66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package goblocks
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import (
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"database/sql"
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"log/slog"
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"sync"
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"time"
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_ "github.com/go-sql-driver/mysql"
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)
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const maxOpenDbConn = 10
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const maxIdleDbConn = 5
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const maxDbLifetime = time.Minute * 5
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var (
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mysqlDBs = make(map[string]*sql.DB)
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mysqlMutex sync.RWMutex
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)
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func (a *App) NewMySQL(name string) (*sql.DB, error) {
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mysqlMutex.Lock()
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defer mysqlMutex.Unlock()
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if db, exists := mysqlDBs[name]; exists {
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return db, nil
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}
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d, err := sql.Open("mysql", a.Datasource(name))
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if err != nil {
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slog.Error("error connecting to database", "error", err, "name", name)
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return nil, err
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}
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d.SetMaxOpenConns(maxOpenDbConn)
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d.SetMaxIdleConns(maxIdleDbConn)
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d.SetConnMaxLifetime(maxDbLifetime)
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if err := d.Ping(); err != nil {
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slog.Error("error pinging database", "error", err, "name", name)
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return nil, err
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}
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mysqlDBs[name] = d
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slog.Info("connected to database", "name", name)
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return d, nil
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}
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func (a *App) GetMySQL(name string) (*sql.DB, bool) {
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mysqlMutex.RLock()
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defer mysqlMutex.RUnlock()
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db, exists := mysqlDBs[name]
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return db, exists
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}
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func (a *App) CloseMySQLDBs() {
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mysqlMutex.Lock()
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defer mysqlMutex.Unlock()
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for name, db := range mysqlDBs {
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db.Close()
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delete(mysqlDBs, name)
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slog.Info("closed database connection", "name", name)
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}
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}
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