add go mysql redis sample

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

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()
+}