add go mysql redis sample

Signed-off-by: vishal979 <shantapowertech2@gmail.com>

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/consistenthash/consistenthash.go

@@ -0,0 +1,81 @@
+/*
+Copyright 2013 Google Inc.
+
+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 consistenthash provides an implementation of a ring hash.
+package consistenthash
+
+import (
+	"hash/crc32"
+	"sort"
+	"strconv"
+)
+
+type Hash func(data []byte) uint32
+
+type Map struct {
+	hash     Hash
+	replicas int
+	keys     []int // Sorted
+	hashMap  map[int]string
+}
+
+func New(replicas int, fn Hash) *Map {
+	m := &Map{
+		replicas: replicas,
+		hash:     fn,
+		hashMap:  make(map[int]string),
+	}
+	if m.hash == nil {
+		m.hash = crc32.ChecksumIEEE
+	}
+	return m
+}
+
+// Returns true if there are no items available.
+func (m *Map) IsEmpty() bool {
+	return len(m.keys) == 0
+}
+
+// Adds some keys to the hash.
+func (m *Map) Add(keys ...string) {
+	for _, key := range keys {
+		for i := 0; i < m.replicas; i++ {
+			hash := int(m.hash([]byte(strconv.Itoa(i) + key)))
+			m.keys = append(m.keys, hash)
+			m.hashMap[hash] = key
+		}
+	}
+	sort.Ints(m.keys)
+}
+
+// Gets the closest item in the hash to the provided key.
+func (m *Map) Get(key string) string {
+	if m.IsEmpty() {
+		return ""
+	}
+
+	hash := int(m.hash([]byte(key)))
+
+	// Binary search for appropriate replica.
+	idx := sort.Search(len(m.keys), func(i int) bool { return m.keys[i] >= hash })
+
+	// Means we have cycled back to the first replica.
+	if idx == len(m.keys) {
+		idx = 0
+	}
+
+	return m.hashMap[m.keys[idx]]
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/errors.go

@@ -0,0 +1,75 @@
+package internal
+
+import (
+	"io"
+	"net"
+	"strings"
+)
+
+const Nil = RedisError("redis: nil")
+
+type RedisError string
+
+func (e RedisError) Error() string { return string(e) }
+
+func IsRetryableError(err error) bool {
+	return IsNetworkError(err)
+}
+
+func IsInternalError(err error) bool {
+	_, ok := err.(RedisError)
+	return ok
+}
+
+func IsNetworkError(err error) bool {
+	if err == io.EOF {
+		return true
+	}
+	_, ok := err.(net.Error)
+	return ok
+}
+
+func IsBadConn(err error, allowTimeout bool) bool {
+	if err == nil {
+		return false
+	}
+	if IsInternalError(err) {
+		return false
+	}
+	if allowTimeout {
+		if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
+			return false
+		}
+	}
+	return true
+}
+
+func IsMovedError(err error) (moved bool, ask bool, addr string) {
+	if !IsInternalError(err) {
+		return
+	}
+
+	s := err.Error()
+	if strings.HasPrefix(s, "MOVED ") {
+		moved = true
+	} else if strings.HasPrefix(s, "ASK ") {
+		ask = true
+	} else {
+		return
+	}
+
+	ind := strings.LastIndex(s, " ")
+	if ind == -1 {
+		return false, false, ""
+	}
+	addr = s[ind+1:]
+	return
+}
+
+func IsLoadingError(err error) bool {
+	return strings.HasPrefix(err.Error(), "LOADING")
+}
+
+func IsExecAbortError(err error) bool {
+	return strings.HasPrefix(err.Error(), "EXECABORT")
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/hashtag/hashtag.go

@@ -0,0 +1,73 @@
+package hashtag
+
+import (
+	"math/rand"
+	"strings"
+)
+
+const SlotNumber = 16384
+
+// CRC16 implementation according to CCITT standards.
+// Copyright 2001-2010 Georges Menie (www.menie.org)
+// Copyright 2013 The Go Authors. All rights reserved.
+// http://redis.io/topics/cluster-spec#appendix-a-crc16-reference-implementation-in-ansi-c
+var crc16tab = [256]uint16{
+	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
+}
+
+func Key(key string) string {
+	if s := strings.IndexByte(key, '{'); s > -1 {
+		if e := strings.IndexByte(key[s+1:], '}'); e > 0 {
+			return key[s+1 : s+e+1]
+		}
+	}
+	return key
+}
+
+// hashSlot returns a consistent slot number between 0 and 16383
+// for any given string key.
+func Slot(key string) int {
+	key = Key(key)
+	if key == "" {
+		return rand.Intn(SlotNumber)
+	}
+	return int(crc16sum(key)) % SlotNumber
+}
+
+func crc16sum(key string) (crc uint16) {
+	for i := 0; i < len(key); i++ {
+		crc = (crc << 8) ^ crc16tab[(byte(crc>>8)^key[i])&0x00ff]
+	}
+	return
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/log.go

