replace github.com/siddontang/go-log with log/slog (#993)

* replace github.com/siddontang/go-log with log/slog

* feedback

Co-authored-by: Daniël van Eeden <github@myname.nl>

* avoid fmt.Sprintf logging

* go-mysqlbinlog: allow configuring logger

* feedback

* lance feedback

Co-authored-by: lance6716 <lance6716@gmail.com>

---------

Co-authored-by: Daniël van Eeden <github@myname.nl>
Co-authored-by: lance6716 <lance6716@gmail.com>

Author: 3 people

README.md

@@ -147,7 +147,6 @@ package main
 
 import (
 	"github.com/go-mysql-org/go-mysql/canal"
-	"github.com/siddontang/go-log/log"
 )
 
 type MyEventHandler struct {
@@ -491,27 +490,10 @@ We pass all tests in https://github.com/bradfitz/go-sql-test using go-mysql driv
 
 ## Logging
 
-Logging by default is send to stdout.
-
-To disable logging completely:
-```go
-import "github.com/siddontang/go-log/log"
-...
-        nullHandler, _ := log.NewNullHandler()
-        cfg.Logger = log.NewDefault(nullHandler)
-```
-
-To write logging to any [`io.Writer`](https://pkg.go.dev/io#Writer):
-```go
-import "github.com/siddontang/go-log/log"
-...
-        w := ...
-        streamHandler, _ := log.NewStreamHandler(w)
-        cfg.Logger = log.NewDefault(streamHandler)
-```
-
-Or you can implement your own [`log.Handler`](https://pkg.go.dev/github.com/siddontang/go-log/log#Handler).
+Logging uses [log/slog](https://pkg.go.dev/log/slog) and by default is sent to standard out.
 
