Joey Armstrong | a6af152 | 2023-01-17 16:06:16 -0500 | [diff] [blame] | 1 | package pool |
| 2 | |
| 3 | import ( |
| 4 | "bufio" |
| 5 | "context" |
| 6 | "net" |
| 7 | "sync/atomic" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/go-redis/redis/v8/internal" |
| 11 | "github.com/go-redis/redis/v8/internal/proto" |
| 12 | "go.opentelemetry.io/otel/api/trace" |
| 13 | ) |
| 14 | |
| 15 | var noDeadline = time.Time{} |
| 16 | |
| 17 | type Conn struct { |
| 18 | usedAt int64 // atomic |
| 19 | netConn net.Conn |
| 20 | |
| 21 | rd *proto.Reader |
| 22 | bw *bufio.Writer |
| 23 | wr *proto.Writer |
| 24 | |
| 25 | Inited bool |
| 26 | pooled bool |
| 27 | createdAt time.Time |
| 28 | } |
| 29 | |
| 30 | func NewConn(netConn net.Conn) *Conn { |
| 31 | cn := &Conn{ |
| 32 | netConn: netConn, |
| 33 | createdAt: time.Now(), |
| 34 | } |
| 35 | cn.rd = proto.NewReader(netConn) |
| 36 | cn.bw = bufio.NewWriter(netConn) |
| 37 | cn.wr = proto.NewWriter(cn.bw) |
| 38 | cn.SetUsedAt(time.Now()) |
| 39 | return cn |
| 40 | } |
| 41 | |
| 42 | func (cn *Conn) UsedAt() time.Time { |
| 43 | unix := atomic.LoadInt64(&cn.usedAt) |
| 44 | return time.Unix(unix, 0) |
| 45 | } |
| 46 | |
| 47 | func (cn *Conn) SetUsedAt(tm time.Time) { |
| 48 | atomic.StoreInt64(&cn.usedAt, tm.Unix()) |
| 49 | } |
| 50 | |
| 51 | func (cn *Conn) SetNetConn(netConn net.Conn) { |
| 52 | cn.netConn = netConn |
| 53 | cn.rd.Reset(netConn) |
| 54 | cn.bw.Reset(netConn) |
| 55 | } |
| 56 | |
| 57 | func (cn *Conn) Write(b []byte) (int, error) { |
| 58 | return cn.netConn.Write(b) |
| 59 | } |
| 60 | |
| 61 | func (cn *Conn) RemoteAddr() net.Addr { |
| 62 | if cn.netConn != nil { |
| 63 | return cn.netConn.RemoteAddr() |
| 64 | } |
| 65 | return nil |
| 66 | } |
| 67 | |
| 68 | func (cn *Conn) WithReader(ctx context.Context, timeout time.Duration, fn func(rd *proto.Reader) error) error { |
| 69 | return internal.WithSpan(ctx, "redis.with_reader", func(ctx context.Context, span trace.Span) error { |
| 70 | if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil { |
| 71 | return internal.RecordError(ctx, err) |
| 72 | } |
| 73 | if err := fn(cn.rd); err != nil { |
| 74 | return internal.RecordError(ctx, err) |
| 75 | } |
| 76 | return nil |
| 77 | }) |
| 78 | } |
| 79 | |
| 80 | func (cn *Conn) WithWriter( |
| 81 | ctx context.Context, timeout time.Duration, fn func(wr *proto.Writer) error, |
| 82 | ) error { |
| 83 | return internal.WithSpan(ctx, "redis.with_writer", func(ctx context.Context, span trace.Span) error { |
| 84 | if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil { |
| 85 | return internal.RecordError(ctx, err) |
| 86 | } |
| 87 | |
| 88 | if cn.bw.Buffered() > 0 { |
| 89 | cn.bw.Reset(cn.netConn) |
| 90 | } |
| 91 | |
| 92 | if err := fn(cn.wr); err != nil { |
| 93 | return internal.RecordError(ctx, err) |
| 94 | } |
| 95 | |
| 96 | if err := cn.bw.Flush(); err != nil { |
| 97 | return internal.RecordError(ctx, err) |
| 98 | } |
| 99 | |
| 100 | internal.WritesCounter.Add(ctx, 1) |
| 101 | |
| 102 | return nil |
| 103 | }) |
| 104 | } |
| 105 | |
| 106 | func (cn *Conn) Close() error { |
| 107 | return cn.netConn.Close() |
| 108 | } |
| 109 | |
| 110 | func (cn *Conn) deadline(ctx context.Context, timeout time.Duration) time.Time { |
| 111 | tm := time.Now() |
| 112 | cn.SetUsedAt(tm) |
| 113 | |
| 114 | if timeout > 0 { |
| 115 | tm = tm.Add(timeout) |
| 116 | } |
| 117 | |
| 118 | if ctx != nil { |
| 119 | deadline, ok := ctx.Deadline() |
| 120 | if ok { |
| 121 | if timeout == 0 { |
| 122 | return deadline |
| 123 | } |
| 124 | if deadline.Before(tm) { |
| 125 | return deadline |
| 126 | } |
| 127 | return tm |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if timeout > 0 { |
| 132 | return tm |
| 133 | } |
| 134 | |
| 135 | return noDeadline |
| 136 | } |