@@ -0,0 +1,15 @@
+package internal
+
+import (
+	"fmt"
+	"log"
+)
+
+var Logger *log.Logger
+
+func Logf(s string, args ...interface{}) {
+	if Logger == nil {
+		return
+	}
+	Logger.Output(2, fmt.Sprintf(s, args...))
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/pool/conn.go

@@ -0,0 +1,78 @@
+package pool
+
+import (
+	"net"
+	"sync/atomic"
+	"time"
+
+	"gopkg.in/redis.v5/internal/proto"
+)
+
+var noDeadline = time.Time{}
+
+type Conn struct {
+	netConn net.Conn
+
+	Rd *proto.Reader
+	Wb *proto.WriteBuffer
+
+	Inited bool
+	usedAt atomic.Value
+}
+
+func NewConn(netConn net.Conn) *Conn {
+	cn := &Conn{
+		netConn: netConn,
+		Wb:      proto.NewWriteBuffer(),
+	}
+	cn.Rd = proto.NewReader(cn.netConn)
+	cn.SetUsedAt(time.Now())
+	return cn
+}
+
+func (cn *Conn) UsedAt() time.Time {
+	return cn.usedAt.Load().(time.Time)
+}
+
+func (cn *Conn) SetUsedAt(tm time.Time) {
+	cn.usedAt.Store(tm)
+}
+
+func (cn *Conn) SetNetConn(netConn net.Conn) {
+	cn.netConn = netConn
+	cn.Rd.Reset(netConn)
+}
+
+func (cn *Conn) IsStale(timeout time.Duration) bool {
+	return timeout > 0 && time.Since(cn.UsedAt()) > timeout
+}
+
+func (cn *Conn) SetReadTimeout(timeout time.Duration) error {
+	now := time.Now()
+	cn.SetUsedAt(now)
+	if timeout > 0 {
+		return cn.netConn.SetReadDeadline(now.Add(timeout))
+	}
+	return cn.netConn.SetReadDeadline(noDeadline)
+}
+
+func (cn *Conn) SetWriteTimeout(timeout time.Duration) error {
+	now := time.Now()
+	cn.SetUsedAt(now)
+	if timeout > 0 {
+		return cn.netConn.SetWriteDeadline(now.Add(timeout))
+	}
+	return cn.netConn.SetWriteDeadline(noDeadline)
+}
+
+func (cn *Conn) Write(b []byte) (int, error) {
+	return cn.netConn.Write(b)
+}
+
+func (cn *Conn) RemoteAddr() net.Addr {
+	return cn.netConn.RemoteAddr()
+}
+
+func (cn *Conn) Close() error {
+	return cn.netConn.Close()
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/pool/pool.go

