func (d *Data) GetKeys(ctx storage.Context) ([]string, error) {
db, err := storage.MutableStore()
if err != nil {
return nil, err
}
// Compute first and last key for range
first := storage.MinTKey(keyStandard)
last := storage.MaxTKey(keyStandard)
keys, err := db.KeysInRange(ctx, first, last)
if err != nil {
return nil, err
}
keyList := []string{}
for _, key := range keys {
keyStr, err := DecodeTKey(key)
if err != nil {
return nil, err
}
keyList = append(keyList, keyStr)
}
return keyList, nil
}
func (db *LevelDB) deleteAllVersions(ctx storage.Context) error {
dvid.StartCgo()
var err error
var minKey, maxKey storage.Key
vctx, versioned := ctx.(storage.VersionedCtx)
if versioned {
// Don't have to worry about tombstones. Delete all keys from all versions for this instance id.
minTKey := storage.MinTKey(storage.TKeyMinClass)
maxTKey := storage.MaxTKey(storage.TKeyMaxClass)
minKey, err = vctx.MinVersionKey(minTKey)
if err != nil {
return err
}
maxKey, err = vctx.MaxVersionKey(maxTKey)
if err != nil {
return err
}
} else {
minKey, maxKey = ctx.KeyRange()
}
const BATCH_SIZE = 10000
batch := db.NewBatch(ctx).(*goBatch)
ro := levigo.NewReadOptions()
it := db.ldb.NewIterator(ro)
defer func() {
it.Close()
dvid.StopCgo()
}()
numKV := 0
it.Seek(minKey)
for {
if err := it.GetError(); err != nil {
return fmt.Errorf("Error iterating during DeleteAll for %s: %v", ctx, err)
}
if it.Valid() {
itKey := it.Key()
storage.StoreKeyBytesRead <- len(itKey)
// Did we pass the final key?
if bytes.Compare(itKey, maxKey) > 0 {
break
}
batch.WriteBatch.Delete(itKey)
if (numKV+1)%BATCH_SIZE == 0 {
if err := batch.Commit(); err != nil {
dvid.Criticalf("Error on batch commit of DeleteAll at key-value pair %d: %v\n", numKV, err)
return fmt.Errorf("Error on batch commit of DeleteAll at key-value pair %d: %v", numKV, err)
}
batch = db.NewBatch(ctx).(*goBatch)
dvid.Debugf("Deleted %d key-value pairs in ongoing DELETE ALL for %s.\n", numKV+1, ctx)
}
numKV++
it.Next()
} else {
break
}
}
if numKV%BATCH_SIZE != 0 {
if err := batch.Commit(); err != nil {
dvid.Criticalf("Error on last batch commit of DeleteAll: %v\n", err)
return fmt.Errorf("Error on last batch commit of DeleteAll: %v", err)
}
}
dvid.Debugf("Deleted %d key-value pairs via DELETE ALL for %s.\n", numKV, ctx)
return nil
}
func (db *LevelDB) deleteSingleVersion(vctx storage.VersionedCtx) error {
dvid.StartCgo()
minTKey := storage.MinTKey(storage.TKeyMinClass)
maxTKey := storage.MaxTKey(storage.TKeyMaxClass)
minKey, err := vctx.MinVersionKey(minTKey)
if err != nil {
return err
}
maxKey, err := vctx.MaxVersionKey(maxTKey)
if err != nil {
return err
}
const BATCH_SIZE = 10000
batch := db.NewBatch(vctx).(*goBatch)
ro := levigo.NewReadOptions()
it := db.ldb.NewIterator(ro)
defer func() {
it.Close()
dvid.StopCgo()
}()
numKV := 0
it.Seek(minKey)
deleteVersion := vctx.VersionID()
for {
if err := it.GetError(); err != nil {
return fmt.Errorf("Error iterating during DeleteAll for %s: %v", vctx, err)
}
if it.Valid() {
itKey := it.Key()
storage.StoreKeyBytesRead <- len(itKey)
// Did we pass the final key?
