question: public IStatus run ( IProgressMonitor monitor ) { InputStream input = null ; FileOutputStream output = null ; IStatus jobStatus = Status . OK_STATUS ; byte [ ] b = new byte [ 1024 ] ; int bytesRead ; try { HttpURLConnection connection = ( HttpURLConnection ) url . openConnection ( ) ; input = url . openStream ( ) ; long totalBytesRead = 0L ; int responseStatusCode = connection . getResponseCode ( ) ; if ( responseStatusCode >= HttpURLConnection . HTTP_BAD_REQUEST ) { jobStatus = new Status ( Status . ERROR , CorePlugin . PLUGIN_ID , MessageFormat . format ( "Remote ServerError: {0} ({1})" , responseStatusCode , connection . getResponseMessage ( ) ) ) ; } long contentLength = connection . getContentLength ( ) ; output = new FileOutputStream ( target ) ; monitor . beginTask ( "Downloading " + url . toString ( ) , ( int ) contentLength ) ; while ( jobStatus == Status . OK_STATUS ) { if ( contentLength > 0 && totalBytesRead >= contentLength ) { break ; } bytesRead = input . read ( b ) ; if ( bytesRead == - 1 ) { break ; } output . write ( b , 0 , bytesRead ) ; totalBytesRead += bytesRead ; monitor . worked ( bytesRead ) ; if ( monitor . isCanceled ( ) ) { jobStatus = Status . CANCEL_STATUS ; break ; } } } catch ( MalformedURLException e ) { jobStatus = new Status ( Status . ERROR , CorePlugin . PLUGIN_ID , "Malformed URL: " + url . toExternalForm ( ) , e ) ; } catch ( IOException e ) { jobStatus = new Status ( Status . ERROR , CorePlugin . PLUGIN_ID , "IO error while downloading " + url . toExternalForm ( ) , e ) ; } closeStreams ( input , output ) ; return jobStatus ; }
target:  Executes the downloadRunnable using the provided monitor to update the user and provide cancel capabilities.