@@ -0,0 +1,354 @@
+package pool
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"gopkg.in/redis.v5/internal"
+)
+
+var (
+	ErrClosed      = errors.New("redis: client is closed")
+	ErrPoolTimeout = errors.New("redis: connection pool timeout")
+	errConnStale   = errors.New("connection is stale")
+)
+
+var timers = sync.Pool{
+	New: func() interface{} {
+		t := time.NewTimer(time.Hour)
+		t.Stop()
+		return t
+	},
+}
+
+// Stats contains pool state information and accumulated stats.
+type Stats struct {
+	Requests uint32 // number of times a connection was requested by the pool
+	Hits     uint32 // number of times free connection was found in the pool
+	Timeouts uint32 // number of times a wait timeout occurred
+
+	TotalConns uint32 // the number of total connections in the pool
+	FreeConns  uint32 // the number of free connections in the pool
+}
+
+type Pooler interface {
+	Get() (*Conn, bool, error)
+	Put(*Conn) error
+	Remove(*Conn, error) error
+	Len() int
+	FreeLen() int
+	Stats() *Stats
+	Close() error
+}
+
+type dialer func() (net.Conn, error)
+
+type ConnPool struct {
+	dial    dialer
+	OnClose func(*Conn) error
+
+	poolTimeout time.Duration
+	idleTimeout time.Duration
+
+	queue chan struct{}
+
+	connsMu sync.Mutex
+	conns   []*Conn
+
+	freeConnsMu sync.Mutex
+	freeConns   []*Conn
+
+	stats Stats
+
+	_closed int32 // atomic
+	lastErr atomic.Value
+}
+
+var _ Pooler = (*ConnPool)(nil)
+
+func NewConnPool(dial dialer, poolSize int, poolTimeout, idleTimeout, idleCheckFrequency time.Duration) *ConnPool {
+	p := &ConnPool{
+		dial: dial,
+
+		poolTimeout: poolTimeout,
+		idleTimeout: idleTimeout,
+
+		queue:     make(chan struct{}, poolSize),
+		conns:     make([]*Conn, 0, poolSize),
+		freeConns: make([]*Conn, 0, poolSize),
+	}
+	if idleTimeout > 0 && idleCheckFrequency > 0 {
+		go p.reaper(idleCheckFrequency)
+	}
+	return p
+}
+
+func (p *ConnPool) NewConn() (*Conn, error) {
+	netConn, err := p.dial()
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(netConn), nil
+}
+
+func (p *ConnPool) PopFree() *Conn {
+	timer := timers.Get().(*time.Timer)
+	timer.Reset(p.poolTimeout)
+
+	select {
+	case p.queue <- struct{}{}:
+		if !timer.Stop() {
+			<-timer.C
+		}
+		timers.Put(timer)
+	case <-timer.C:
+		timers.Put(timer)
+		atomic.AddUint32(&p.stats.Timeouts, 1)
+		return nil
+	}
+
+	p.freeConnsMu.Lock()
+	cn := p.popFree()
+	p.freeConnsMu.Unlock()
+
+	if cn == nil {
+		<-p.queue
+	}
+	return cn
+}
+
+func (p *ConnPool) popFree() *Conn {
+	if len(p.freeConns) == 0 {
+		return nil
+	}
+
+	idx := len(p.freeConns) - 1
+	cn := p.freeConns[idx]
+	p.freeConns = p.freeConns[:idx]
+	return cn
+}
+
+// Get returns existed connection from the pool or creates a new one.
+func (p *ConnPool) Get() (*Conn, bool, error) {
+	if p.closed() {
+		return nil, false, ErrClosed
+	}
+
+	atomic.AddUint32(&p.stats.Requests, 1)
+
+	timer := timers.Get().(*time.Timer)
+	timer.Reset(p.poolTimeout)
+
+	select {
+	case p.queue <- struct{}{}:
+		if !timer.Stop() {
+			<-timer.C
+		}
+		timers.Put(timer)
+	case <-timer.C:
+		timers.Put(timer)
+		atomic.AddUint32(&p.stats.Timeouts, 1)
+		return nil, false, ErrPoolTimeout
+	}
+
+	for {
+		p.freeConnsMu.Lock()
+		cn := p.popFree()
+		p.freeConnsMu.Unlock()
+
+		if cn == nil {
+			break
+		}
+
+		if cn.IsStale(p.idleTimeout) {
+			p.remove(cn, errConnStale)
+			continue
+		}
+
+		atomic.AddUint32(&p.stats.Hits, 1)
+		return cn, false, nil
+	}
+
+	newcn, err := p.NewConn()
+	if err != nil {
+		<-p.queue
+		return nil, false, err
+	}
+
+	p.connsMu.Lock()
