seaweedfs/go/storage/disk_location.go

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package storage
import (
"io/ioutil"
"strings"
"github.com/chrislusf/seaweedfs/go/glog"
)
type DiskLocation struct {
Directory string
MaxVolumeCount int
volumes map[VolumeId]*Volume
}
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func NewDiskLocation(dir string, maxVolumeCount int) *DiskLocation {
location := &DiskLocation{Directory: dir, MaxVolumeCount: maxVolumeCount}
location.volumes = make(map[VolumeId]*Volume)
return location
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}
func (l *DiskLocation) loadExistingVolumes(needleMapKind NeedleMapType) {
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if dirs, err := ioutil.ReadDir(l.Directory); err == nil {
for _, dir := range dirs {
name := dir.Name()
if !dir.IsDir() && strings.HasSuffix(name, ".dat") {
collection := ""
base := name[:len(name)-len(".dat")]
i := strings.LastIndex(base, "_")
if i > 0 {
collection, base = base[0:i], base[i+1:]
}
if vid, err := NewVolumeId(base); err == nil {
if l.volumes[vid] == nil {
if v, e := NewVolume(l.Directory, collection, vid, needleMapKind, nil, nil); e == nil {
l.volumes[vid] = v
glog.V(0).Infof("data file %s, replicaPlacement=%s v=%d size=%d ttl=%s", l.Directory+"/"+name, v.ReplicaPlacement, v.Version(), v.Size(), v.Ttl.String())
} else {
glog.V(0).Infof("new volume %s error %s", name, e)
}
}
}
}
}
}
glog.V(0).Infoln("Store started on dir:", l.Directory, "with", len(l.volumes), "volumes", "max", l.MaxVolumeCount)
}
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func (l *DiskLocation) DeleteCollectionFromDiskLocation(collection string) (e error) {
for k, v := range l.volumes {
if v.Collection == collection {
e = l.deleteVolumeById(k)
if e != nil {
return
}
}
}
return
}
func (l *DiskLocation) deleteVolumeById(vid VolumeId) (e error) {
v, ok := l.volumes[vid]
if !ok {
return
}
e = v.Destroy()
if e != nil {
return
}
delete(l.volumes, vid)
return
}