/
sm_multi_modify.go
197 lines (158 loc) · 5.24 KB
/
sm_multi_modify.go
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package stream_manager
import (
"bytes"
"context"
"fmt"
"github.com/journeymidnight/autumn/etcd_utils"
"github.com/journeymidnight/autumn/proto/pb"
"github.com/journeymidnight/autumn/proto/pspb"
"github.com/journeymidnight/autumn/utils"
"github.com/journeymidnight/autumn/wire_errors"
"github.com/pkg/errors"
clientv3 "go.etcd.io/etcd/client/v3"
)
//duplicateStream copy all extents in srcStream to desStream.
func (sm *StreamManager) duplicateStream(ops *[]clientv3.Op, srcStreamID uint64, destStreamID uint64, sealedLength uint32) (func(), func(), error) {
streamInfo, ok := sm.cloneStreamInfo(srcStreamID)
if !ok {
return nil, nil, errors.Errorf("stream %d no exist", srcStreamID)
}
newStreamInfo := pb.StreamInfo{
StreamID: destStreamID,
}
unlockExtents := func () {
for _, extentID := range streamInfo.ExtentIDs {
sm.unlockExtent(extentID)
}
}
var updateExInfos []*pb.ExtentInfo
//unlock
for i, extentID := range streamInfo.ExtentIDs {
if err := sm.lockExtent(extentID); err != nil {
for j := 0; j < i; j++ {
sm.unlockExtent(streamInfo.ExtentIDs[j])
}
return nil, nil, err
}
exInfo, ok := sm.cloneExtentInfo(extentID)
if !ok {
for j := 0; j < i; j++ {
sm.unlockExtent(streamInfo.ExtentIDs[j])
}
return nil, nil, errors.Errorf("%d not in stream %d no exist", extentID, srcStreamID)
}
newStreamInfo.ExtentIDs = append(newStreamInfo.ExtentIDs, extentID)
if i == len(streamInfo.ExtentIDs) - 1 && exInfo.Avali == 0 { // last extent is not sealed
exInfo.Eversion++
exInfo.Refs++
exInfo.SealedLength = uint64(sealedLength)
n := len(exInfo.Replicates) + len(exInfo.Parity)
exInfo.Avali = (1 << n) - 1
} else {
exInfo.Eversion++
exInfo.Refs++
}
*ops = append(*ops, clientv3.OpPut(formatExtentKey(extentID), string(utils.MustMarshal(exInfo))))
fmt.Printf("update extent %d: %v\n", extentID, exInfo)
updateExInfos = append(updateExInfos, exInfo)
}
*ops = append(*ops, clientv3.OpPut(formatStreamKey(destStreamID), string(utils.MustMarshal(&newStreamInfo))))
//return failedOps, succeedOps, error
return func(){
unlockExtents()
},
func(){
for _, exInfo := range updateExInfos {
sm.extents.Set(exInfo.ExtentID, exInfo)
}
unlockExtents()
sm.streams.Set(destStreamID, &newStreamInfo)
fmt.Printf("update stream %d: %v\n", destStreamID, newStreamInfo)
}, nil
}
func (sm *StreamManager) MultiModifySplit(ctx context.Context, req *pb.MultiModifySplitRequest) (*pb.MultiModifySplitResponse, error) {
errDone := func(err error) (*pb.MultiModifySplitResponse, error){
code, desCode := wire_errors.ConvertToPBCode(err)
return &pb.MultiModifySplitResponse{
Code: code,
CodeDes: desCode,
}, nil
}
if !sm.AmLeader() {
return errDone(wire_errors.NotLeader)
}
data, _, err := etcd_utils.EtcdGetKV(sm.client, fmt.Sprintf("PART/%d", req.PartID))
if err != nil {
return errDone(err)
}
var meta pspb.PartitionMeta
if err = meta.Unmarshal(data); err != nil {
return errDone(err)
}
if bytes.Compare(req.MidKey, meta.Rg.StartKey) >= 0 && (len(meta.Rg.EndKey) == 0 || bytes.Compare(req.MidKey, meta.Rg.EndKey) < 0 ) {
} else {
//duplicated request ?
return &pb.MultiModifySplitResponse{
Code: pb.Code_OK,
}, nil
//return errDone(errors.Errorf("midkey is %s, not in [%s, %s)", req.MidKey, meta.Rg.StartKey, meta.Rg.EndKey))
}
//copy rowStream, logStream and metaStream
n := 1 + 3 // 1 == new partID, 2 == rowStream + logStream + metaStream
var ops []clientv3.Op
start, end, err := sm.allocUniqID(uint64(n))
if err != nil {
return errDone(err)
}
var successOps []func()
var failedOps []func()
//WARNING: can not change orders : log, row,meta
f, s, err := sm.duplicateStream(&ops, meta.LogStream, start, req.LogStreamSealedLength)
if err != nil {
return errDone(err)
}
successOps = append(successOps, s)
failedOps = append(failedOps, f)
f, s, err = sm.duplicateStream(&ops, meta.RowStream, start +1, req.RowStreamSealedLength)
if err != nil {
return errDone(err)
}
successOps = append(successOps, s)
failedOps = append(failedOps, f)
f, s, err = sm.duplicateStream(&ops, meta.MetaStream, start +2, req.MetaStreamSealedLength)
if err != nil {
return errDone(err)
}
successOps = append(successOps, s)
failedOps = append(failedOps, f)
newPartID := end - 1
newMeta := pspb.PartitionMeta{
LogStream: start,
RowStream: start+1,
MetaStream: start+2,
Rg:&pspb.Range{StartKey: req.MidKey, EndKey: meta.Rg.EndKey},
PartID: newPartID,
}
ops = append(ops, clientv3.OpPut(fmt.Sprintf("PART/%d", newPartID), string(utils.MustMarshal(&newMeta))))
//update original meta's EndKey to midKEY
meta.Rg.EndKey = req.MidKey
ops = append(ops, clientv3.OpPut(fmt.Sprintf("PART/%d", req.PartID), string(utils.MustMarshal(&meta))))
err = etcd_utils.EtcdSetKVS(sm.client, []clientv3.Cmp{
clientv3.Compare(clientv3.Value(sm.leaderKey), "=", sm.memberValue),
clientv3.Compare(clientv3.CreateRevision(req.OwnerKey), "=", req.Revision),
}, ops)
//setting ETCD failed, unlock extents
if err != nil {
for _, f := range failedOps {
f()
}
return errDone(err)
}
//setting ETCD success, update extent/stream info in memory and unlock extents
for _, s := range successOps {
s()
}
return &pb.MultiModifySplitResponse{
Code: pb.Code_OK,
}, nil
}