Text processing/Max licenses in use
You are encouraged to solve this task according to the task description, using any language you may know.
A company currently pays a fixed sum for the use of a particular licensed software package. In determining if it has a good deal it decides to calculate its maximum use of the software from its license management log file.
Assume the softwares file faithfully records a checkout event when a copy of the software starts and a checkin event when the software finishes. An example of checkout and checkin events are:
License OUT @ 2008/10/03_23:51:05 for job 4974 ... License IN @ 2008/10/04_00:18:22 for job 4974
Save the 10,000 line log file from here* into a local file then write a program to scan the file extracting both the maximum licenses that were out at any time, and the time(s) that at which this occurs.
- Note: The page uses javascript to display a text file, so it may be best to cut-n-paste from a browser to a text file rather than downloading the URL.
Python
Python 2.6 <python>import urllib
def max_out(logfile):
maxout =0
maxouttimes = []
out = 0
for line in logfile:
direction = line[8]
time = line[14:33]
if direction == 'O':
out +=1
if out > maxout:
maxout = out
maxouttimes = [time]
elif out == maxout:
maxouttimes.append(time)
else:
out -=1
return maxout, maxouttimes
if __name__ == '__main__':
log = file('license_example_log.txt')
maxout, maxouttimes = max_out(log)
log.close()
print "Maximum simultaneous license use is %i at the following times:\n %s" % (
maxout, '\n '.join(maxouttimes))</python>
Example output:
Maximum simultaneous license use is 99 at the following times: 2008/10/03_08:39:34 2008/10/03_08:40:40