+	p.conns = append(p.conns, newcn)
+	p.connsMu.Unlock()
+
+	return newcn, true, nil
+}
+
+func (p *ConnPool) Put(cn *Conn) error {
+	if data := cn.Rd.PeekBuffered(); data != nil {
+		err := fmt.Errorf("connection has unread data: %q", data)
+		internal.Logf(err.Error())
+		return p.Remove(cn, err)
+	}
+	p.freeConnsMu.Lock()
+	p.freeConns = append(p.freeConns, cn)
+	p.freeConnsMu.Unlock()
+	<-p.queue
+	return nil
+}
+
+func (p *ConnPool) Remove(cn *Conn, reason error) error {
+	p.remove(cn, reason)
+	<-p.queue
+	return nil
+}
+
+func (p *ConnPool) remove(cn *Conn, reason error) {
+	_ = p.closeConn(cn, reason)
+
+	p.connsMu.Lock()
+	for i, c := range p.conns {
+		if c == cn {
+			p.conns = append(p.conns[:i], p.conns[i+1:]...)
+			break
+		}
+	}
+	p.connsMu.Unlock()
+}
+
+// Len returns total number of connections.
+func (p *ConnPool) Len() int {
+	p.connsMu.Lock()
+	l := len(p.conns)
+	p.connsMu.Unlock()
+	return l
+}
+
+// FreeLen returns number of free connections.
+func (p *ConnPool) FreeLen() int {
+	p.freeConnsMu.Lock()
+	l := len(p.freeConns)
+	p.freeConnsMu.Unlock()
+	return l
+}
+
+func (p *ConnPool) Stats() *Stats {
+	return &Stats{
+		Requests:   atomic.LoadUint32(&p.stats.Requests),
+		Hits:       atomic.LoadUint32(&p.stats.Hits),
+		Timeouts:   atomic.LoadUint32(&p.stats.Timeouts),
+		TotalConns: uint32(p.Len()),
+		FreeConns:  uint32(p.FreeLen()),
+	}
+}
+
+func (p *ConnPool) closed() bool {
+	return atomic.LoadInt32(&p._closed) == 1
+}
+
+func (p *ConnPool) Close() error {
+	if !atomic.CompareAndSwapInt32(&p._closed, 0, 1) {
+		return ErrClosed
+	}
+
+	p.connsMu.Lock()
+	var firstErr error
+	for _, cn := range p.conns {
+		if cn == nil {
+			continue
+		}
+		if err := p.closeConn(cn, ErrClosed); err != nil && firstErr == nil {
+			firstErr = err
+		}
+	}
+	p.conns = nil
+	p.connsMu.Unlock()
+
+	p.freeConnsMu.Lock()
+	p.freeConns = nil
+	p.freeConnsMu.Unlock()
+
+	return firstErr
+}
+
+func (p *ConnPool) closeConn(cn *Conn, reason error) error {
+	if p.OnClose != nil {
+		_ = p.OnClose(cn)
+	}
+	return cn.Close()
+}
+
+func (p *ConnPool) reapStaleConn() bool {
+	if len(p.freeConns) == 0 {
+		return false
+	}
+
+	cn := p.freeConns[0]
+	if !cn.IsStale(p.idleTimeout) {
+		return false
+	}
+
+	p.remove(cn, errConnStale)
+	p.freeConns = append(p.freeConns[:0], p.freeConns[1:]...)
+
+	return true
+}
+
+func (p *ConnPool) ReapStaleConns() (int, error) {
+	var n int
+	for {
+		p.queue <- struct{}{}
+		p.freeConnsMu.Lock()
+
+		reaped := p.reapStaleConn()
+
+		p.freeConnsMu.Unlock()
+		<-p.queue
+
+		if reaped {
+			n++
+		} else {
+			break
+		}
+	}
+	return n, nil
+}
+
+func (p *ConnPool) reaper(frequency time.Duration) {
+	ticker := time.NewTicker(frequency)
+	defer ticker.Stop()
+
+	for _ = range ticker.C {
+		if p.closed() {
+			break
+		}
+		n, err := p.ReapStaleConns()
+		if err != nil {
+			internal.Logf("ReapStaleConns failed: %s", err)
+			continue
+		}
+		s := p.Stats()
+		internal.Logf(
+			"reaper: removed %d stale conns (TotalConns=%d FreeConns=%d Requests=%d Hits=%d Timeouts=%d)",
+			n, s.TotalConns, s.FreeConns, s.Requests, s.Hits, s.Timeouts,
+		)
+	}
+}
+
+//------------------------------------------------------------------------------
+
+var idleCheckFrequency atomic.Value
+
+func SetIdleCheckFrequency(d time.Duration) {
+	idleCheckFrequency.Store(d)
+}
+
+func getIdleCheckFrequency() time.Duration {
+	v := idleCheckFrequency.Load()
+	if v == nil {
+		return time.Minute
+	}
+	return v.(time.Duration)
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/pool/pool_single.go

