86 lines
1.5 KiB
Go
86 lines
1.5 KiB
Go
package tiledb
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import (
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"fmt"
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"mapserver/coords"
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"github.com/dgraph-io/badger"
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"github.com/prometheus/client_golang/prometheus"
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)
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func New(path string) (*TileDB, error) {
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opts := badger.DefaultOptions
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opts.Dir = path
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opts.ValueDir = path
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db, err := badger.Open(opts)
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if err != nil {
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return nil, err
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}
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return &TileDB{
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db: db,
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}, nil
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}
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type TileDB struct {
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db *badger.DB
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}
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func getKey(pos *coords.TileCoords) []byte {
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return []byte(fmt.Sprintf("%d/%d/%d/%d", pos.X, pos.Y, pos.Zoom, pos.LayerId))
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}
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func (this *TileDB) GC() {
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for {
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err := this.db.RunValueLogGC(0.25)
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if err != nil {
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return
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}
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}
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}
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func (this *TileDB) GetTile(pos *coords.TileCoords) ([]byte, error) {
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timer := prometheus.NewTimer(getDuration)
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defer timer.ObserveDuration()
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var tile []byte
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err := this.db.View(func(txn *badger.Txn) error {
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item, err := txn.Get(getKey(pos))
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if item != nil {
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tile, err = item.ValueCopy(nil)
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}
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return err
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})
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if err != nil {
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return nil, nil
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}
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return tile, err
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}
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func (this *TileDB) SetTile(pos *coords.TileCoords, tile []byte) error {
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timer := prometheus.NewTimer(setDuration)
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defer timer.ObserveDuration()
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err := this.db.Update(func(txn *badger.Txn) error {
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err := txn.Set(getKey(pos), tile)
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return err
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})
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return err
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}
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func (this *TileDB) RemoveTile(pos *coords.TileCoords) error {
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timer := prometheus.NewTimer(removeDuration)
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defer timer.ObserveDuration()
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err := this.db.Update(func(txn *badger.Txn) error {
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err := txn.Delete(getKey(pos))
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return err
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})
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return err
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}
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