Repeat DLT

dab

title: 'Event driven communication repeat and dlt'
boxes ids: 'component' 'repeat-0'  at: [-6,0] size: [2,2] span: 1
box id: account text: 'account' size: [4,1] at: [0,-1] color: black
box id: user text: 'balance: 10' size: [4,2] color: black
line at: [-7,-1] end: [-1, -1] width: 2
line at: [-5,-1] end: [-5, 0] width: 2
line at: [-2,-1] end: [-2, 0] width: 2
box: 'event broker' at: [-7, -2] size: [3,1] color: white
dot id: ch1 at: [-8.5, -1.5] visible: false color: black
dot id: ch2 at: [-8.5, -1.5] visible: false color: black
step: '(1) change 1 balance to 20'
ch1 <- visible: true, ch1 -> +[3,0]
ch1 ->  +[0,2.5]
user <- color: red
step: '(2) change 1 failed, went to repeat topic'
ch1 -> -[0,2.5]
ch1 -> +[3,0]
ch1 ->  +[0,2.5]
step: '(3) change 2 balance to 30'
ch2 <- visible: true, ch2 -> +[3,0]
ch2 ->  +[0,2.5]
user <- color: black text: 'balance: 30'
step: 'change 1 balance to 20 repeat reapeared'
ch1 ->  -[0,2.5]
ch1 -> -[3,0]
ch1 ->  +[0,2.5]
ch2 <- visible: false, ch2->[0,0]
user <- color: black text: 'balance: 20'