@@ -0,0 +1,47 @@
+package pool
+
+type SingleConnPool struct {
+	cn *Conn
+}
+
+var _ Pooler = (*SingleConnPool)(nil)
+
+func NewSingleConnPool(cn *Conn) *SingleConnPool {
+	return &SingleConnPool{
+		cn: cn,
+	}
+}
+
+func (p *SingleConnPool) Get() (*Conn, bool, error) {
+	return p.cn, false, nil
+}
+
+func (p *SingleConnPool) Put(cn *Conn) error {
+	if p.cn != cn {
+		panic("p.cn != cn")
+	}
+	return nil
+}
+
+func (p *SingleConnPool) Remove(cn *Conn, _ error) error {
+	if p.cn != cn {
+		panic("p.cn != cn")
+	}
+	return nil
+}
+
+func (p *SingleConnPool) Len() int {
+	return 1
+}
+
+func (p *SingleConnPool) FreeLen() int {
+	return 0
+}
+
+func (p *SingleConnPool) Stats() *Stats {
+	return nil
+}
+
+func (p *SingleConnPool) Close() error {
+	return nil
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/pool/pool_sticky.go

@@ -0,0 +1,119 @@
+package pool
+
+import (
+	"errors"
+	"sync"
+)
+
+type StickyConnPool struct {
+	pool     *ConnPool
+	reusable bool
+
+	cn     *Conn
+	closed bool
+	mu     sync.Mutex
+}
+
+var _ Pooler = (*StickyConnPool)(nil)
+
+func NewStickyConnPool(pool *ConnPool, reusable bool) *StickyConnPool {
+	return &StickyConnPool{
+		pool:     pool,
+		reusable: reusable,
+	}
+}
+
+func (p *StickyConnPool) Get() (*Conn, bool, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.closed {
+		return nil, false, ErrClosed
+	}
+	if p.cn != nil {
+		return p.cn, false, nil
+	}
+
+	cn, _, err := p.pool.Get()
+	if err != nil {
+		return nil, false, err
+	}
+	p.cn = cn
+	return cn, true, nil
+}
+
+func (p *StickyConnPool) putUpstream() (err error) {
+	err = p.pool.Put(p.cn)
+	p.cn = nil
+	return err
+}
+
+func (p *StickyConnPool) Put(cn *Conn) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.closed {
+		return ErrClosed
+	}
+	return nil
+}
+
+func (p *StickyConnPool) removeUpstream(reason error) error {
+	err := p.pool.Remove(p.cn, reason)
+	p.cn = nil
+	return err
+}
+
+func (p *StickyConnPool) Remove(cn *Conn, reason error) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.closed {
+		return nil
+	}
+	return p.removeUpstream(reason)
+}
+
+func (p *StickyConnPool) Len() int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.cn == nil {
+		return 0
+	}
+	return 1
+}
+
+func (p *StickyConnPool) FreeLen() int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.cn == nil {
+		return 1
+	}
+	return 0
+}
+
+func (p *StickyConnPool) Stats() *Stats {
+	return nil
+}
+
+func (p *StickyConnPool) Close() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if p.closed {
+		return ErrClosed
+	}
+	p.closed = true
+	var err error
+	if p.cn != nil {
+		if p.reusable {
+			err = p.putUpstream()
+		} else {
+			reason := errors.New("redis: unreusable sticky connection")
+			err = p.removeUpstream(reason)
+		}
+	}
+	return err
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/proto/reader.go

