seaweedfs/go/topology/cluster_commands.go
Chris Lu 41143b3b78 toughen weedfs clustering, adding synchronizing max volume id among
peers in order to avoid the same volume id being assigned twice
1. moving raft.Server to topology
2. adding max volume id command for raft
2014-03-15 23:03:49 -07:00

32 lines
711 B
Go

package topology
import (
"code.google.com/p/weed-fs/go/glog"
"code.google.com/p/weed-fs/go/storage"
"github.com/goraft/raft"
)
type MaxVolumeIdCommand struct {
MaxVolumeId storage.VolumeId `json:"maxVolumeId"`
}
func NewMaxVolumeIdCommand(value storage.VolumeId) *MaxVolumeIdCommand {
return &MaxVolumeIdCommand{
MaxVolumeId: value,
}
}
func (c *MaxVolumeIdCommand) CommandName() string {
return "MaxVolumeId"
}
func (c *MaxVolumeIdCommand) Apply(server raft.Server) (interface{}, error) {
topo := server.Context().(*Topology)
before := topo.GetMaxVolumeId()
topo.UpAdjustMaxVolumeId(c.MaxVolumeId)
glog.V(0).Infoln("max volume id", before, "==>", topo.GetMaxVolumeId())
return nil, nil
}