forked from ngaut/unistore
/
router.go
133 lines (115 loc) · 3.23 KB
/
router.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
// Copyright 2019-present 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 raftstore
import (
"sync"
"sync/atomic"
"time"
"github.com/ngaut/unistore/tikv/raftstore/raftlog"
"github.com/pingcap/kvproto/pkg/kvrpcpb"
"github.com/pingcap/kvproto/pkg/metapb"
"github.com/pingcap/kvproto/pkg/raft_cmdpb"
"github.com/pingcap/kvproto/pkg/raft_serverpb"
"github.com/pingcap/errors"
)
// router routes a message to a peer.
type router struct {
peers sync.Map
peerSender chan Msg
storeSender chan<- Msg
storeFsm *storeFsm
}
func newRouter(storeSender chan<- Msg, storeFsm *storeFsm) *router {
pm := &router{
peerSender: make(chan Msg, 4096),
storeSender: storeSender,
storeFsm: storeFsm,
}
return pm
}
func (pr *router) get(regionID uint64) *peerState {
v, ok := pr.peers.Load(regionID)
if ok {
return v.(*peerState)
}
return nil
}
func (pr *router) register(peer *peerFsm) {
id := peer.peer.regionId
apply := newApplierFromPeer(peer)
newPeer := &peerState{
peer: peer,
apply: apply,
}
pr.peers.Store(id, newPeer)
}
func (pr *router) close(regionID uint64) {
v, ok := pr.peers.Load(regionID)
if ok {
ps := v.(*peerState)
atomic.StoreUint32(&ps.closed, 1)
pr.peers.Delete(regionID)
}
}
func (pr *router) send(regionID uint64, msg Msg) error {
msg.RegionID = regionID
p := pr.get(regionID)
if p == nil || atomic.LoadUint32(&p.closed) == 1 {
return errPeerNotFound
}
pr.peerSender <- msg
return nil
}
func (pr *router) sendRaftCommand(cmd *MsgRaftCmd) error {
regionID := cmd.Request.RegionID()
return pr.send(regionID, NewPeerMsg(MsgTypeRaftCmd, regionID, cmd))
}
func (pr *router) sendRaftMessage(msg *raft_serverpb.RaftMessage) error {
regionID := msg.RegionId
if pr.send(regionID, NewPeerMsg(MsgTypeRaftMessage, regionID, msg)) != nil {
pr.sendStore(NewPeerMsg(MsgTypeStoreRaftMessage, regionID, msg))
}
return nil
}
func (pr *router) sendStore(msg Msg) {
pr.storeSender <- msg
}
// RaftstoreRouter exports SendCommand method for other packages.
type RaftstoreRouter struct {
router *router
// TODO: add localReader here.
}
func (r *RaftstoreRouter) SendCommand(req *raft_cmdpb.RaftCmdRequest, cb *Callback) error {
// TODO: support local reader
msg := &MsgRaftCmd{
SendTime: time.Now(),
Request: raftlog.NewRequest(req),
Callback: cb,
}
return r.router.sendRaftCommand(msg)
}
func (r *RaftstoreRouter) SplitRegion(ctx *kvrpcpb.Context, keys [][]byte) ([]*metapb.Region, error) {
cb := NewCallback()
msg := &MsgSplitRegion{
RegionEpoch: ctx.RegionEpoch,
SplitKeys: keys,
Callback: cb,
}
err := r.router.send(ctx.RegionId, Msg{Type: MsgTypeSplitRegion, Data: msg})
if err != nil {
return nil, err
}
cb.wg.Wait()
return cb.resp.GetAdminResponse().GetSplits().GetRegions(), nil
}
var errPeerNotFound = errors.New("peer not found")