def enumerate_batteries():
"""
This function enumerates the batteries on the system and creates
an entry in the DataBase table for each.
This is deprecated by the update loop itself.
"""
batts = acpi.batteries()
for batt in batts:
b = None
try:
b = Batt.objects.get(name=batt[0])
except ObjectDoesNotExist:
log.debug("creating new entry for '%s'"%batt[0])
if b is None:
b=Batt(name=batt[0],
status_text=batt[1],
percent_full=batt[2],
remaining_text=batt[4],
)
else:
b.status_text=batt[1]
b.percent_full=batt[2]
b.remaining_text=batt[4]
b.save()
def stop(self, args): """ Writing a special entry to the table is probably not the best way to get this signal meta-conditions to the update thread. TODO. """ b=Batt(name='STOP_UPDATING') b.save()
def enumerate_batteries():
"""
This function enumerates the batteries on the system and creates
an entry in the DataBase table for each.
This is deprecated by the update loop itself.
"""
batts = acpi.batteries()
for batt in batts:
b = None
try:
b = Batt.objects.get(name=batt[0])
except ObjectDoesNotExist:
log.debug("creating new entry for '%s'" % batt[0])
if b is None:
b = Batt(
name=batt[0],
status_text=batt[1],
percent_full=batt[2],
remaining_text=batt[4],
)
else:
b.status_text = batt[1]
b.percent_full = batt[2]
b.remaining_text = batt[4]
b.save()
def stop(self, args):
"""
Writing a special entry to the table is probably not the best way to get this
signal meta-conditions to the update thread. TODO.
"""
b = Batt(name='STOP_UPDATING')
b.save()
def start(self, args):
"""
This function starts a loop, intended to be run in parallel to the main server process,
to asynchronously maintain the database with up-to-date
The loop will iterate the entries in the maintained databases (e.g. batteries) and action them in the following way:
- if the entry is a known meta-command, this will be executed. These can be used to stop the looping, for example.
- if the entry matches a currently installed battery, this entry will be updated with the status
- if the entry is not a command and does not match installed batteries, it will be flagged as absent (NOT YET IMPLEMENTED)
If any batteries are found to be present in the system and not in the database, they will be added.
"""
stop = False
#enumerate_batteries()
while not stop:
log.debug('hwupdate running (period=%.2fsec)...'%(UPDATE_PERIOD))
sleep(UPDATE_PERIOD)
log.debug("Reading ACPI battery information...")
batts = acpi.batteries()
log.debug("...done reading ACPI (%d found)." % (len(batts)))
battnames = [b[0] for b in batts]
known_batts = []
try:
log.debug("Scanning database...")
with transaction.commit_on_success():
dbbatteries = Batt.objects.all()
for dbbatt in dbbatteries:
if dbbatt.name == 'STOP_UPDATING':
log.info("hwupdate async task signaled to stop. Stopping.")
stop = True
dbbatt.delete()
elif dbbatt.name in battnames:
log.debug("Battery '%s' matches in ACPI and DB." % (dbbatt.name))
hwbatt=batts[battnames.index(dbbatt.name)]
dbbatt.status=hwbatt.status
dbbatt.level=hwbatt.level
dbbatt.uptime=hwbatt.uptime
dbbatt.str_uptime=hwbatt.str_uptime
dbbatt.save()
log.debug(" - updating with %s/%d/%s" % (hwbatt.status, hwbatt.level, hwbatt.str_uptime))
known_batts += [dbbatt.name]
else:
log.info("Battery '%s' in DB is absent in ACPI." % dbbatt.name)
log.debug("Checking all HW batteries")
for hwbatt in batts:
if hwbatt[0] not in known_batts:
log.info("Battery '%s' in ACPI is absent in DB. Adding." % hwbatt.name)
dbbatt=Batt(name=hwbatt.name,
level=hwbatt.level,
status=hwbatt.status,
uptime=hwbatt.uptime,
str_uptime=hwbatt.str_uptime,
)
dbbatt.save()
log.debug("...done scanning DataBase.")
except Exception as ex:
log.exception('HWUpdate got exception: %s'%str(ex))
def start(self, args):
"""
This function starts a loop, intended to be run in parallel to the main server process,
to asynchronously maintain the database with up-to-date
The loop will iterate the entries in the maintained databases (e.g. batteries) and action them in the following way:
- if the entry is a known meta-command, this will be executed. These can be used to stop the looping, for example.
- if the entry matches a currently installed battery, this entry will be updated with the status
- if the entry is not a command and does not match installed batteries, it will be flagged as absent (NOT YET IMPLEMENTED)
If any batteries are found to be present in the system and not in the database, they will be added.
"""
stop = False
#enumerate_batteries()
while not stop:
log.debug('hwupdate running (period=%.2fsec)...' % (UPDATE_PERIOD))
sleep(UPDATE_PERIOD)
log.debug("Reading ACPI battery information...")
batts = acpi.batteries()
log.debug("...done reading ACPI (%d found)." % (len(batts)))
battnames = [b[0] for b in batts]
known_batts = []
try:
log.debug("Scanning database...")
with transaction.commit_on_success():
dbbatteries = Batt.objects.all()
for dbbatt in dbbatteries:
if dbbatt.name == 'STOP_UPDATING':
log.info(
"hwupdate async task signaled to stop. Stopping."
)
stop = True
dbbatt.delete()
elif dbbatt.name in battnames:
log.debug("Battery '%s' matches in ACPI and DB." %
(dbbatt.name))
hwbatt = batts[battnames.index(dbbatt.name)]
dbbatt.status = hwbatt.status
dbbatt.level = hwbatt.level
dbbatt.uptime = hwbatt.uptime
dbbatt.str_uptime = hwbatt.str_uptime
dbbatt.save()
log.debug(" - updating with %s/%d/%s" %
(hwbatt.status, hwbatt.level,
hwbatt.str_uptime))
known_batts += [dbbatt.name]
else:
log.info("Battery '%s' in DB is absent in ACPI." %
dbbatt.name)
log.debug("Checking all HW batteries")
for hwbatt in batts:
if hwbatt[0] not in known_batts:
log.info(
"Battery '%s' in ACPI is absent in DB. Adding." %
hwbatt.name)
dbbatt = Batt(
name=hwbatt.name,
level=hwbatt.level,
status=hwbatt.status,
uptime=hwbatt.uptime,
str_uptime=hwbatt.str_uptime,
)
dbbatt.save()
log.debug("...done scanning DataBase.")
except Exception as ex:
log.exception('HWUpdate got exception: %s' % str(ex))