func (c *MaxVolumeIdCommand) Apply(server raft.Server) (interface{}, error) {
topo := server.Context().(*Topology)
before := topo.GetMaxVolumeId()
topo.UpAdjustMaxVolumeId(c.MaxVolumeId)
glog.V(4).Infoln("max volume id", before, "==>", topo.GetMaxVolumeId())
return nil, nil
}
// Apply implements goraft Command interface's Apply function
// It puts a key-value pair in KVstore
func (c *CreateVolCommand) Apply(server raft.Server) (interface{}, error) {
dir := server.Context().(*Directory)
maxVolID := uint32(0)
for _, volidip := range dir.volIDIPs {
if volidip.ID > maxVolID {
maxVolID = volidip.ID
}
}
maxVolID++
storeIPs, err := dir.pickStoreServer(c.ReplicateStr)
if err != nil {
return nil, err
}
volIDIP := VolumeIDIP{
ID: maxVolID,
IP: storeIPs,
}
dir.volIDIPs = append(dir.volIDIPs, volIDIP)
bytes, err := json.Marshal(dir.volIDIPs)
if err = ioutil.WriteFile(filepath.Join(dir.confPath, "vol.conf.json"), bytes, 0644); err != nil {
return nil, err
}
return volIDIP, nil
}