二维状态操作表

主
|----------------|-------------------------------------------------------------------------------------------|
|state\operator  |   update      create      delete      resume              cancel                  pause   |
|----------------|-------------------------------------------------------------------------------------------|
|ready           |   updating    ×           deleting    ×                   ×                       ×       |
|uploading       |   ×           ×           ×           ×                   error                   paused  |
|updating        |   ×           ×           x           x                   rollback(ready/error)   paused  |
|paused          |   updating    ×           deleting    uploading/updating  ×                       ×       |
|error           |   updating    ×           deleting    x                   ×                       ×       |
|deleting        |   ×           ×           ×           ×                   ×                       ×       |
|----------------|-------------------------------------------------------------------------------------------|
 
子
|----------------|----------------------------------------------------------------------|
|state\operator  |   update     resume      pause       cancel              delete      |
|----------------|----------------------------------------------------------------------|
|copying         |   x          ×           x           ×                   ×           |
|moving          |   ×          ×           ×           ×                   ×           |
|pulling         |   ×          ×           x           x                   x           |
|pushing         |   x          ×           x           x                   ×           |
|removing        |   x          ×           x           x                   ×           |
|paused          |   ×          ×           ×           ×                   ×           |
|----------------|----------------------------------------------------------------------|