@@ -0,0 +1,334 @@
+package proto
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"strconv"
+
+	"gopkg.in/redis.v5/internal"
+)
+
+const bytesAllocLimit = 1024 * 1024 // 1mb
+
+const (
+	ErrorReply  = '-'
+	StatusReply = '+'
+	IntReply    = ':'
+	StringReply = '$'
+	ArrayReply  = '*'
+)
+
+type MultiBulkParse func(*Reader, int64) (interface{}, error)
+
+type Reader struct {
+	src *bufio.Reader
+	buf []byte
+}
+
+func NewReader(rd io.Reader) *Reader {
+	return &Reader{
+		src: bufio.NewReader(rd),
+		buf: make([]byte, 4096),
+	}
+}
+
+func (r *Reader) Reset(rd io.Reader) {
+	r.src.Reset(rd)
+}
+
+func (p *Reader) PeekBuffered() []byte {
+	if n := p.src.Buffered(); n != 0 {
+		b, _ := p.src.Peek(n)
+		return b
+	}
+	return nil
+}
+
+func (p *Reader) ReadN(n int) ([]byte, error) {
+	b, err := readN(p.src, p.buf, n)
+	if err != nil {
+		return nil, err
+	}
+	p.buf = b
+	return b, nil
+}
+
+func (p *Reader) ReadLine() ([]byte, error) {
+	line, isPrefix, err := p.src.ReadLine()
+	if err != nil {
+		return nil, err
+	}
+	if isPrefix {
+		return nil, bufio.ErrBufferFull
+	}
+	if len(line) == 0 {
+		return nil, internal.RedisError("redis: reply is empty")
+	}
+	if isNilReply(line) {
+		return nil, internal.Nil
+	}
+	return line, nil
+}
+
+func (p *Reader) ReadReply(m MultiBulkParse) (interface{}, error) {
+	line, err := p.ReadLine()
+	if err != nil {
+		return nil, err
+	}
+
+	switch line[0] {
+	case ErrorReply:
+		return nil, ParseErrorReply(line)
+	case StatusReply:
+		return parseStatusValue(line), nil
+	case IntReply:
+		return parseInt(line[1:], 10, 64)
+	case StringReply:
+		return p.readTmpBytesValue(line)
+	case ArrayReply:
+		n, err := parseArrayLen(line)
+		if err != nil {
+			return nil, err
+		}
+		return m(p, n)
+	}
+	return nil, fmt.Errorf("redis: can't parse %.100q", line)
+}
+
+func (p *Reader) ReadIntReply() (int64, error) {
+	line, err := p.ReadLine()
+	if err != nil {
+		return 0, err
+	}
+	switch line[0] {
+	case ErrorReply:
+		return 0, ParseErrorReply(line)
+	case IntReply:
+		return parseInt(line[1:], 10, 64)
+	default:
+		return 0, fmt.Errorf("redis: can't parse int reply: %.100q", line)
+	}
+}
+
+func (p *Reader) ReadTmpBytesReply() ([]byte, error) {
+	line, err := p.ReadLine()
+	if err != nil {
+		return nil, err
+	}
+	switch line[0] {
+	case ErrorReply:
+		return nil, ParseErrorReply(line)
+	case StringReply:
+		return p.readTmpBytesValue(line)
+	case StatusReply:
+		return parseStatusValue(line), nil
+	default:
+		return nil, fmt.Errorf("redis: can't parse string reply: %.100q", line)
+	}
+}
+
+func (r *Reader) ReadBytesReply() ([]byte, error) {
+	b, err := r.ReadTmpBytesReply()
+	if err != nil {
+		return nil, err
+	}
+	cp := make([]byte, len(b))
+	copy(cp, b)
+	return cp, nil
+}
+
+func (p *Reader) ReadStringReply() (string, error) {
+	b, err := p.ReadTmpBytesReply()
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}
+
+func (p *Reader) ReadFloatReply() (float64, error) {
+	b, err := p.ReadTmpBytesReply()
+	if err != nil {
+		return 0, err
+	}
+	return parseFloat(b, 64)
+}
+
+func (p *Reader) ReadArrayReply(m MultiBulkParse) (interface{}, error) {
+	line, err := p.ReadLine()
+	if err != nil {
+		return nil, err
+	}
+	switch line[0] {
+	case ErrorReply:
+		return nil, ParseErrorReply(line)
+	case ArrayReply:
+		n, err := parseArrayLen(line)
+		if err != nil {
+			return nil, err
+		}
+		return m(p, n)
+	default:
+		return nil, fmt.Errorf("redis: can't parse array reply: %.100q", line)
+	}
+}
+
+func (p *Reader) ReadArrayLen() (int64, error) {
+	line, err := p.ReadLine()
+	if err != nil {
+		return 0, err
+	}
+	switch line[0] {
+	case ErrorReply:
+		return 0, ParseErrorReply(line)
+	case ArrayReply:
+		return parseArrayLen(line)
+	default:
+		return 0, fmt.Errorf("redis: can't parse array reply: %.100q", line)
+	}
+}
+
+func (p *Reader) ReadScanReply() ([]string, uint64, error) {
+	n, err := p.ReadArrayLen()
+	if err != nil {
+		return nil, 0, err
+	}
+	if n != 2 {
+		return nil, 0, fmt.Errorf("redis: got %d elements in scan reply, expected 2", n)
+	}
+
+	cursor, err := p.ReadUint()
+	if err != nil {
+		return nil, 0, err
+	}
+
+	n, err = p.ReadArrayLen()
+	if err != nil {
+		return nil, 0, err
+	}
+
+	keys := make([]string, n)
+	for i := int64(0); i < n; i++ {
+		key, err := p.ReadStringReply()
+		if err != nil {
+			return nil, 0, err
+		}
+		keys[i] = key
+	}
+
+	return keys, cursor, err
+}
+
+func (p *Reader) readTmpBytesValue(line []byte) ([]byte, error) {
+	if isNilReply(line) {
+		return nil, internal.Nil
+	}
+
+	replyLen, err := strconv.Atoi(string(line[1:]))
+	if err != nil {
+		return nil, err
+	}
+
+	b, err := p.ReadN(replyLen + 2)
+	if err != nil {
+		return nil, err
+	}
+	return b[:replyLen], nil
+}
+
+func (r *Reader) ReadInt() (int64, error) {
+	b, err := r.ReadTmpBytesReply()
+	if err != nil {
+		return 0, err
+	}
+	return parseInt(b, 10, 64)
+}
+
+func (r *Reader) ReadUint() (uint64, error) {
+	b, err := r.ReadTmpBytesReply()
+	if err != nil {
+		return 0, err
+	}
+	return parseUint(b, 10, 64)
+}
+
+// --------------------------------------------------------------------
+
+func readN(r io.Reader, b []byte, n int) ([]byte, error) {
+	if n == 0 && b == nil {
+		return make([]byte, 0), nil
+	}
+
+	if cap(b) >= n {
+		b = b[:n]
+		_, err := io.ReadFull(r, b)
+		return b, err
+	}
+	b = b[:cap(b)]
+
+	pos := 0
+	for pos < n {
+		diff := n - len(b)
+		if diff > bytesAllocLimit {
+			diff = bytesAllocLimit
+		}
+		b = append(b, make([]byte, diff)...)
+
+		nn, err := io.ReadFull(r, b[pos:])
+		if err != nil {
+			return nil, err
+		}
+		pos += nn
+	}
+
+	return b, nil
+}
+
+func formatInt(n int64) string {
+	return strconv.FormatInt(n, 10)
+}
+
+func formatUint(u uint64) string {
+	return strconv.FormatUint(u, 10)
+}
+
+func formatFloat(f float64) string {
+	return strconv.FormatFloat(f, 'f', -1, 64)
+}
+
+func isNilReply(b []byte) bool {
+	return len(b) == 3 &&
+		(b[0] == StringReply || b[0] == ArrayReply) &&
+		b[1] == '-' && b[2] == '1'
+}
+
+func ParseErrorReply(line []byte) error {
+	return internal.RedisError(string(line[1:]))
+}
+
+func parseStatusValue(line []byte) []byte {
+	return line[1:]
+}
+
+func parseArrayLen(line []byte) (int64, error) {
+	if isNilReply(line) {
+		return 0, internal.Nil
+	}
+	return parseInt(line[1:], 10, 64)
+}
+
+func atoi(b []byte) (int, error) {
+	return strconv.Atoi(internal.BytesToString(b))
+}
+
+func parseInt(b []byte, base int, bitSize int) (int64, error) {
+	return strconv.ParseInt(internal.BytesToString(b), base, bitSize)
+}
+
+func parseUint(b []byte, base int, bitSize int) (uint64, error) {
+	return strconv.ParseUint(internal.BytesToString(b), base, bitSize)
+}
+
+func parseFloat(b []byte, bitSize int) (float64, error) {
+	return strconv.ParseFloat(internal.BytesToString(b), bitSize)
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/proto/scan.go