+For the old logging package `github.com/siddontang/go-log/log`, a converting package 
+`https://github.com/serprex/slog-siddontang` is available.
 ## How to migrate to this repo
 To change the used package in your repo it's enough to add this `replace` directive to your `go.mod`:
 ```

canal/canal.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"log/slog"
 	"net"
 	"os"
 	"regexp"
@@ -21,7 +22,6 @@ import (
 	"github.com/go-mysql-org/go-mysql/utils"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/pkg/parser"
-	"github.com/siddontang/go-log/log"
 )
 
 // Canal can sync your MySQL data into everywhere, like Elasticsearch, Redis, etc...
@@ -66,8 +66,7 @@ var (
 func NewCanal(cfg *Config) (*Canal, error) {
 	c := new(Canal)
 	if cfg.Logger == nil {
-		streamHandler, _ := log.NewStreamHandler(os.Stdout)
-		cfg.Logger = log.NewDefault(streamHandler)
+		cfg.Logger = slog.Default()
 	}
 	if cfg.Dialer == nil {
 		dialer := &net.Dialer{}
@@ -243,14 +242,14 @@ func (c *Canal) run() error {
 		close(c.dumpDoneCh)
 
 		if err != nil {
-			c.cfg.Logger.Errorf("canal dump mysql err: %v", err)
+			c.cfg.Logger.Error("canal dump mysql err", slog.Any("error", err))
 			return errors.Trace(err)
 		}
 	}
 
 	if err := c.runSyncBinlog(); err != nil {
 		if errors.Cause(err) != context.Canceled {
-			c.cfg.Logger.Errorf("canal start sync binlog err: %v", err)
+			c.cfg.Logger.Error("canal start sync binlog err", slog.Any("error", err))
 			return errors.Trace(err)
 		}
 	}
@@ -259,7 +258,7 @@ func (c *Canal) run() error {
 }
 
 func (c *Canal) Close() {
-	c.cfg.Logger.Infof("closing canal")
+	c.cfg.Logger.Info("closing canal")
 	c.m.Lock()
 	defer c.m.Unlock()
 
@@ -379,7 +378,7 @@ func (c *Canal) GetTable(db string, table string) (*schema.Table, error) {
 			c.errorTablesGetTime[key] = utils.Now()
 			c.tableLock.Unlock()
 			// log error and return ErrMissingTableMeta
-			c.cfg.Logger.Errorf("canal get table meta err: %v", errors.Trace(err))
+			c.cfg.Logger.Error("canal get table meta err", slog.Any("error", errors.Trace(err)))
 			return nil, schema.ErrMissingTableMeta
 		}
 		return nil, err

canal/canal_test.go

@@ -6,7 +6,6 @@ import (
 	"time"
 
 	"github.com/pingcap/tidb/pkg/parser"
-	"github.com/siddontang/go-log/log"
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 
@@ -99,7 +98,7 @@ func (s *canalTestSuite) SetupSuite() {
 
 	s.execute("SET GLOBAL binlog_format = 'ROW'")
 
-	s.c.SetEventHandler(&testEventHandler{})
+	s.c.SetEventHandler(&testEventHandler{T: s.T()})
 	go func() {
 		set, _ := mysql.ParseGTIDSet("mysql", "")
 		err = s.c.StartFromGTID(set)
@@ -126,10 +125,11 @@ func (s *canalTestSuite) execute(query string, args ...interface{}) *mysql.Resul
 
 type testEventHandler struct {
 	DummyEventHandler
+	T *testing.T
 }
 
 func (h *testEventHandler) OnRow(e *RowsEvent) error {
-	log.Infof("OnRow %s %v\n", e.Action, e.Rows)
+	h.T.Log("OnRow", e.Action, e.Rows)
 	umi, ok := e.Rows[0][4].(uint32) // 4th col is umi. mysqldump gives uint64 instead of uint32
 	if ok && (umi != umiA && umi != umiB && umi != umiC) {
 		return fmt.Errorf("invalid unsigned medium int %d", umi)

canal/config.go

@@ -2,15 +2,14 @@ package canal
 
 import (
 	"crypto/tls"
+	"log/slog"
 	"math/rand"
 	"net"
 	"os"
 	"time"
 
 	"github.com/BurntSushi/toml"
 	"github.com/pingcap/errors"
-	"github.com/siddontang/go-log/log"
-	"github.com/siddontang/go-log/loggers"
 
 	"github.com/go-mysql-org/go-mysql/client"
 	"github.com/go-mysql-org/go-mysql/mysql"
@@ -101,7 +100,7 @@ type Config struct {
 	TLSConfig *tls.Config
 
 	// Set Logger
-	Logger loggers.Advanced
+	Logger *slog.Logger
 
 	// Set Dialer
 	Dialer client.Dialer
@@ -150,8 +149,7 @@ func NewDefaultConfig() *Config {
