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genmai + go-sql-proxy

Last updated at Posted at 2015-09-10

genmai で go-sql-proxy つかってクエリーログだしてみた

import (
	"database/sql"
	"database/sql/driver"
	"github.com/go-sql-driver/mysql"
	"github.com/golang/glog"
	"github.com/naoina/genmai"
	"github.com/shogo82148/go-sql-proxy"
)

func SetProxy(driverName string) {
	sql.Register(driverName, proxy.NewProxy(&mysql.MySQLDriver{}, &proxy.Hooks{
		Exec: func(_ interface{}, stmt *proxy.Stmt, args []driver.Value, result driver.Result) error {
			glog.Errorf("Exec: %s; args = %v\n", stmt.QueryString, args)
			return nil
		},
		Query: func(_ interface{}, stmt *proxy.Stmt, args []driver.Value, rows driver.Rows) error {
			glog.Errorf("Query: %s; args = %v\n", stmt.QueryString, args)
			return nil
		},
	}))
}

type TracedMySQLDialect struct {
	genmai.MySQLDialect
}

func (d *TracedMySQLDialect) Name() string {
	return "mysql-tracer"
}

func connectDB(dsn string, trace bool) *genmai.DB {
	var db *genmai.DB
	var dialect genmai.Dialect
	if trace {
		SetProxy("mysql-tracer")
		dialect = &TracedMySQLDialect{}
	} else {
		dialect = &genmai.MySQLDialect{}
	}
	db, err := genmai.New(dialect, dsn)
	if err != nil {
		glog.Fatal(err)
	}
	return db
}

✧\\ g( 'ω' )o //✧

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