@@ -0,0 +1,131 @@
+package proto
+
+import (
+	"encoding"
+	"fmt"
+	"reflect"
+
+	"gopkg.in/redis.v5/internal"
+)
+
+func Scan(b []byte, v interface{}) error {
+	switch v := v.(type) {
+	case nil:
+		return internal.RedisError("redis: Scan(nil)")
+	case *string:
+		*v = internal.BytesToString(b)
+		return nil
+	case *[]byte:
+		*v = b
+		return nil
+	case *int:
+		var err error
+		*v, err = atoi(b)
+		return err
+	case *int8:
+		n, err := parseInt(b, 10, 8)
+		if err != nil {
+			return err
+		}
+		*v = int8(n)
+		return nil
+	case *int16:
+		n, err := parseInt(b, 10, 16)
+		if err != nil {
+			return err
+		}
+		*v = int16(n)
+		return nil
+	case *int32:
+		n, err := parseInt(b, 10, 32)
+		if err != nil {
+			return err
+		}
+		*v = int32(n)
+		return nil
+	case *int64:
+		n, err := parseInt(b, 10, 64)
+		if err != nil {
+			return err
+		}
+		*v = n
+		return nil
+	case *uint:
+		n, err := parseUint(b, 10, 64)
+		if err != nil {
+			return err
+		}
+		*v = uint(n)
+		return nil
+	case *uint8:
+		n, err := parseUint(b, 10, 8)
+		if err != nil {
+			return err
+		}
+		*v = uint8(n)
+		return nil
+	case *uint16:
+		n, err := parseUint(b, 10, 16)
+		if err != nil {
+			return err
+		}
+		*v = uint16(n)
+		return nil
+	case *uint32:
+		n, err := parseUint(b, 10, 32)
+		if err != nil {
+			return err
+		}
+		*v = uint32(n)
+		return nil
+	case *uint64:
+		n, err := parseUint(b, 10, 64)
+		if err != nil {
+			return err
+		}
+		*v = n
+		return nil
+	case *float32:
+		n, err := parseFloat(b, 32)
+		if err != nil {
+			return err
+		}
+		*v = float32(n)
+		return err
+	case *float64:
+		var err error
+		*v, err = parseFloat(b, 64)
+		return err
+	case *bool:
+		*v = len(b) == 1 && b[0] == '1'
+		return nil
+	case encoding.BinaryUnmarshaler:
+		return v.UnmarshalBinary(b)
+	default:
+		return fmt.Errorf(
+			"redis: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v)
+	}
+}
+
+func ScanSlice(data []string, slice interface{}) error {
+	v := reflect.ValueOf(slice)
+	if !v.IsValid() {
+		return fmt.Errorf("redis: ScanSlice(nil)")
+	}
+	if v.Kind() != reflect.Ptr {
+		return fmt.Errorf("redis: ScanSlice(non-pointer %T)", slice)
+	}
+	v = v.Elem()
+	if v.Kind() != reflect.Slice {
+		return fmt.Errorf("redis: ScanSlice(non-slice %T)", slice)
+	}
+
+	for i, s := range data {
+		elem := internal.SliceNextElem(v)
+		if err := Scan([]byte(s), elem.Addr().Interface()); err != nil {
+			return fmt.Errorf("redis: ScanSlice(index=%d value=%q) failed: %s", i, s, err)
+		}
+	}
+
+	return nil
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/proto/write_buffer.go