 	c.Dump.DiscardErr = true
 	c.Dump.SkipMasterData = false
 
-	streamHandler, _ := log.NewStreamHandler(os.Stdout)
-	c.Logger = log.NewDefault(streamHandler)
+	c.Logger = slog.Default()
 
 	dialer := &net.Dialer{}
 	c.Dialer = dialer.DialContext

canal/dump.go

@@ -3,6 +3,7 @@ package canal
 import (
 	"encoding/hex"
 	"fmt"
+	"log/slog"
 	"strconv"
 	"strings"
 	"time"
@@ -49,7 +50,7 @@ func (h *dumpParseHandler) Data(db string, table string, values []string) error
 			e == schema.ErrMissingTableMeta {
 			return nil
 		}
-		h.c.cfg.Logger.Errorf("get %s.%s information err: %v", db, table, err)
+		h.c.cfg.Logger.Error("error getting table information", slog.String("database", db), slog.String("table", table), slog.Any("error", err))
 		return errors.Trace(err)
 	}
 
@@ -163,7 +164,7 @@ func (c *Canal) dump() error {
 		if err != nil {
 			return errors.Trace(err)
 		}
-		c.cfg.Logger.Infof("skip master data, get current binlog position %v", pos)
+		c.cfg.Logger.Info("skip master data, get current binlog position", slog.Any("position", pos))
 		h.name = pos.Name
 		h.pos = uint64(pos.Pos)
 	}
@@ -185,8 +186,7 @@ func (c *Canal) dump() error {
 		c.master.UpdateGTIDSet(h.gset)
 		startPos = h.gset
 	}
-	c.cfg.Logger.Infof("dump MySQL and parse OK, use %0.2f seconds, start binlog replication at %s",
-		time.Since(start).Seconds(), startPos)
+	c.cfg.Logger.Info("dump MySQL and parse OK", slog.Duration("use", time.Since(start)), slog.String("position", startPos.String()))
 	return nil
 }
 
@@ -196,7 +196,7 @@ func (c *Canal) tryDump() error {
 	if (len(pos.Name) > 0 && pos.Pos > 0) ||
 		(gset != nil && gset.String() != "") {
 		// we will sync with binlog name and position
-		c.cfg.Logger.Infof("skip dump, use last binlog replication pos %s or GTID set %v", pos, gset)
+		c.cfg.Logger.Info("skip dump, use last binlog replication position or GTID set", slog.String("file", pos.Name), slog.Uint64("position", uint64(pos.Pos)), slog.Any("GTID set", gset))
 		return nil
 	}
 

canal/master.go

@@ -1,10 +1,10 @@
 package canal
 
 import (
+	"log/slog"
 	"sync"
 
 	"github.com/go-mysql-org/go-mysql/mysql"
-	"github.com/siddontang/go-log/loggers"
 )
 
 type masterInfo struct {
@@ -16,27 +16,27 @@ type masterInfo struct {
 
 	timestamp uint32
 
-	logger loggers.Advanced
+	logger *slog.Logger
 }
 
 func (m *masterInfo) Update(pos mysql.Position) {
-	m.logger.Debugf("update master position %s", pos)
+	m.logger.Debug("update master position", slog.Any("pos", pos))
 
 	m.Lock()
 	m.pos = pos
 	m.Unlock()
 }
 
 func (m *masterInfo) UpdateTimestamp(ts uint32) {
-	m.logger.Debugf("update master timestamp %d", ts)
+	m.logger.Debug("update master timestamp", slog.Int64("ts", int64(ts)))
 
 	m.Lock()
 	m.timestamp = ts
 	m.Unlock()
 }
 
 func (m *masterInfo) UpdateGTIDSet(gset mysql.GTIDSet) {
-	m.logger.Debugf("update master gtid set %s", gset)
+	m.logger.Debug("update master gtid set", slog.Any("gset", gset))
 
 	m.Lock()
 	m.gset = gset

canal/sync.go

@@ -1,6 +1,7 @@
 package canal
 
 import (
+	"log/slog"
 	"sync/atomic"
 	"time"
 
@@ -20,15 +21,15 @@ func (c *Canal) startSyncer() (*replication.BinlogStreamer, error) {
 		if err != nil {
 			return nil, errors.Errorf("start sync replication at binlog %v error %v", pos, err)
 		}
-		c.cfg.Logger.Infof("start sync binlog at binlog file %v", pos)
+		c.cfg.Logger.Info("start sync binlog at binlog file", slog.Any("pos", pos))
 		return s, nil
 	} else {
 		gsetClone := gset.Clone()
 		s, err := c.syncer.StartSyncGTID(gset)
 		if err != nil {
 			return nil, errors.Errorf("start sync replication at GTID set %v error %v", gset, err)
 		}
-		c.cfg.Logger.Infof("start sync binlog at GTID set %v", gsetClone)
