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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlutil
import (
"context"
"database/sql"
"database/sql/driver"
"fmt"
"io"
"os"
"regexp"
"strings"
"time"
"github.com/matrix-org/dendrite/common"
"github.com/ngrok/sqlmw"
"github.com/sirupsen/logrus"
)
var tracingEnabled = os.Getenv("DENDRITE_TRACE_SQL") == "1"
type traceInterceptor struct {
sqlmw.NullInterceptor
}
func (in *traceInterceptor) StmtQueryContext(ctx context.Context, stmt driver.StmtQueryContext, query string, args []driver.NamedValue) (driver.Rows, error) {
startedAt := time.Now()
rows, err := stmt.QueryContext(ctx, args)
logrus.WithField("duration", time.Since(startedAt)).WithField(logrus.ErrorKey, err).Debug("executed sql query ", query, " args: ", args)
return rows, err
}
func (in *traceInterceptor) StmtExecContext(ctx context.Context, stmt driver.StmtExecContext, query string, args []driver.NamedValue) (driver.Result, error) {
startedAt := time.Now()
result, err := stmt.ExecContext(ctx, args)
logrus.WithField("duration", time.Since(startedAt)).WithField(logrus.ErrorKey, err).Debug("executed sql query ", query, " args: ", args)
return result, err
}
func (in *traceInterceptor) RowsNext(c context.Context, rows driver.Rows, dest []driver.Value) error {
err := rows.Next(dest)
if err == io.EOF {
// For all cases, we call Next() n+1 times, the first to populate the initial dest, then eventually
// it will io.EOF. If we log on each Next() call we log the last element twice, so don't.
return err
}
cols := rows.Columns()
logrus.Debug(strings.Join(cols, " | "))
b := strings.Builder{}
for i, val := range dest {
b.WriteString(fmt.Sprintf("%v", val))
if i+1 <= len(dest)-1 {
b.WriteString(" | ")
}
}
logrus.Debug(b.String())
return err
}
// Open opens a database specified by its database driver name and a driver-specific data source name,
// usually consisting of at least a database name and connection information. Includes tracing driver
// if DENDRITE_TRACE_SQL=1
func Open(driverName, dsn string, dbProperties common.DbProperties) (*sql.DB, error) {
if tracingEnabled {
// install the wrapped driver
driverName += "-trace"
}
db, err := sql.Open(driverName, dsn)
if err != nil {
return nil, err
}
if driverName != common.SQLiteDriverName() && dbProperties != nil {
logrus.WithFields(logrus.Fields{
"MaxOpenConns": dbProperties.MaxOpenConns(),
"MaxIdleConns": dbProperties.MaxIdleConns(),
"ConnMaxLifetime": dbProperties.ConnMaxLifetime(),
"dataSourceName": regexp.MustCompile(`://[^@]*@`).ReplaceAllLiteralString(dsn, "://"),
}).Debug("Setting DB connection limits")
db.SetMaxOpenConns(dbProperties.MaxOpenConns())
db.SetMaxIdleConns(dbProperties.MaxIdleConns())
db.SetConnMaxLifetime(dbProperties.ConnMaxLifetime())
}
return db, nil
}
func init() {
registerDrivers()
}
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