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| Current File : //lib/python2.7/site-packages/yum/callbacks.py |
#!/usr/bin/python -tt
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""Classes for handling various callbacks."""
# imports
import logging
from urlgrabber.progress import BaseMeter,format_time,format_number
# ProcessTransaction States
PT_DOWNLOAD = 10 # Start Download
PT_DOWNLOAD_PKGS = 11 # Packages to download
PT_GPGCHECK = 20 # Start Checkin Package Signatures
PT_TEST_TRANS = 30 # Start Test Transaction
PT_TRANSACTION = 40 # Start Transaction
PT_MESSAGES = { PT_DOWNLOAD : "Downloading Packages",
PT_GPGCHECK : "Check Package Signatures",
PT_TEST_TRANS : "Running Test Transaction",
PT_TRANSACTION : "Running Transaction"}
class ProcessTransBaseCallback:
"""A class to handle callbacks from
:func:`YumBase.processTransaction`.
"""
def __init__(self):
self.logger = logging.getLogger('yum.verbose.ProcessTrasactionBaseCallback')
def event(self,state,data=None):
"""Handle an event by logging it.
:param state: a number indicating the type of callback
:param data: data associated with the callback
"""
if state in PT_MESSAGES.keys():
self.logger.info(PT_MESSAGES[state])
class ProcessTransNoOutputCallback:
"""A class to handle callbacks from
:func:`YumBase.processTransaction`, without logging them.
"""
def __init__(self):
pass
def event(self,state,data=None):
"""Handle an event.
:param state: a number indicating the type of callback
:param data: data associated with the callback
"""
pass
class DownloadBaseCallback( BaseMeter ):
"""This is a base class that can be extended to implement a custom
download progress handler to be used with
:func:`YumBase.repos.setProgressBar`.
Example::
from yum.callbacks import DownloadBaseCallback
class MyDownloadCallback( DownloadBaseCallback ):
def updateProgress(self,name,frac,fread,ftime):
'''
Update the progressbar
@param name: filename
@param frac: Progress fracment (0 -> 1)
@param fread: formated string containing BytesRead
@param ftime : formated string containing remaining or elapsed time
'''
pct = int( frac*100 )
print " %s : %s " % (name,pct)
if __name__ == '__main__':
my = YumBase()
my.doConfigSetup()
dnlcb = MyDownloadCallback()
my.repos.setProgressBar( dnlcb )
for pkg in my.pkgSack:
print pkg.name
"""
def __init__(self):
BaseMeter.__init__( self )
self.totSize = "" # Total size to download in a formatted string (Kb, MB etc)
def update( self, amount_read, now=None ):
"""Update the status bar.
:param amount_read: the amount of data, in bytes, that has been read
:param now: the current time in seconds since the epoch. If
*now* is not given, the output of :func:`time.time()` will
be used.
"""
BaseMeter.update( self, amount_read, now )
def _do_start( self, now=None ):
name = self._getName()
self.updateProgress(name,0.0,"","")
if not self.size is None:
self.totSize = format_number( self.size )
def _do_update( self, amount_read, now=None ):
fread = format_number( amount_read )
name = self._getName()
if self.size is None:
# Elapsed time
etime = self.re.elapsed_time()
fetime = format_time( etime )
frac = 0.0
self.updateProgress(name,frac,fread,fetime)
else:
# Remaining time
rtime = self.re.remaining_time()
frtime = format_time( rtime )
frac = self.re.fraction_read()
self.updateProgress(name,frac,fread,frtime)
def _do_end( self, amount_read, now=None ):
total_time = format_time( self.re.elapsed_time() )
total_size = format_number( amount_read )
name = self._getName()
self.updateProgress(name,1.0,total_size,total_time)
def _getName(self):
'''
Get the name of the package being downloaded
'''
if self.text and type( self.text ) == type( "" ):
name = self.text
else:
name = self.basename
return name
def updateProgress(self,name,frac,fread,ftime):
"""Update the progressbar. This method should be overridden
by subclasses to implement the handler.
:param name: the name of the filed being downloaded
:param frac: number between 0 and 1 representing the fraction
fraction of the file that has been downloaded
:param fread: formatted string containing the number of bytes read
:param ftime: formatted string containing remaining or elapsed time
"""
pass