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main.go
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package main
import (
"database/sql"
"flag"
"fmt"
"os"
"time"
"github.com/shiena/ansicolor"
log "github.com/sirupsen/logrus"
nested "github.com/antonfisher/nested-logrus-formatter"
_ "github.com/mattn/go-sqlite3"
"github.com/spf13/viper"
)
// flag
var (
hf bool
cf string
)
func init() {
flag.BoolVar(&hf, "h", false, "this help")
flag.StringVar(&cf, "c", "conf.toml", "set config `file`")
// 改变默认的 Usage,flag包中的Usage 其实是一个函数类型。这里是覆盖默认函数实现,具体见后面Usage部分的分析
flag.Usage = usage
//InitLog 初始化日志
log.SetFormatter(&nested.Formatter{
HideKeys: true,
ShowFullLevel: true,
TimestampFormat: "2006-01-02 15:04:05.000",
// FieldsOrder: []string{"component", "category"},
})
// then wrap the log output with it
log.SetOutput(ansicolor.NewAnsiColorWriter(os.Stdout))
log.SetLevel(log.DebugLevel)
}
func usage() {
fmt.Fprintf(os.Stderr, `tiler version: tiler/v0.1.0
Usage: tiler [-h] [-c filename]
`)
flag.PrintDefaults()
}
// initConf 初始化配置
func initConf(cfgFile string) {
if _, err := os.Stat(cfgFile); os.IsNotExist(err) {
log.Warnf("config file(%s) not exist", cfgFile)
}
viper.SetConfigType("toml")
viper.SetConfigFile(cfgFile)
viper.AutomaticEnv() // read in environment variables that match
err := viper.ReadInConfig()
if err != nil {
log.Warnf("read config file(%s) error, details: %s", viper.ConfigFileUsed(), err)
}
viper.SetDefault("app.version", "v 0.1.0")
viper.SetDefault("app.title", "MapCloud Tiler")
viper.SetDefault("output.format", "mbtiles")
viper.SetDefault("output.directory", "output")
viper.SetDefault("task.workers", 4)
viper.SetDefault("task.savepipe", 1)
viper.SetDefault("task.timedelay", 0)
}
type TileData struct {
Z int
X int
Y int
Flag bool
}
// 插入瓦片数据
func insertTiles(db *sql.Tx, tiles []TileData) error {
// 准备插入语句
stmt, err := db.Prepare("INSERT INTO tiles (z, x, y,flag) VALUES (?, ?, ?, ?)")
if err != nil {
return err
}
defer stmt.Close()
// 执行插入
for _, tile := range tiles {
_, err = stmt.Exec(tile.Z, tile.X, tile.Y, tile.Flag)
if err != nil {
return err
}
}
return nil
}
func testDbTask() {
db, err := sql.Open("sqlite3", "./tiles.db")
if err != nil {
log.Fatal(err)
}
defer db.Close()
createTableSQL := `CREATE TABLE IF NOT EXISTS tiles (
id INTEGER PRIMARY KEY AUTOINCREMENT,
z INTEGER,
x INTEGER,
y INTEGER,
flag BOOLEAN
);`
_, err = db.Exec(createTableSQL)
if err != nil {
log.Fatal(err)
}
// 开始事务
tx, err := db.Begin()
if err != nil {
log.Fatal(err)
}
defer tx.Rollback() // 如果提交事务前发生错误,则回滚事务
batchSize := 1 << 10
// 插入数据
tileBatch := make([]TileData, 0, batchSize)
total := 0
i := 0
for z := 0; z <= 12; z++ {
numTiles := 1 << uint(z) // 计算每个缩放级别的瓦片数量
total += numTiles * numTiles
log.Printf("级别%d,瓦片数量:%d\n", z, numTiles*numTiles)
log.Printf("总瓦片数量:%d\n", total)
for x := 0; x < numTiles; x++ {
for y := 0; y < numTiles; y++ {
tile := TileData{Z: z, X: x, Y: y, Flag: false}
tileBatch = append(tileBatch, tile)
// 批量插入
if len(tileBatch) >= batchSize {
err := insertTiles(tx, tileBatch) // 使用事务执行批量插入操作
if err != nil {
log.Fatal(err)
}
tileBatch = nil // 清空批次
}
i++
if i > 99999999 {
goto last
}
}
}
}
last:
// 处理剩余的批次
if len(tileBatch) > 0 {
err := insertTiles(tx, tileBatch) // 使用事务执行批量插入操作
if err != nil {
log.Fatal(err)
}
}
// 提交事务
err = tx.Commit()
if err != nil {
log.Fatal(err)
}
}
func main() {
flag.Parse()
if hf {
flag.Usage()
return
}
if cf == "" {
cf = "conf.toml"
}
initConf(cf)
start := time.Now()
tm := TileMap{
Name: viper.GetString("tm.name"),
Min: viper.GetInt("tm.min"),
Max: viper.GetInt("tm.max"),
Format: viper.GetString("tm.format"),
Schema: viper.GetString("tm.schema"),
JSON: viper.GetString("tm.json"),
URL: viper.GetString("tm.url"),
}
type cfgLayer struct {
Min int
Max int
Geojson string
URL string
}
var cfgLrs []cfgLayer
err := viper.UnmarshalKey("lrs", &cfgLrs)
if err != nil {
log.Fatal("lrs配置错误")
}
var layers []Layer
for _, lrs := range cfgLrs {
for z := lrs.Min; z <= lrs.Max; z++ {
c := loadCollection(lrs.Geojson)
layer := Layer{
URL: lrs.URL,
Zoom: z,
Collection: c,
}
layers = append(layers, layer)
}
}
task := NewTask(layers, tm)
fmt.Println(task.workerCount)
task.Download()
secs := time.Since(start).Seconds()
log.Printf("\n%.3fs finished...", secs)
}