feat: implement core backend architecture and project management services for the History API

pkg/mbtiles/db.go

@@ -1,26 +1,40 @@
 package mbtiles
 
 import (
-    "database/sql"
-    "fmt"
+	"database/sql"
+	"fmt"
+	"history-api/pkg/config"
+	"runtime"
 
-    _ "github.com/glebarez/go-sqlite"
+	_ "github.com/glebarez/go-sqlite"
 )
 
 func NewMBTilesDB(path string) (*sql.DB, error) {
-    dsn := fmt.Sprintf("file:%s?mode=ro&_journal_mode=off&_synchronous=off", path)
-    db, err := sql.Open("sqlite", dsn) 
-    if err != nil {
-        return nil, err
-    }
+	dsn := fmt.Sprintf("file:%s?mode=ro&_journal_mode=off&_synchronous=off", path)
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return nil, err
+	}
 
-    err = db.Ping()
-    if err != nil {
-        return nil, err
-    }
+	err = db.Ping()
+	if err != nil {
+		return nil, err
+	}
 
-    db.SetMaxOpenConns(10)
-    db.SetMaxIdleConns(5)
+	maxOpenConns := config.GetIntConfigWithDefault("MBTILES_MAX_OPEN_CONNS", runtime.NumCPU()*4)
+	if maxOpenConns < 1 {
+		maxOpenConns = 1
+	}
+	maxIdleConns := config.GetIntConfigWithDefault("MBTILES_MAX_IDLE_CONNS", maxOpenConns/2)
+	if maxIdleConns < 1 {
+		maxIdleConns = 1
+	}
+	if maxIdleConns > maxOpenConns {
+		maxIdleConns = maxOpenConns
+	}
 
-    return db, nil
-}
+	db.SetMaxOpenConns(maxOpenConns)
+	db.SetMaxIdleConns(maxIdleConns)
+
+	return db, nil
+}