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progressbar.py
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progressbar.py
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# -*- coding:utf-8 -*-
import sys
import util, log
import datetime
import time
from threadpool import ThreadPool
from Queue import Queue
from threading import Thread
from threadpool import Terminate_Watcher
logger_name = 'progressBarLogger'
log.setup_log(logger_name,'INFO', 'INFO', '/tmp/foo.log')
LOG = log.get_logger(logger_name)
fmt_dl_header = u' Progress Monitor :[%s] | Threads Pool:[%d]\n'
fmt_dl_progress = u' Progress [%d/%d]:'
fmt_dl_last_finished = u' Latest %d finished tasks:\n'
fmt_dl_failed_jobs = u' Failed tasks:\n'
fmt_progress = '%s [%s] %.1f%%\n'
SHOW_DONE_NUMBER = 5
class JobStatus:
"""
An Enum class to indicate the status of a Job
"""
Waiting = 0
Running = 1
Success = 2
Failed = 3
class JobProgress(object):
"""
progress object for single job
"""
def __init__(self, name, total_value=100):
self.name = name
self.total_value = total_value
self.finished_value = 0
self.start = datetime.datetime.now()
def add_finished_value(self, increment):
self.finished_value += increment
def set_finished_value(self, finished_value):
self.finished_value = finished_value
def set_finished_percentage(self, finished_perc):
self.finished_value = float(finished_perc)/100 * self.total_value
def add_finished_percentage(self, finished_perc):
self.finished_value += float(finished_perc)/100.0*self.total_value
def percent(self):
"""calculate finished percentage"""
return float(self.finished_value) / float(self.total_value) if self.total_value else 0.0
def rate(self):
""" calculate finishing speed """
elapsed = datetime.datetime.now() - self.start
return float(self.total_value - self.finished_value)/float(elapsed.total_seconds())
class Progressbar(object):
#the factor of width used for progress bar
percent_bar_factor = 0.4
def __init__(self, jobs, title='', pool_size=1):
#total number of jobs
self.title = title
self.total = len(jobs)
self.jobs = jobs
self.pool_size = pool_size
#the number of finished jobs
self.done=0
self.done2show=[]
self.success_list=[]
self.failed_list=[]
def has_work_to_do(self):
return self.done < self.total
def __update_status(self):
self.success_list = [job for job in self.jobs if job.status == JobStatus.Success]
self.failed_list = [job for job in self.jobs if job.status == JobStatus.Failed]
self.done = len(self.success_list) + len(self.failed_list)
self.done2show = self.success_list[-1:-1-SHOW_DONE_NUMBER:-1]
self.failed_list = self.failed_list[::-1]
def print_progress(self):
self.__update_status()
def output(txt):
sys.stdout.write(txt)
width = util.get_terminal_size()[1] -5
bar_count = (int(width*self.__class__.percent_bar_factor)-2/10) # number of percent bar
line = log.hl(u' %s\n'% ('+'*width), 'cyan')
sep = log.hl(u' %s\n'% ('='*width), 'cyan')
output(u'\x1b[2J\x1b[H') #clear screen
sys.stdout.write(line)
header = fmt_dl_header % (self.title, self.pool_size)
sys.stdout.write(log.hl(u' %s' % header,'warning'))
sys.stdout.write(line)
all_p = [] #all progress bars, filled by following for loop
sum_percent = 0 # total percent for running job
sum_rate = 0 # total rate for running job
total_percent = 0
for job in [j for j in self.jobs if j.status == JobStatus.Running]:
prog_obj = job.progress
percent = prog_obj.percent()
#sum for the total progress
sum_percent += percent
bar = util.ljust('=' * int(percent * bar_count), bar_count)
per100 = percent * 100
single_p = fmt_progress % \
(util.rjust(prog_obj.name,(width - bar_count)-32), bar, per100) # the -20 is for the xx.x% and [ and ] xx.xkb/s (spaces)
all_p.append(log.hl(single_p,'green'))
#calculate total progress percent
total_percent = float(sum_percent+self.done)/self.total
#global progress
g_text = fmt_dl_progress % (self.done, self.total)
g_bar = util.ljust('#' * int(total_percent* bar_count), bar_count)
g_progress = fmt_progress % \
(util.rjust(g_text,(width - bar_count - 32)), g_bar, 100*total_percent) # the -20 is for the xx.x% and [ and ] xx.xkb/s (spaces)
#output all total progress bars
sys.stdout.write(log.hl(u'%s'%g_progress, 'red'))
sys.stdout.write(sep)
#output all downloads' progress bars
sys.stdout.write(''.join(all_p))
# finished jobs
if len(self.done2show):
sys.stdout.write(line)
sys.stdout.write(log.hl(fmt_dl_last_finished % SHOW_DONE_NUMBER,'warning'))
sys.stdout.write(line)
#display finished jobs
for job in self.done2show:
sys.stdout.write(log.hl(u' √ %s\n'% job.name,'cyan'))
#failed downloads
if len(self.failed_list):
sys.stdout.write(line)
sys.stdout.write(log.hl(fmt_dl_failed_jobs,'error'))
sys.stdout.write(line)
#display failed jobs
for failed_job in self.failed_list:
sys.stdout.write(log.hl(u' ✘ %s\n' % failed_job.name,'red'))
sys.stdout.write(line)
sys.stdout.flush()
def start_jobs(jobs, title='', threadpool_size=1):
Terminate_Watcher()
pool = ThreadPool(threadpool_size)
executer = Executer(jobs, pool)
executer.start()
progress_bar = Progressbar(jobs, title, threadpool_size)
while progress_bar.has_work_to_do():
time.sleep(1)
progress_bar.print_progress()
class Job(object):
def __init__(self, name, totol_effort=100):
self.name = name
self.progress = JobProgress(name, totol_effort )
self.execute_result = 0
self.status = JobStatus.Waiting
def start_work(self):
self.status = JobStatus.Running
self.execute_result = self.execute()
self.__post_execution()
def execute(self):
x = 0
while x < 5:
time.sleep(1)
x+=1
self.progress.add_finished_percentage(20)
return 0
def __post_execution(self):
self.status = JobStatus.Failed if self.execute_result else JobStatus.Success
class Executer(Thread):
def __init__(self, jobs, threadpool):
Thread.__init__(self)
self.jobs = jobs
self.pool = threadpool
def run(self):
for job in self.jobs:
self.pool.add_task(job.start_work)
self.pool.wait_completion()
if __name__ == '__main__':
jobs =[]
for x in xrange(1):
jobs.append(Job("job_"+str(x)))
start_jobs(jobs,'foo',3)