forked from MTSR/mapserver
150 lines
2.7 KiB
Go
150 lines
2.7 KiB
Go
package postgres
|
|
|
|
import (
|
|
"database/sql"
|
|
"mapserver/coords"
|
|
"mapserver/db"
|
|
"mapserver/vfs"
|
|
"time"
|
|
|
|
_ "github.com/lib/pq"
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
type PostgresAccessor struct {
|
|
db *sql.DB
|
|
}
|
|
|
|
func (db *PostgresAccessor) Migrate() error {
|
|
hasMtime := true
|
|
_, err := db.db.Query("select max(mtime) from blocks")
|
|
if err != nil {
|
|
hasMtime = false
|
|
}
|
|
|
|
if !hasMtime {
|
|
log.Info("Migrating database")
|
|
start := time.Now()
|
|
_, err = db.db.Exec(vfs.FSMustString(false, "/sql/postgres_mapdb_migrate.sql"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
t := time.Now()
|
|
elapsed := t.Sub(start)
|
|
log.WithFields(logrus.Fields{"elapsed": elapsed}).Info("Migration completed")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func convertRows(posx, posy, posz int, data []byte, mtime int64) *db.Block {
|
|
c := coords.NewMapBlockCoords(posx, posy, posz)
|
|
return &db.Block{Pos: c, Data: data, Mtime: mtime}
|
|
}
|
|
|
|
func (this *PostgresAccessor) FindBlocksByMtime(gtmtime int64, limit int) ([]*db.Block, error) {
|
|
blocks := make([]*db.Block, 0)
|
|
|
|
rows, err := this.db.Query(getBlocksByMtimeQuery, gtmtime, limit)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
for rows.Next() {
|
|
var posx, posy, posz int
|
|
var data []byte
|
|
var mtime int64
|
|
|
|
err = rows.Scan(&posx, &posy, &posz, &data, &mtime)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mb := convertRows(posx, posy, posz, data, mtime)
|
|
blocks = append(blocks, mb)
|
|
}
|
|
|
|
return blocks, nil
|
|
}
|
|
|
|
func (this *PostgresAccessor) CountBlocks(frommtime, tomtime int64) (int, error) {
|
|
rows, err := this.db.Query(countBlocksQuery, frommtime, tomtime)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
if rows.Next() {
|
|
var count int64
|
|
|
|
err = rows.Scan(&count)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return int(count), nil
|
|
}
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
func (db *PostgresAccessor) GetTimestamp() (int64, error) {
|
|
rows, err := db.db.Query(getTimestampQuery)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
if rows.Next() {
|
|
var ts float64
|
|
|
|
err = rows.Scan(&ts)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return int64(ts), nil
|
|
}
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
func (this *PostgresAccessor) GetBlock(pos *coords.MapBlockCoords) (*db.Block, error) {
|
|
rows, err := this.db.Query(getBlockQuery, pos.X, pos.Y, pos.Z)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
if rows.Next() {
|
|
var posx, posy, posz int
|
|
var data []byte
|
|
var mtime int64
|
|
|
|
err = rows.Scan(&posx, &posy, &posz, &data, &mtime)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mb := convertRows(posx, posy, posz, data, mtime)
|
|
return mb, nil
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func New(connStr string) (*PostgresAccessor, error) {
|
|
db, err := sql.Open("postgres", connStr+" sslmode=disable")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sq := &PostgresAccessor{db: db}
|
|
return sq, nil
|
|
}
|