if bytes.Compare(itKey, maxKey) > 0 {
break
}
_, v, _, err := storage.DataKeyToLocalIDs(itKey)
if err != nil {
return fmt.Errorf("Error on DELETE ALL for version %d: %v", vctx.VersionID(), err)
}
if v == deleteVersion {
batch.WriteBatch.Delete(itKey)
if (numKV+1)%BATCH_SIZE == 0 {
if err := batch.Commit(); err != nil {
dvid.Criticalf("Error on batch commit of DeleteAll at key-value pair %d: %v\n", numKV, err)
return fmt.Errorf("Error on batch commit of DeleteAll at key-value pair %d: %v", numKV, err)
}
batch = db.NewBatch(vctx).(*goBatch)
dvid.Debugf("Deleted %d key-value pairs in ongoing DELETE ALL for %s.\n", numKV+1, vctx)
}
numKV++
}
it.Next()
} else {
break
}
}
if numKV%BATCH_SIZE != 0 {
if err := batch.Commit(); err != nil {
dvid.Criticalf("Error on last batch commit of DeleteAll: %v\n", err)
return fmt.Errorf("Error on last batch commit of DeleteAll: %v", err)
}
}
dvid.Debugf("Deleted %d key-value pairs via DELETE ALL for %s.\n", numKV, vctx)
return nil
}
// Partition returns JSON of differently sized subvolumes that attempt to distribute
// the number of active blocks per subvolume.
func (d *Data) Partition(ctx storage.Context, batchsize int32) ([]byte, error) {
// Partition Z as perfectly as we can.
dz := d.MaxZ - d.MinZ + 1
zleft := dz % batchsize
// Adjust Z range
layerBegZ := d.MinZ
layerEndZ := layerBegZ + batchsize - 1
// Iterate through blocks in ascending Z, calculating active extents and subvolume coverage.
// Keep track of current layer = batchsize of blocks in Z.
var subvolumes subvolumesT
subvolumes.Subvolumes = []subvolumeT{}
subvolumes.ROI.MinChunk[2] = d.MinZ
subvolumes.ROI.MaxChunk[2] = d.MaxZ
layer := d.newLayer(layerBegZ, layerEndZ)
db, err := storage.SmallDataStore()
if err != nil {
return nil, err
}
merge := true
var f storage.ChunkFunc = func(chunk *storage.Chunk) error {
ibytes, err := chunk.K.ClassBytes(keyROI)
if err != nil {
return err
}
index := new(indexRLE)
if err = index.IndexFromBytes(ibytes); err != nil {
return fmt.Errorf("Unable to get indexRLE out of []byte encoding: %v\n", err)
}
// If we are in new layer, process last one.
z := index.start.Value(2)
if z > layerEndZ {
// Process last layer
dvid.Debugf("Computing subvolumes in layer with Z %d -> %d (dz %d)\n",
layer.minZ, layer.maxZ, layer.maxZ-layer.minZ+1)
d.addSubvolumes(layer, &subvolumes, batchsize, merge)
// Init variables for next layer
layerBegZ = layerEndZ + 1
layerEndZ += batchsize
if zleft > 0 {
layerEndZ++
zleft--
}
layer = d.newLayer(layerBegZ, layerEndZ)
}
// Check this block against current layer extents
layer.extend(index)
return nil
}
mintk := storage.MinTKey(keyROI)
maxtk := storage.MaxTKey(keyROI)
err = db.ProcessRange(ctx, mintk, maxtk, &storage.ChunkOp{}, f)
if err != nil {
return nil, err
}
// Process last incomplete layer if there is one.
if len(layer.activeBlocks) > 0 {
dvid.Debugf("Computing subvolumes for final layer Z %d -> %d (dz %d)\n",
layer.minZ, layer.maxZ, layer.maxZ-layer.minZ+1)
d.addSubvolumes(layer, &subvolumes, batchsize, merge)
}
subvolumes.NumSubvolumes = int32(len(subvolumes.Subvolumes))
// Encode as JSON
jsonBytes, err := json.MarshalIndent(subvolumes, "", " ")
if err != nil {
return nil, err
}
return jsonBytes, err
}
func (d *Data) foregroundROI(v dvid.VersionID, dest *roi.Data, background dvid.PointNd) {
dest.Ready = false
store, err := storage.MutableStore()
if err != nil {
dvid.Criticalf("Data type imageblk had error initializing store: %v\n", err)
return
}
timedLog := dvid.NewTimeLog()
timedLog.Infof("Starting foreground ROI %q for %s", dest.DataName(), d.DataName())
// Iterate through all voxel blocks, loading and then checking blocks
// for any foreground voxels.
