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scheduler_task.go
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scheduler_task.go
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package runner
import (
"context"
"github.com/Connor1996/badger"
"github.com/pingcap-incubator/tinykv/kv/raftstore/message"
"github.com/pingcap-incubator/tinykv/kv/raftstore/scheduler_client"
"github.com/pingcap-incubator/tinykv/kv/util/worker"
"github.com/pingcap-incubator/tinykv/log"
"github.com/pingcap-incubator/tinykv/proto/pkg/metapb"
"github.com/pingcap-incubator/tinykv/proto/pkg/raft_cmdpb"
"github.com/pingcap-incubator/tinykv/proto/pkg/schedulerpb"
"github.com/shirou/gopsutil/v3/disk"
)
type SchedulerAskSplitTask struct {
Region *metapb.Region
SplitKey []byte
Peer *metapb.Peer
Callback *message.Callback
}
type SchedulerRegionHeartbeatTask struct {
Region *metapb.Region
Peer *metapb.Peer
PendingPeers []*metapb.Peer
ApproximateSize *uint64
}
type SchedulerStoreHeartbeatTask struct {
Stats *schedulerpb.StoreStats
Engine *badger.DB
Path string
}
type SchedulerTaskHandler struct {
storeID uint64
SchedulerClient scheduler_client.Client
router message.RaftRouter
}
func NewSchedulerTaskHandler(storeID uint64, SchedulerClient scheduler_client.Client, router message.RaftRouter) *SchedulerTaskHandler {
return &SchedulerTaskHandler{
storeID: storeID,
SchedulerClient: SchedulerClient,
router: router,
}
}
func (r *SchedulerTaskHandler) Handle(t worker.Task) {
switch t.(type) {
case *SchedulerAskSplitTask:
r.onAskSplit(t.(*SchedulerAskSplitTask))
case *SchedulerRegionHeartbeatTask:
r.onHeartbeat(t.(*SchedulerRegionHeartbeatTask))
case *SchedulerStoreHeartbeatTask:
r.onStoreHeartbeat(t.(*SchedulerStoreHeartbeatTask))
default:
log.Errorf("unsupported worker.Task: %+v", t)
}
}
func (r *SchedulerTaskHandler) Start() {
r.SchedulerClient.SetRegionHeartbeatResponseHandler(r.storeID, r.onRegionHeartbeatResponse)
}
func (r *SchedulerTaskHandler) onRegionHeartbeatResponse(resp *schedulerpb.RegionHeartbeatResponse) {
if changePeer := resp.GetChangePeer(); changePeer != nil {
r.sendAdminRequest(resp.RegionId, resp.RegionEpoch, resp.TargetPeer, &raft_cmdpb.AdminRequest{
CmdType: raft_cmdpb.AdminCmdType_ChangePeer,
ChangePeer: &raft_cmdpb.ChangePeerRequest{
ChangeType: changePeer.ChangeType,
Peer: changePeer.Peer,
},
}, message.NewCallback())
} else if transferLeader := resp.GetTransferLeader(); transferLeader != nil {
r.sendAdminRequest(resp.RegionId, resp.RegionEpoch, resp.TargetPeer, &raft_cmdpb.AdminRequest{
CmdType: raft_cmdpb.AdminCmdType_TransferLeader,
TransferLeader: &raft_cmdpb.TransferLeaderRequest{
Peer: transferLeader.Peer,
},
}, message.NewCallback())
}
}
func (r *SchedulerTaskHandler) onAskSplit(t *SchedulerAskSplitTask) {
resp, err := r.SchedulerClient.AskSplit(context.TODO(), t.Region)
if err != nil {
log.Error(err)
return
}
aq := &raft_cmdpb.AdminRequest{
CmdType: raft_cmdpb.AdminCmdType_Split,
Split: &raft_cmdpb.SplitRequest{
SplitKey: t.SplitKey,
NewRegionId: resp.NewRegionId,
NewPeerIds: resp.NewPeerIds,
},
}
r.sendAdminRequest(t.Region.GetId(), t.Region.GetRegionEpoch(), t.Peer, aq, t.Callback)
}
func (r *SchedulerTaskHandler) onHeartbeat(t *SchedulerRegionHeartbeatTask) {
var size int64
if t.ApproximateSize != nil {
size = int64(*t.ApproximateSize)
}
req := &schedulerpb.RegionHeartbeatRequest{
Region: t.Region,
Leader: t.Peer,
PendingPeers: t.PendingPeers,
ApproximateSize: uint64(size),
}
r.SchedulerClient.RegionHeartbeat(req)
}
func (r *SchedulerTaskHandler) onStoreHeartbeat(t *SchedulerStoreHeartbeatTask) {
diskStat, err := disk.Usage(t.Path)
if err != nil {
log.Error(err)
return
}
capacity := diskStat.Total
lsmSize, vlogSize := t.Engine.Size()
usedSize := t.Stats.UsedSize + uint64(lsmSize) + uint64(vlogSize) // t.Stats.UsedSize contains size of snapshot files.
available := uint64(0)
if capacity > usedSize {
available = capacity - usedSize
}
t.Stats.Capacity = capacity
t.Stats.UsedSize = usedSize
t.Stats.Available = available
r.SchedulerClient.StoreHeartbeat(context.TODO(), t.Stats)
}
func (r *SchedulerTaskHandler) sendAdminRequest(regionID uint64, epoch *metapb.RegionEpoch, peer *metapb.Peer, req *raft_cmdpb.AdminRequest, callback *message.Callback) {
cmd := &raft_cmdpb.RaftCmdRequest{
Header: &raft_cmdpb.RaftRequestHeader{
RegionId: regionID,
Peer: peer,
RegionEpoch: epoch,
},
AdminRequest: req,
}
r.router.SendRaftCommand(cmd, callback)
}