadTransferee uint64
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}
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func getProgressCopy(r *raft) map[uint64]tracker.Progress {
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m := make(map[uint64]tracker.Progress)
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r.prs.Visit(func(id uint64, pr *tracker.Progress) {
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var p tracker.Progress
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p = *pr
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p.Inflights = pr.Inflights.Clone()
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pr = nil
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m[id] = p
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})
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return m
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}
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func getBasicStatus(r *raft) BasicStatus {
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s := BasicStatus{
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ID: r.id,
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LeadTransferee: r.leadTransferee,
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}
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s.HardState = r.hardState()
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s.SoftState = *r.softState()
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s.Applied = r.raftLog.applied
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return s
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}
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// getStatus gets a copy of the current raft status.
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func getStatus(r *raft) Status {
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var s Status
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s.BasicStatus = getBasicStatus(r)
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if s.RaftState == StateLeader {
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s.Progress = getProgressCopy(r)
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}
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s.Config = r.prs.Config.Clone()
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return s
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}
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// MarshalJSON translates the raft status into JSON.
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// TODO: try to simplify this by introducing ID type into raft
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func (s Status) MarshalJSON() ([]byte, error) {
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j := fmt.Sprintf(`{"id":"%x","term":%d,"vote":"%x","commit":%d,"lead":"%x","raftState":%q,"applied":%d,"progress":{`,
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s.ID, s.Term, s.Vote, s.Commit, s.Lead, s.RaftState, s.Applied)
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if len(s.Progress) == 0 {
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j += "},"
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} else {
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for k, v := range s.Progress {
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subj := fmt.Sprintf(`"%x":{"match":%d,"next":%d,"state":%q},`, k, v.Match, v.Next, v.State)
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j += subj
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}
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// remove the trailing ","
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j = j[:len(j)-1] + "},"
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}
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j += fmt.Sprintf(`"leadtransferee":"%x"}`, s.LeadTransferee)
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return []byte(j), nil
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}
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func (s Status) String() string {
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b, err := s.MarshalJSON()
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if err != nil {
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raftLogger.Panicf("unexpected error: %v", err)
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}
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return string(b)
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}
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