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check_latest_es_backup.py
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check_latest_es_backup.py
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from portality import models, app_email
from portality.background import BackgroundTask, BackgroundApi
from portality.core import app, es_connection
from portality.lib.es_snapshot import ESSnapshotsClient
from portality.tasks.helpers import background_helper
from portality.tasks.redis_huey import main_queue
class CheckLatestESBackupBackgroundTask(BackgroundTask):
__action__ = "check_latest_es_backup"
def run(self):
"""
Execute the task as specified by the background_job
:return:
"""
try:
client = ESSnapshotsClient(es_connection, app.config['ELASTIC_SEARCH_SNAPSHOT_REPOSITORY'])
client.check_today_snapshot()
except Exception as e:
app_email.send_mail(
to=[app.config.get('ADMIN_EMAIL', 'sysadmin@cottagelabs.com')],
fro=app.config.get('SYSTEM_EMAIL_FROM', 'helpdesk@doaj.org'),
subject='Alert: DOAJ ElasticSearch backup failure',
msg_body="Today's ES snapshot has not been found by the checking task. Error: \n" + str(e)
)
raise e
def cleanup(self):
"""
Cleanup after a successful OR failed run of the task
:return:
"""
pass
@classmethod
def prepare(cls, username, **kwargs):
"""
Take an arbitrary set of keyword arguments and return an instance of a BackgroundJob,
or fail with a suitable exception
:param kwargs: arbitrary keyword arguments pertaining to this task type
:return: a BackgroundJob instance representing this task
"""
# first prepare a job record
return background_helper.create_job(username, cls.__action__, queue_id=huey_helper.queue_id)
@classmethod
def submit(cls, background_job):
"""
Submit the specified BackgroundJob to the background queue
:param background_job: the BackgroundJob instance
:return:
"""
background_job.save()
check_latest_es_backup.schedule(args=(background_job.id,), delay=10)
huey_helper = CheckLatestESBackupBackgroundTask.create_huey_helper(main_queue)
@huey_helper.register_schedule
def scheduled_check_latest_es_backup():
user = app.config.get("SYSTEM_USERNAME")
job = CheckLatestESBackupBackgroundTask.prepare(user)
CheckLatestESBackupBackgroundTask.submit(job)
@huey_helper.register_execute(is_load_config=False)
def check_latest_es_backup(job_id):
job = models.BackgroundJob.pull(job_id)
task = CheckLatestESBackupBackgroundTask(job)
BackgroundApi.execute(task)