| 70 | } |
| 71 | |
| 72 | func (d *forwardSemiAsync) Forward(s *Slot, r *Request, hkey []byte) error { |
| 73 | var loop int |
| 74 | for { |
| 75 | s.lock.RLock() |
| 76 | bc, retry, err := d.process(s, r, hkey) |
| 77 | s.lock.RUnlock() |
| 78 | |
| 79 | switch { |
| 80 | case err != nil: |
| 81 | return err |
| 82 | case !retry: |
| 83 | if bc != nil { |
| 84 | bc.PushBack(r) |
| 85 | } |
| 86 | return nil |
| 87 | } |
| 88 | |
| 89 | var delay time.Duration |
| 90 | switch { |
| 91 | case loop < 5: |
| 92 | delay = 0 |
| 93 | case loop < 20: |
| 94 | delay = time.Millisecond * time.Duration(loop) |
| 95 | default: |
| 96 | delay = time.Millisecond * 20 |
| 97 | } |
| 98 | time.Sleep(delay) |
| 99 | |
| 100 | if r.IsBroken() { |
| 101 | return ErrRequestIsBroken |
| 102 | } |
| 103 | loop += 1 |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | func (d *forwardSemiAsync) process(s *Slot, r *Request, hkey []byte) (_ *BackendConn, retry bool, _ error) { |
| 108 | if s.backend.bc == nil { |