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Counters

whereami stores in counters when a whereami call was invoked in a script during a session. This information can be used in control reactivity in shiny app development and testing.

Below shows the basics of accessing and controlling counters.

library(whereami)


txt_1 <- "
whereami::cat_where(whereami::whereami(tag = 'tag1'))
"

txt_2 <- "whereami::cat_where(whereami::whereami(tag = 'tag2'))"

tf_1 <- tempfile(fileext = '.R')
tf_2 <- tempfile(fileext = '.R')

cat(txt_1,file = tf_1)
cat(txt_2,file = tf_2)

source(tf_1)
source(tf_2)

Query Counter State


# All counters
counter_state()

# A single counter
counter_state(tag = 'tag1')

Accessing Counters


# Counter names
counter_names()

# Counter tags
counter_tags()

Retrieve Counters

counters <- counter_get()

counters

Manipulating Counters

Using counter_reset and counter_state in a loop


for( i in 1:10 ){

  source(tf_1)
  source(tf_2)

  if( counter_state(tag = 'tag1') > 5 )
    counter_reset(tag = 'tag2')
}

Plot Method

plot(counter_get())

json logs

A json log of the counter is written to file.path(tempdir(),'whereami.json') by default. The path can be set using set_whereami_log().

jsonlite::read_json(
file.path(tempdir(),'whereami.json'),
simplifyVector = TRUE)

Clear all counters

counter_reset()

Verify that there are no active counters.

counter_state()

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.