func (vg *VolumeGrowth) grow(topo *topology.Topology, vid storage.VolumeId, repType storage.ReplicationType, servers ...*topology.DataNode) error {
for _, server := range servers {
if err := operation.AllocateVolume(server, vid, repType); err == nil {
vi := storage.VolumeInfo{Id: vid, Size: 0, RepType: repType}
server.AddOrUpdateVolume(vi)
topo.RegisterVolumeLayout(&vi, server)
fmt.Println("Created Volume", vid, "on", server)
} else {
fmt.Println("Failed to assign", vid, "to", servers)
return errors.New("Failed to assign " + vid.String())
}
}
return nil
}
func vacuumVolume_Commit(urlLocation string, vid storage.VolumeId) error {
values := make(url.Values)
values.Add("volume", vid.String())
jsonBlob, err := util.Post("http://"+urlLocation+"/admin/vacuum_volume_commit", values)
if err != nil {
return err
}
var ret VacuumVolumeResult
if err := json.Unmarshal(jsonBlob, &ret); err != nil {
return err
}
if ret.Error != "" {
return errors.New(ret.Error)
}
return nil
}
//TODO: Add a caching for vid here
func Lookup(server string, vid storage.VolumeId) (*LookupResult, error) {
values := make(url.Values)
values.Add("volumeId", vid.String())
jsonBlob, err := util.Post("http://"+server+"/dir/lookup", values)
if err != nil {
return nil, err
}
var ret LookupResult
err = json.Unmarshal(jsonBlob, &ret)
if err != nil {
return nil, err
}
if ret.Error != "" {
return nil, errors.New(ret.Error)
}
return &ret, nil
}
func AllocateVolume(dn *topology.DataNode, vid storage.VolumeId, repType storage.ReplicationType) error {
values := make(url.Values)
values.Add("volume", vid.String())
values.Add("replicationType", repType.String())
jsonBlob, err := util.Post("http://"+dn.Url()+"/admin/assign_volume", values)
if err != nil {
return err
}
var ret AllocateVolumeResult
if err := json.Unmarshal(jsonBlob, &ret); err != nil {
return err
}
if ret.Error != "" {
return errors.New(ret.Error)
}
return nil
}