@@ -0,0 +1,105 @@
+package proto
+
+import (
+	"encoding"
+	"fmt"
+	"strconv"
+)
+
+const bufferSize = 4096
+
+type WriteBuffer struct {
+	b []byte
+}
+
+func NewWriteBuffer() *WriteBuffer {
+	return &WriteBuffer{
+		b: make([]byte, 0, 4096),
+	}
+}
+
+func (w *WriteBuffer) Len() int      { return len(w.b) }
+func (w *WriteBuffer) Bytes() []byte { return w.b }
+func (w *WriteBuffer) Reset()        { w.b = w.b[:0] }
+
+func (w *WriteBuffer) Append(args []interface{}) error {
+	w.b = append(w.b, ArrayReply)
+	w.b = strconv.AppendUint(w.b, uint64(len(args)), 10)
+	w.b = append(w.b, '\r', '\n')
+
+	for _, arg := range args {
+		if err := w.append(arg); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (w *WriteBuffer) append(val interface{}) error {
+	switch v := val.(type) {
+	case nil:
+		w.AppendString("")
+	case string:
+		w.AppendString(v)
+	case []byte:
+		w.AppendBytes(v)
+	case int:
+		w.AppendString(formatInt(int64(v)))
+	case int8:
+		w.AppendString(formatInt(int64(v)))
+	case int16:
+		w.AppendString(formatInt(int64(v)))
+	case int32:
+		w.AppendString(formatInt(int64(v)))
+	case int64:
+		w.AppendString(formatInt(v))
+	case uint:
+		w.AppendString(formatUint(uint64(v)))
+	case uint8:
+		w.AppendString(formatUint(uint64(v)))
+	case uint16:
+		w.AppendString(formatUint(uint64(v)))
+	case uint32:
+		w.AppendString(formatUint(uint64(v)))
+	case uint64:
+		w.AppendString(formatUint(v))
+	case float32:
+		w.AppendString(formatFloat(float64(v)))
+	case float64:
+		w.AppendString(formatFloat(v))
+	case bool:
+		if v {
+			w.AppendString("1")
+		} else {
+			w.AppendString("0")
+		}
+	default:
+		if bm, ok := val.(encoding.BinaryMarshaler); ok {
+			bb, err := bm.MarshalBinary()
+			if err != nil {
+				return err
+			}
+			w.AppendBytes(bb)
+		} else {
+			return fmt.Errorf(
+				"redis: can't marshal %T (consider implementing encoding.BinaryMarshaler)", val)
+		}
+	}
+	return nil
+}
+
+func (w *WriteBuffer) AppendString(s string) {
+	w.b = append(w.b, StringReply)
+	w.b = strconv.AppendUint(w.b, uint64(len(s)), 10)
+	w.b = append(w.b, '\r', '\n')
+	w.b = append(w.b, s...)
+	w.b = append(w.b, '\r', '\n')
+}
+
+func (w *WriteBuffer) AppendBytes(p []byte) {
+	w.b = append(w.b, StringReply)
+	w.b = strconv.AppendUint(w.b, uint64(len(p)), 10)
+	w.b = append(w.b, '\r', '\n')
+	w.b = append(w.b, p...)
+	w.b = append(w.b, '\r', '\n')
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/safe.go

@@ -0,0 +1,7 @@
+// +build appengine
+
+package internal
+
+func BytesToString(b []byte) string {
+	return string(b)
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/unsafe.go

@@ -0,0 +1,14 @@
+// +build !appengine
+
+package internal
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+func BytesToString(b []byte) string {
+	bytesHeader := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	strHeader := reflect.StringHeader{bytesHeader.Data, bytesHeader.Len}
+	return *(*string)(unsafe.Pointer(&strHeader))
+}

go-mysql-redis/vendor/gopkg.in/redis.v5/internal/util.go

@@ -0,0 +1,47 @@
+package internal
+
+import "reflect"
+
+func ToLower(s string) string {
+	if isLower(s) {
+		return s
+	}
+
+	b := make([]byte, len(s))
+	for i := range b {
+		c := s[i]
+		if c >= 'A' && c <= 'Z' {
+			c += 'a' - 'A'
+		}
+		b[i] = c
+	}
+	return BytesToString(b)
+}
+
+func isLower(s string) bool {
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		if c >= 'A' && c <= 'Z' {
+			return false
+		}
+	}
+	return true
+}
+
+func SliceNextElem(v reflect.Value) reflect.Value {
+	if v.Len() < v.Cap() {
+		v.Set(v.Slice(0, v.Len()+1))
+		return v.Index(v.Len() - 1)
+	}
+
+	elemType := v.Type().Elem()
+
+	if elemType.Kind() == reflect.Ptr {
+		elem := reflect.New(elemType.Elem())
+		v.Set(reflect.Append(v, elem))
+		return elem.Elem()
+	}
+
+	v.Set(reflect.Append(v, reflect.Zero(elemType)))
+	return v.Index(v.Len() - 1)
+}