| package pool |
| |
| import ( |
| "bufio" |
| "context" |
| "net" |
| "sync/atomic" |
| "time" |
| |
| "github.com/go-redis/redis/v8/internal" |
| "github.com/go-redis/redis/v8/internal/proto" |
| "go.opentelemetry.io/otel/api/trace" |
| ) |
| |
| var noDeadline = time.Time{} |
| |
| type Conn struct { |
| usedAt int64 // atomic |
| netConn net.Conn |
| |
| rd *proto.Reader |
| bw *bufio.Writer |
| wr *proto.Writer |
| |
| Inited bool |
| pooled bool |
| createdAt time.Time |
| } |
| |
| func NewConn(netConn net.Conn) *Conn { |
| cn := &Conn{ |
| netConn: netConn, |
| createdAt: time.Now(), |
| } |
| cn.rd = proto.NewReader(netConn) |
| cn.bw = bufio.NewWriter(netConn) |
| cn.wr = proto.NewWriter(cn.bw) |
| cn.SetUsedAt(time.Now()) |
| return cn |
| } |
| |
| func (cn *Conn) UsedAt() time.Time { |
| unix := atomic.LoadInt64(&cn.usedAt) |
| return time.Unix(unix, 0) |
| } |
| |
| func (cn *Conn) SetUsedAt(tm time.Time) { |
| atomic.StoreInt64(&cn.usedAt, tm.Unix()) |
| } |
| |
| func (cn *Conn) SetNetConn(netConn net.Conn) { |
| cn.netConn = netConn |
| cn.rd.Reset(netConn) |
| cn.bw.Reset(netConn) |
| } |
| |
| func (cn *Conn) Write(b []byte) (int, error) { |
| return cn.netConn.Write(b) |
| } |
| |
| func (cn *Conn) RemoteAddr() net.Addr { |
| if cn.netConn != nil { |
| return cn.netConn.RemoteAddr() |
| } |
| return nil |
| } |
| |
| func (cn *Conn) WithReader(ctx context.Context, timeout time.Duration, fn func(rd *proto.Reader) error) error { |
| return internal.WithSpan(ctx, "redis.with_reader", func(ctx context.Context, span trace.Span) error { |
| if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil { |
| return internal.RecordError(ctx, err) |
| } |
| if err := fn(cn.rd); err != nil { |
| return internal.RecordError(ctx, err) |
| } |
| return nil |
| }) |
| } |
| |
| func (cn *Conn) WithWriter( |
| ctx context.Context, timeout time.Duration, fn func(wr *proto.Writer) error, |
| ) error { |
| return internal.WithSpan(ctx, "redis.with_writer", func(ctx context.Context, span trace.Span) error { |
| if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil { |
| return internal.RecordError(ctx, err) |
| } |
| |
| if cn.bw.Buffered() > 0 { |
| cn.bw.Reset(cn.netConn) |
| } |
| |
| if err := fn(cn.wr); err != nil { |
| return internal.RecordError(ctx, err) |
| } |
| |
| if err := cn.bw.Flush(); err != nil { |
| return internal.RecordError(ctx, err) |
| } |
| |
| internal.WritesCounter.Add(ctx, 1) |
| |
| return nil |
| }) |
| } |
| |
| func (cn *Conn) Close() error { |
| return cn.netConn.Close() |
| } |
| |
| func (cn *Conn) deadline(ctx context.Context, timeout time.Duration) time.Time { |
| tm := time.Now() |
| cn.SetUsedAt(tm) |
| |
| if timeout > 0 { |
| tm = tm.Add(timeout) |
| } |
| |
| if ctx != nil { |
| deadline, ok := ctx.Deadline() |
| if ok { |
| if timeout == 0 { |
| return deadline |
| } |
| if deadline.Before(tm) { |
| return deadline |
| } |
| return tm |
| } |
| } |
| |
| if timeout > 0 { |
| return tm |
| } |
| |
| return noDeadline |
| } |