refactor: Manage all redis client into context.Context

cmd/redis-shake/main.go

@@ -28,6 +28,9 @@ func main() {
 	utils.SetPprofPort()
 	luaRuntime := function.New(config.Opt.Function)
 
+  ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
 	// create reader
 	var theReader reader.Reader
 	if v.IsSet("sync_reader") {
@@ -38,10 +41,10 @@ func main() {
 			log.Panicf("failed to read the SyncReader config entry. err: %v", err)
 		}
 		if opts.Cluster {
-			theReader = reader.NewSyncClusterReader(opts)
+			theReader = reader.NewSyncClusterReader(ctx, opts)
 			log.Infof("create SyncClusterReader: %v", opts.Address)
 		} else {
-			theReader = reader.NewSyncStandaloneReader(opts)
+			theReader = reader.NewSyncStandaloneReader(ctx, opts)
 			log.Infof("create SyncStandaloneReader: %v", opts.Address)
 		}
 	} else if v.IsSet("scan_reader") {
@@ -52,10 +55,10 @@ func main() {
 			log.Panicf("failed to read the ScanReader config entry. err: %v", err)
 		}
 		if opts.Cluster {
-			theReader = reader.NewScanClusterReader(opts)
+			theReader = reader.NewScanClusterReader(ctx, opts)
 			log.Infof("create ScanClusterReader: %v", opts.Address)
 		} else {
-			theReader = reader.NewScanStandaloneReader(opts)
+			theReader = reader.NewScanStandaloneReader(ctx, opts)
 			log.Infof("create ScanStandaloneReader: %v", opts.Address)
 		}
 	} else if v.IsSet("rdb_reader") {
@@ -93,10 +96,10 @@ func main() {
 			log.Panicf("the RDBRestoreCommandBehavior can't be 'panic' when the server not reply to commands")
 		}
 		if opts.Cluster {
-			theWriter = writer.NewRedisClusterWriter(opts)
+			theWriter = writer.NewRedisClusterWriter(ctx, opts)
 			log.Infof("create RedisClusterWriter: %v", opts.Address)
 		} else {
-			theWriter = writer.NewRedisStandaloneWriter(opts)
+			theWriter = writer.NewRedisStandaloneWriter(ctx, opts)
 			log.Infof("create RedisStandaloneWriter: %v", opts.Address)
 		}
 		if config.Opt.Advanced.EmptyDBBeforeSync {
@@ -114,7 +117,6 @@ func main() {
 
 	log.Infof("start syncing...")
 
-	ctx, cancel := context.WithCancel(context.Background())
 	ch := theReader.StartRead(ctx)
 	go waitShutdown(cancel)
 

internal/client/redis.go

@@ -2,6 +2,7 @@ package client
 
 import (
 	"bufio"
+	"context"
 	"crypto/tls"
 	"net"
 	"strconv"
@@ -19,16 +20,22 @@ type Redis struct {
 	protoWriter *proto.Writer
 }
 
-func NewRedisClient(address string, username string, password string, Tls bool) *Redis {
+func NewRedisClient(ctx context.Context, address string, username string, password string, Tls bool) *Redis {
 	r := new(Redis)
 	var conn net.Conn
-	var dialer net.Dialer
+	var dialer = &net.Dialer{
+		Timeout:   5 * time.Minute,
+		KeepAlive: 5 * time.Minute,
+	}
 	var err error
-	dialer.Timeout = 3 * time.Second
 	if Tls {
-		conn, err = tls.DialWithDialer(&dialer, "tcp", address, &tls.Config{InsecureSkipVerify: true})
+		tlsDialer := &tls.Dialer{
+			NetDialer: dialer,
+			Config:    &tls.Config{InsecureSkipVerify: true},
+		}
+		conn, err = tlsDialer.DialContext(ctx, "tcp", address)
 	} else {
-		conn, err = dialer.Dial("tcp", address)
+		conn, err = dialer.DialContext(ctx, "tcp", address)
 	}
 	if err != nil {
 		log.Panicf("dial failed. address=[%s], tls=[%v], err=[%v]", address, Tls, err)

