FileProgressBar: A progress bar that sets the size of a file accordingly

Description

Package: R.utils Class FileProgressBar

Object ~~| ~~+--ProgressBar ~~~~~~~| ~~~~~~~+--FileProgressBar

Directly known subclasses:

public static class FileProgressBar extends ProgressBar

Usage

FileProgressBar(pathname=NULL, ...)

Arguments

pathname

The pathname of the output file.

...

Other arguments accepted by the ProgressBar constructor.

Fields and Methods

Methods:

	`cleanup`	Removes the progress file for a file progress bar.
	`update`	Updates file progress bar.

Methods inherited from ProgressBar: as.character, getBarString, increase, isDone, reset, setMaxValue, setProgress, setStepLength, setTicks, setValue, update

Methods inherited from Object: $, $<-, [[, [[<-, as.character, attach, attachLocally, clearCache, clearLookupCache, clone, detach, equals, extend, finalize, getEnvironment, getFieldModifier, getFieldModifiers, getFields, getInstantiationTime, getStaticInstance, hasField, hashCode, ll, load, names, objectSize, print, save

Details

A progress bar that sets the size of a file accordingly. This class useful to check the progress of a batch job by just querying the size of a file, for instance, via ftp.

Examples

Run this code

# NOT RUN {
  
# }
# NOT RUN {
  
# Creates a progress bar (of length 100) that displays it self as a file.

pb <- FileProgressBar(file.path(tempdir(), "progress.simulation"), max = 10L)
reset(pb)
while (!isDone(pb)) {
  x <- rnorm(3e4)
  increase(pb)
  # Emulate a slow process
  if (interactive()) Sys.sleep(0.1)
  cat(sprintf("File size: %d bytes\n", file.info(pb$pathname)$size))
  Sys.sleep(0.01)
}

  
# }
# NOT RUN {
 
# }