ctx := datastore.NewVersionedCtx(d, v)
backgroundBytes := make([]byte, len(background))
for i, b := range background {
backgroundBytes[i] = byte(b)
}
const BATCH_SIZE = 1000
var numBatches int
var span *dvid.Span
spans := []dvid.Span{}
var f storage.ChunkFunc = func(chunk *storage.Chunk) error {
if chunk == nil || chunk.V == nil {
return nil
}
data, _, err := dvid.DeserializeData(chunk.V, true)
if err != nil {
return fmt.Errorf("Error decoding block: %v\n", err)
}
numVoxels := d.BlockSize().Prod()
var foreground bool
for i := int64(0); i < numVoxels; i++ {
isBackground := false
for _, b := range backgroundBytes {
if data[i] == b {
isBackground = true
break
}
}
if !isBackground {
foreground = true
break
}
}
if foreground {
indexZYX, err := DecodeTKey(chunk.K)
if err != nil {
return fmt.Errorf("Error decoding voxel block key: %v\n", err)
}
x, y, z := indexZYX.Unpack()
if span == nil {
span = &dvid.Span{z, y, x, x}
} else if !span.Extends(x, y, z) {
spans = append(spans, *span)
if len(spans) >= BATCH_SIZE {
init := (numBatches == 0)
numBatches++
go func(spans []dvid.Span) {
if err := dest.PutSpans(v, spans, init); err != nil {
dvid.Errorf("Error in storing ROI: %v\n", err)
} else {
timedLog.Debugf("-- Wrote batch %d of spans for foreground ROI %q", numBatches, dest.DataName())
}
}(spans)
spans = []dvid.Span{}
}
span = &dvid.Span{z, y, x, x}
}
}
server.BlockOnInteractiveRequests("voxels [compute foreground ROI]")
return nil
}
minTKey := storage.MinTKey(keyImageBlock)
maxTKey := storage.MaxTKey(keyImageBlock)
err = store.ProcessRange(ctx, minTKey, maxTKey, &storage.ChunkOp{}, f)
if err != nil {
dvid.Errorf("Error in processing chunks in ROI: %v\n", err)
return
}
if span != nil {
spans = append(spans, *span)
}
// Save new ROI
if len(spans) > 0 {
if err := dest.PutSpans(v, spans, numBatches == 0); err != nil {
dvid.Errorf("Error in storing ROI: %v\n", err)
return
}
}
timedLog.Infof("Created foreground ROI %q for %s", dest.DataName(), d.DataName())
dest.Ready = true
}
// DeleteAll deletes all key-value associated with a context (data instance and version).
func (db *LevelDB) DeleteAll(ctx storage.Context, allVersions bool) error {
if ctx == nil {
return fmt.Errorf("Received nil context in Delete()")
}
dvid.StartCgo()
// Don't have to worry about tombstones. Delete all keys from all versions for this instance id.
minTKey := storage.MinTKey(storage.TKeyMinClass)
maxTKey := storage.MaxTKey(storage.TKeyMaxClass)
vctx, ok := ctx.(storage.VersionedCtx)
if !ok {
return fmt.Errorf("Non-versioned context passed to DELETE ALL VERSIONS in basholeveldb driver: %v", ctx)
}
minKey, err := vctx.MinVersionKey(minTKey)
if err != nil {
return err
}
maxKey, err := vctx.MaxVersionKey(maxTKey)
if err != nil {
return err
}
const BATCH_SIZE = 10000
batch := db.NewBatch(ctx).(*goBatch)
ro := levigo.NewReadOptions()
it := db.ldb.NewIterator(ro)
defer func() {
it.Close()
dvid.StopCgo()
}()
numKV := 0
it.Seek(minKey)
deleteVersion := ctx.VersionID()
for {
if it.Valid() {
itKey := it.Key()
storage.StoreKeyBytesRead <- len(itKey)
// Did we pass the final key?
if bytes.Compare(itKey, maxKey) > 0 {
break
}
if !allVersions {
_, v, _, err := storage.DataKeyToLocalIDs(itKey)
if err != nil {
return fmt.Errorf("Error on DELETE ALL for version %d: %v", ctx.VersionID(), err)
}
if v != deleteVersion {
it.Next()
continue
}
}
batch.WriteBatch.Delete(itKey)
if (numKV+1)%BATCH_SIZE == 0 {
if err := batch.Commit(); err != nil {
batch.Close()
return fmt.Errorf("Error on DELETE ALL at key-value pair %d: %v", numKV, err)
}
batch = db.NewBatch(ctx).(*goBatch)
}
numKV++
it.Next()
} else {
break
}
}
if numKV%BATCH_SIZE != 0 {
if err := batch.Commit(); err != nil {
batch.Close()
return fmt.Errorf("Error on last batch DELETE: %v\n", err)
}
}
dvid.Debugf("Deleted %d key-value pairs via DELETE ALL for %s.\n", numKV, ctx)
return nil
}