internal/reader/scan_cluster_reader.go

@@ -14,14 +14,14 @@ type scanClusterReader struct {
 	statusId int
 }
 
-func NewScanClusterReader(opts *ScanReaderOptions) Reader {
-	addresses, _ := utils.GetRedisClusterNodes(opts.Address, opts.Username, opts.Password, opts.Tls, opts.PreferReplica)
+func NewScanClusterReader(ctx context.Context, opts *ScanReaderOptions) Reader {
+	addresses, _ := utils.GetRedisClusterNodes(ctx, opts.Address, opts.Username, opts.Password, opts.Tls, opts.PreferReplica)
 
 	rd := &scanClusterReader{}
 	for _, address := range addresses {
 		theOpts := *opts
 		theOpts.Address = address
-		rd.readers = append(rd.readers, NewScanStandaloneReader(&theOpts))
+		rd.readers = append(rd.readers, NewScanStandaloneReader(ctx, &theOpts))
 	}
 	return rd
 }

internal/reader/scan_standalone_reader.go

@@ -50,10 +50,10 @@ type scanStandaloneReader struct {
 	}
 }
 
-func NewScanStandaloneReader(opts *ScanReaderOptions) Reader {
+func NewScanStandaloneReader(ctx context.Context, opts *ScanReaderOptions) Reader {
 	r := new(scanStandaloneReader)
 	// dbs
-	c := client.NewRedisClient(opts.Address, opts.Username, opts.Password, opts.Tls)
+	c := client.NewRedisClient(ctx, opts.Address, opts.Username, opts.Password, opts.Tls)
 	if c.IsCluster() { // not use opts.Cluster, because user may use standalone mode to scan a cluster node
 		r.dbs = []int{0}
 	} else {
@@ -82,7 +82,7 @@ func (r *scanStandaloneReader) subscript() {
 	if !r.opts.KSN {
 		return
 	}
-	c := client.NewRedisClient(r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
+	c := client.NewRedisClient(r.ctx, r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
 	c.Send("psubscribe", "__keyevent@*__:*")
 
 	go func() {
@@ -114,7 +114,7 @@ func (r *scanStandaloneReader) subscript() {
 }
 
 func (r *scanStandaloneReader) scan() {
-	c := client.NewRedisClient(r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
+	c := client.NewRedisClient(r.ctx, r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
 	defer c.Close()
 	for _, dbId := range r.dbs {
 		if dbId != 0 {
@@ -150,7 +150,7 @@ func (r *scanStandaloneReader) scan() {
 
 func (r *scanStandaloneReader) fetch() {
 	nowDbId := 0
-	c := client.NewRedisClient(r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
+	c := client.NewRedisClient(r.ctx, r.opts.Address, r.opts.Username, r.opts.Password, r.opts.Tls)
 	defer c.Close()
 	for item := range r.keyQueue.Ch {
 		r.stat.NeedUpdateCount = int64(r.keyQueue.Len())

internal/reader/sync_cluster_reader.go

@@ -15,8 +15,8 @@ type syncClusterReader struct {
 	statusId int
 }
 
-func NewSyncClusterReader(opts *SyncReaderOptions) Reader {
-	addresses, _ := utils.GetRedisClusterNodes(opts.Address, opts.Username, opts.Password, opts.Tls, opts.PreferReplica)
+func NewSyncClusterReader(ctx context.Context, opts *SyncReaderOptions) Reader {
+	addresses, _ := utils.GetRedisClusterNodes(ctx, opts.Address, opts.Username, opts.Password, opts.Tls, opts.PreferReplica)
 	log.Debugf("get redis cluster nodes:")
 	for _, address := range addresses {
 		log.Debugf("%s", address)
@@ -25,7 +25,7 @@ func NewSyncClusterReader(opts *SyncReaderOptions) Reader {
 	for _, address := range addresses {
 		theOpts := *opts
 		theOpts.Address = address
-		rd.readers = append(rd.readers, NewSyncStandaloneReader(&theOpts))
+		rd.readers = append(rd.readers, NewSyncStandaloneReader(ctx, &theOpts))
 	}
 	return rd
 }

internal/reader/sync_standalone_reader.go

@@ -1,8 +1,8 @@
 package reader
 
 import (
-	"context"
 	"bufio"
+	"context"
 	"fmt"
 	"io"
 	"os"
@@ -77,10 +77,10 @@ type syncStandaloneReader struct {
 	}
 }
 
