Help Needed on re ordering and resequencing a list of rules in Java server side

Guys I am currently developing a web application, in which rules, which are basically sql queries are obtained from the DB and showed using Jquery sortable. These queries are running based upon a command Sequence (1,2,3) and Status (0,1,2 ..20 ). The command sequence tells you, in which order you have to run . Also the status field is helpful in knowing , whenever an error occurred. It saves the value 1 or 2 ... or 20 , to help identify at which step it stopped. Below I ha开发者_Go百科ve given a UI representation , my problem is that, when the user drags the rules, the cmdSequence and the Status have to updated in DB.

Ref Id   RuleNo  CmdSequence   Status
  1        1            1         0
  2        2            2         0
  3        3            1         1
  4        4            1         1
  5        5            2         2
  6        6            2         2 

if i am moving refId 6 before refId 1 then the CmdSequence and Status should be changed. as below ,simillarly drag and dropping in the middle and last

Ref Id   RuleNo  CmdSequence   Status
  6        6            1         0
  1        1            2         0
  2        2            1         1
  3        3            2         1
  4        4            1         2
  5        5            2         2

i want to know how to implement in the server side , while data from browser comes from json.

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You will have to detect the change and possibly be making several updates to the database after each user drags a rule up or down.