def execute_ops(self):
LOG.info("Starting %s periodic task.", self.task)
context = neutron_context.get_admin_context()
# Lock make sure that periodic task is executed only after
# specified interval. It makes sure that maintenance tasks
# are not executed back to back.
if self.task_already_executed_recently(context):
LOG.info(
"Periodic %s task executed after periodic interval "
"Skipping execution.", self.task)
return
if not db.lock_periodic_task(context.session, self.task):
LOG.info("Periodic %s task already running task", self.task)
return
try:
for phase in self.phases:
self._execute_op(phase, context)
finally:
db.update_periodic_task(context.session,
task=self.task,
operation=None)
db.unlock_periodic_task(context.session, self.task)
LOG.info("%s task has been finished", self.task)
def _execute_op(self, operation, context):
op_details = operation.__name__
if operation.__doc__:
op_details += " (%s)" % operation.func_doc
try:
LOG.info("Starting %s phase of periodic task %s.", op_details,
self.task)
db.update_periodic_task(context.session,
task=self.task,
operation=operation)
operation(context=context)
LOG.info("Finished %s phase of %s task.", op_details, self.task)
except Exception:
LOG.exception("Failed during periodic task operation %s.",
op_details)
def _clear_and_unlock_task(self, context):
session = context.session
with db_api.autonested_transaction(session):
db.update_periodic_task(session, task=self.task, operation=None)
db.unlock_periodic_task(session, self.task)
def _set_operation(self, context, operation):
session = context.session
with db_api.autonested_transaction(session):
db.update_periodic_task(session,
task=self.task,
operation=operation)
def _clear_and_unlock_task(self, context):
db.update_periodic_task(context, task=self.task,
operation=None)
db.unlock_periodic_task(context, self.task)
def _set_operation(self, context, operation):
db.update_periodic_task(context, task=self.task,
operation=operation)
def _clear_and_unlock_task(self, context):
db.update_periodic_task(context, task=self.task, operation=None)
db.unlock_periodic_task(context, self.task)
def _set_operation(self, context, operation):
db.update_periodic_task(context, task=self.task, operation=operation)