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114 lines
3.2 KiB
114 lines
3.2 KiB
package weed_server
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import (
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"context"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"time"
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)
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// Lock is a grpc handler to handle FilerServer's LockRequest
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func (fs *FilerServer) Lock(ctx context.Context, req *filer_pb.LockRequest) (resp *filer_pb.LockResponse, err error) {
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resp = &filer_pb.LockResponse{}
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var movedTo pb.ServerAddress
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expiredAtNs := time.Now().Add(time.Duration(req.SecondsToLock) * time.Second).UnixNano()
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resp.RenewToken, movedTo, err = fs.filer.Dlm.LockWithTimeout(req.Name, expiredAtNs, req.RenewToken)
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if !req.IsMoved && movedTo != "" {
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err = pb.WithFilerClient(false, 0, movedTo, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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secondResp, err := client.Lock(context.Background(), &filer_pb.LockRequest{
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Name: req.Name,
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SecondsToLock: req.SecondsToLock,
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RenewToken: req.RenewToken,
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IsMoved: true,
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})
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if err == nil {
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resp.RenewToken = secondResp.RenewToken
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} else {
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resp.Error = secondResp.Error
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}
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return err
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})
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}
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if err != nil {
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resp.Error = fmt.Sprintf("%v", err)
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}
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if movedTo != "" {
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resp.MovedTo = string(movedTo)
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}
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return resp, nil
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}
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// Unlock is a grpc handler to handle FilerServer's UnlockRequest
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func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest) (resp *filer_pb.UnlockResponse, err error) {
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resp = &filer_pb.UnlockResponse{}
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var movedTo pb.ServerAddress
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movedTo, err = fs.filer.Dlm.Unlock(req.Name, req.RenewToken)
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if !req.IsMoved && movedTo != "" {
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err = pb.WithFilerClient(false, 0, movedTo, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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secondResp, err := client.Unlock(context.Background(), &filer_pb.UnlockRequest{
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Name: req.Name,
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RenewToken: req.RenewToken,
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IsMoved: true,
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})
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resp.Error = secondResp.Error
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return err
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})
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}
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if err != nil {
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resp.Error = fmt.Sprintf("%v", err)
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}
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if movedTo != "" {
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resp.MovedTo = string(movedTo)
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}
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return resp, nil
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}
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// TransferLocks is a grpc handler to handle FilerServer's TransferLocksRequest
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func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.TransferLocksRequest) (*filer_pb.TransferLocksResponse, error) {
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for _, lock := range req.Locks {
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fs.filer.Dlm.InsertLock(lock.Name, lock.ExpiredAtNs, lock.RenewToken)
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}
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return &filer_pb.TransferLocksResponse{}, nil
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}
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func (fs *FilerServer) OnDlmChangeSnapshot(snapshot []pb.ServerAddress) {
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locks := fs.filer.Dlm.SelectNotOwnedLocks(snapshot)
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if len(locks) == 0 {
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return
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}
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for _, lock := range locks {
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server := fs.filer.Dlm.CalculateTargetServer(lock.Key, snapshot)
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if err := pb.WithFilerClient(false, 0, server, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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_, err := client.TransferLocks(context.Background(), &filer_pb.TransferLocksRequest{
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Locks: []*filer_pb.Lock{
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{
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Name: lock.Key,
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RenewToken: lock.Token,
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ExpiredAtNs: lock.ExpiredAtNs,
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},
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},
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})
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return err
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}); err != nil {
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// it may not be worth retrying, since the lock may have expired
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glog.Errorf("transfer lock %v to %v: %v", lock.Key, server, err)
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}
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}
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}
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