-func NewSyncStandaloneReader(opts *SyncReaderOptions) Reader {
+func NewSyncStandaloneReader(ctx context.Context, opts *SyncReaderOptions) Reader {
 	r := new(syncStandaloneReader)
 	r.opts = opts
-	r.client = client.NewRedisClient(opts.Address, opts.Username, opts.Password, opts.Tls)
+	r.client = client.NewRedisClient(ctx, opts.Address, opts.Username, opts.Password, opts.Tls)
 	r.rd = r.client.BufioReader()
 	r.stat.Name = "reader_" + strings.Replace(opts.Address, ":", "_", -1)
 	r.stat.Address = opts.Address

internal/utils/cluster_nodes.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"context"
 	"fmt"
 	"strconv"
 	"strings"
@@ -9,8 +10,8 @@ import (
 	"RedisShake/internal/log"
 )
 
-func GetRedisClusterNodes(address string, username string, password string, Tls bool, perferReplica bool) (addresses []string, slots [][]int) {
-	c := client.NewRedisClient(address, username, password, Tls)
+func GetRedisClusterNodes(ctx context.Context, address string, username string, password string, Tls bool, perferReplica bool) (addresses []string, slots [][]int) {
+	c := client.NewRedisClient(ctx, address, username, password, Tls)
 	reply := c.DoWithStringReply("cluster", "nodes")
 	reply = strings.TrimSpace(reply)
 	slotsCount := 0

internal/writer/redis_cluster_writer.go

@@ -1,6 +1,8 @@
 package writer
 
 import (
+	"context"
+
 	"RedisShake/internal/entry"
 	"RedisShake/internal/log"
 	"RedisShake/internal/utils"
@@ -16,9 +18,9 @@ type RedisClusterWriter struct {
 	stat []interface{}
 }
 
-func NewRedisClusterWriter(opts *RedisWriterOptions) Writer {
+func NewRedisClusterWriter(ctx context.Context, opts *RedisWriterOptions) Writer {
 	rw := new(RedisClusterWriter)
-	rw.loadClusterNodes(opts)
+	rw.loadClusterNodes(ctx, opts)
 	log.Infof("redisClusterWriter connected to redis cluster successful. addresses=%v", rw.addresses)
 	return rw
 }
@@ -29,13 +31,13 @@ func (r *RedisClusterWriter) Close() {
 	}
 }
 
-func (r *RedisClusterWriter) loadClusterNodes(opts *RedisWriterOptions) {
-	addresses, slots := utils.GetRedisClusterNodes(opts.Address, opts.Username, opts.Password, opts.Tls, false)
+func (r *RedisClusterWriter) loadClusterNodes(ctx context.Context, opts *RedisWriterOptions) {
+	addresses, slots := utils.GetRedisClusterNodes(ctx, opts.Address, opts.Username, opts.Password, opts.Tls, false)
 	r.addresses = addresses
 	for i, address := range addresses {
 		theOpts := *opts
 		theOpts.Address = address
-		redisWriter := NewRedisStandaloneWriter(&theOpts)
+		redisWriter := NewRedisStandaloneWriter(ctx, &theOpts)
 		r.writers = append(r.writers, redisWriter)
 		for _, s := range slots[i] {
 			if r.router[s] != nil {

internal/writer/redis_standalone_writer.go

@@ -1,6 +1,7 @@
 package writer
 
 import (
+	"context"
 	"fmt"
 	"strconv"
 	"strings"
@@ -40,11 +41,11 @@ type redisStandaloneWriter struct {
 	}
 }
 
-func NewRedisStandaloneWriter(opts *RedisWriterOptions) Writer {
+func NewRedisStandaloneWriter(ctx context.Context, opts *RedisWriterOptions) Writer {
 	rw := new(redisStandaloneWriter)
 	rw.address = opts.Address
 	rw.stat.Name = "writer_" + strings.Replace(opts.Address, ":", "_", -1)
-	rw.client = client.NewRedisClient(opts.Address, opts.Username, opts.Password, opts.Tls)
+	rw.client = client.NewRedisClient(ctx, opts.Address, opts.Username, opts.Password, opts.Tls)
 	if opts.OffReply {
 		log.Infof("turn off the reply of write")
 		rw.offReply = true