def RunTask():
"""
Checks current jobs and run a one task if it is possible.
Verifies if it is possible to start a new task,
the maximum number of simultaneously running ``Jobs`` is limited.
"""
if len(tasks()) == 0:
return False
if len(jobs()) >= MAXIMUM_JOBS_STARTED:
return False
from customer import fire_hire
if not fire_hire.IsAllHired():
if _Debug:
lg.out(
_DebugLevel,
'backup_control.RunTask some suppliers not hired yet, retry after 5 sec'
)
reactor.callLater(5, RunTask) # @UndefinedVariable
return False
T = tasks().pop(0)
message = T.run()
if message:
events.send('backup-task-failed',
data=dict(
path_id=T.pathID,
message=message,
))
T.result_defer.errback((T.pathID, message))
else:
# events.send('backup-task-executed', data=dict(path_id=T.pathID, backup_id=T.backupID, ))
T.result_defer.callback((T.backupID, None))
T.destroy(message)
return True
def start(self):
from twisted.internet.defer import Deferred
from logs import lg
from main.config import conf
from main import events
from raid import eccmap
from services import driver
from customer import fire_hire
self.starting_deferred = Deferred()
self.starting_deferred.addErrback(
lambda err: lg.warn('service %r was not started: %r' %
(self.service_name, err.getErrorMessage()
if err else 'unknown reason')))
self.all_suppliers_hired_event_sent = False
if driver.is_on('service_entangled_dht'):
self._do_join_suppliers_dht_layer()
eccmap.Update()
fire_hire.A('init')
fire_hire.A().addStateChangedCallback(self._on_fire_hire_ready, None,
'READY')
conf().addConfigNotifier('services/customer/suppliers-number',
self._on_suppliers_number_modified)
conf().addConfigNotifier('services/customer/needed-space',
self._on_needed_space_modified)
events.add_subscriber(self._on_supplier_modified, 'supplier-modified')
events.add_subscriber(self._on_dht_layer_connected,
event_id='dht-layer-connected')
if fire_hire.IsAllHired():
self.starting_deferred.callback(True)
self.starting_deferred = None
lg.info('all my suppliers are already hired')
return True
fire_hire.A('restart')
return self.starting_deferred
def doOverallCheckUp(self, *args, **kwargs):
"""
Action method.
"""
from customer import fire_hire
if not fire_hire.IsAllHired():
if _Debug:
lg.out(
_DebugLevel,
'backup_monitor.doOverallCheckUp some suppliers not hired yet, restart now'
)
self.automat('restart')
return
if online_status.listOfflineSuppliers():
if time.time() - self.last_execution_time > 60:
# re-sync every 1 min. if at least on supplier is dead
if _Debug:
lg.out(
_DebugLevel,
'backup_monitor.doOverallCheckUp restart after 1 min, found offline suppliers'
)
self.automat('restart')
return
if time.time() - self.last_execution_time > 60 * 10:
# also re-sync every 10 min.
if _Debug:
lg.out(
_DebugLevel,
'backup_monitor.doOverallCheckUp periodic 10 min. restart'
)
self.automat('restart')
return
def start(self):
from logs import lg
from customer import fire_hire
if not fire_hire.IsAllHired():
lg.warn('service_list_files() can not start right now, not all suppliers hired yet')
return False
from customer import list_files_orator
list_files_orator.A('init')
return True
def _on_my_suppliers_all_hired(self, evt):
from logs import lg
from services import driver
if driver.is_enabled('service_data_motion'):
if not driver.is_started('service_data_motion'):
from customer import fire_hire
if fire_hire.IsAllHired():
lg.info(
'all my suppliers are hired, starting service_data_motion()'
)
driver.start_single('service_data_motion')
def start(self):
from logs import lg
from customer import fire_hire
if not fire_hire.IsAllHired():
lg.warn('service_data_motion() can not start right now, not all suppliers hired yet')
return False
from main import events
from stream import io_throttle
from stream import data_sender
from stream import data_receiver
io_throttle.init()
data_sender.A('init')
data_receiver.A('init')
events.add_subscriber(self._on_identity_url_changed, 'identity-url-changed')
return True
def _do_check_all_hired(self):
from logs import lg
from main import events
from customer import fire_hire
if fire_hire.IsAllHired():
self._do_cleanup_dht_suppliers()
if not self.all_suppliers_hired_event_sent:
lg.info('at the moment all my suppliers are hired and known')
self.all_suppliers_hired_event_sent = True
events.send('my-suppliers-all-hired', data=dict())
if self.starting_deferred and not self.starting_deferred.called:
self.starting_deferred.callback(True)
self.starting_deferred = None
else:
self.all_suppliers_hired_event_sent = False
lg.info('some of my supplies are not hired yet')
events.send('my-suppliers-yet-not-hired', data=dict())
if self.starting_deferred and not self.starting_deferred.called:
self.starting_deferred.errback(
Exception('not possible to hire enough suppliers'))
self.starting_deferred = None
