Parallel timer

[Alex Champion]

Hello guys,

I'm new here so thanks in advance for helping me. I have one question about parallel programming.

I`m developing a Shiny app and I need to show a timer which increments its value in one each second.

Moreover I have also several pieces of code which are executed when action buttons are pressed.

I have done several tests and each time I click an action button (and a piece of code is executed), the timer stops.

I know open source R is single thread, I think the problem is related to this fact.

Is there any way to combine a timer without being stopped by the program execution??

Regards,

[Joe Cheng]

Can you show your test code?

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[Alex Champion]

With tests I meant I was changing code several times. The piece of code is the following:

In ui:

fluidRow(column(6,uiOutput('timer')))

In server :

server <- function(input,output,session){

    

    update_time <- reactive({

      invalidateLater(1000)

      trunc(Sys.time() - time)

    })

    

    output$timer <- renderText({

      paste('Execution time :',update_time(),' seconds',sep='')

    })

I set time as a global variable at the beginning of the app.

The code runs perfect until I press whatever action button I have in the app.

How can I handle this issue?

Thanks in advance.