+		c.cfg.Logger.Info("start sync binlog at GTID set", slog.Any("gset", gsetClone))
 		return s, nil
 	}
 }
@@ -57,7 +58,7 @@ func (c *Canal) runSyncBinlog() error {
 			// and https://github.com/mysql/mysql-server/blob/8cc757da3d87bf4a1f07dcfb2d3c96fed3806870/sql/rpl_binlog_sender.cc#L899
 			if ev.Header.Timestamp == 0 {
 				fakeRotateLogName := string(e.NextLogName)
-				c.cfg.Logger.Infof("received fake rotate event, next log name is %s", e.NextLogName)
+				c.cfg.Logger.Info("received fake rotate event", slog.String("nextLogName", string(e.NextLogName)))
 
 				if fakeRotateLogName != c.master.Position().Name {
 					c.cfg.Logger.Info("log name changed, the fake rotate event will be handled as a real rotate event")
@@ -93,17 +94,16 @@ func (c *Canal) handleEvent(ev *replication.BinlogEvent) error {
 	case *replication.RotateEvent:
 		pos.Name = string(e.NextLogName)
 		pos.Pos = uint32(e.Position)
-		c.cfg.Logger.Infof("rotate binlog to %s", pos)
+		c.cfg.Logger.Info("rotate binlog", slog.Any("pos", pos))
 		savePos = true
 		force = true
 		if err = c.eventHandler.OnRotate(ev.Header, e); err != nil {
 			return errors.Trace(err)
 		}
 	case *replication.RowsEvent:
 		// we only focus row based event
-		err = c.handleRowsEvent(ev)
-		if err != nil {
-			c.cfg.Logger.Errorf("handle rows event at (%s, %d) error %v", pos.Name, curPos, err)
+		if err := c.handleRowsEvent(ev); err != nil {
+			c.cfg.Logger.Error("handle rows event", slog.String("file", pos.Name), slog.Uint64("position", uint64(curPos)), slog.Any("error", err))
 			return errors.Trace(err)
 		}
 		return nil
@@ -113,7 +113,7 @@ func (c *Canal) handleEvent(ev *replication.BinlogEvent) error {
 		for _, subEvent := range ev.Events {
 			err = c.handleEvent(subEvent)
 			if err != nil {
-				c.cfg.Logger.Errorf("handle transaction payload subevent at (%s, %d) error %v", pos.Name, curPos, err)
+				c.cfg.Logger.Error("handle transaction payload subevent", slog.String("file", pos.Name), slog.Uint64("position", uint64(curPos)), slog.Any("error", err))
 				return errors.Trace(err)
 			}
 		}
@@ -144,7 +144,7 @@ func (c *Canal) handleEvent(ev *replication.BinlogEvent) error {
 		if err != nil {
 			// The parser does not understand all syntax.
 			// For example, it won't parse [CREATE|DROP] TRIGGER statements.
-			c.cfg.Logger.Errorf("parse query(%s) err %v, will skip this event", e.Query, err)
+			c.cfg.Logger.Error("error parsing query, will skip this event", slog.String("query", string(e.Query)), slog.Any("error", err))
 			return nil
 		}
 		if len(stmts) > 0 {
@@ -246,7 +246,7 @@ func parseStmt(stmt ast.StmtNode) (ns []*node) {
 
 func (c *Canal) updateTable(header *replication.EventHeader, db, table string) (err error) {
 	c.ClearTableCache([]byte(db), []byte(table))
-	c.cfg.Logger.Infof("table structure changed, clear table cache: %s.%s\n", db, table)
+	c.cfg.Logger.Info("table structure changed, clear table cache", slog.String("database", db), slog.String("table", table))
 	if err = c.eventHandler.OnTableChanged(header, db, table); err != nil && errors.Cause(err) != schema.ErrTableNotExist {
 		return errors.Trace(err)
 	}
@@ -316,7 +316,8 @@ func (c *Canal) WaitUntilPos(pos mysql.Position, timeout time.Duration) error {
 			if curPos.Compare(pos) >= 0 {
 				return nil
 			} else {
-				c.cfg.Logger.Debugf("master pos is %v, wait catching %v", curPos, pos)
+				c.cfg.Logger.Debug("master pos is behind, wait to catch up", slog.String("master file", curPos.Name), slog.Uint64("master position", uint64(curPos.Pos)),
+					slog.String("target file", pos.Name), slog.Uint64("target position", uint64(curPos.Pos)))
 				time.Sleep(100 * time.Millisecond)
 			}
 		}