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#!/usr/bin/env python3 |
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# -*- coding: utf-8 -*- |
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""" |
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Created on Tue Jan 15 16:42:24 2019 |
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@author: Paolo Cozzi <[email protected]> |
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""" |
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import redis |
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from contextlib import contextmanager |
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from celery.five import monotonic |
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from django.conf import settings |
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from image_app.models import Submission, Sample, Animal, DictUberon, \ |
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DictDevelStage, DictPhysioStage, DictSex, DictSpecie |
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from submissions.helpers import send_message |
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from validation.helpers import construct_validation_message |
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from common.constants import NEED_REVISION |
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# Lock expires in 10 minutes |
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LOCK_EXPIRE = 60 * 10 |
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class BatchUpdateMixin: |
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"""Mixin to do batch update of fields to fix validation""" |
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def batch_update(self, submission_id, ids, attribute, item_type): |
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for id, value in ids.items(): |
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if value == '' or value == 'None': |
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value = None |
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if item_type == 'sample': |
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item_object = Sample.objects.get(pk=id) |
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elif item_type == 'animal': |
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item_object = Animal.objects.get(pk=id) |
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elif item_type == 'dictuberon': |
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item_object = DictUberon.objects.get(pk=id) |
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elif item_type == 'dictdevelstage': |
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item_object = DictDevelStage.objects.get(pk=id) |
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elif item_type == 'dictphysiostage': |
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item_object = DictPhysioStage.objects.get(pk=id) |
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elif item_type == 'dictsex': |
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item_object = DictSex.objects.get(pk=id) |
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elif item_type == 'dictspecie_animal' or \ |
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item_type == 'dictspecie_sample': |
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item_object = DictSpecie.objects.get(pk=id) |
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if getattr(item_object, attribute) != value: |
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setattr(item_object, attribute, value) |
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item_object.save() |
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# Update submission |
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submission_obj = Submission.objects.get(pk=submission_id) |
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submission_obj.status = NEED_REVISION |
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submission_obj.message = "Data updated, try to rerun validation" |
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submission_obj.save() |
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send_message( |
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submission_obj, construct_validation_message(submission_obj) |
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) |
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@contextmanager |
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def redis_lock(lock_id, blocking=False): |
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# read parameters from settings |
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REDIS_CLIENT = redis.StrictRedis( |
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host=settings.REDIS_HOST, |
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port=settings.REDIS_PORT, |
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db=settings.REDIS_DB) |
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timeout_at = monotonic() + LOCK_EXPIRE - 3 |
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lock = REDIS_CLIENT.lock(lock_id, timeout=LOCK_EXPIRE) |
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status = lock.acquire(blocking=blocking) |
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try: |
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yield status |
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finally: |
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# we take advantage of using add() for atomic locking |
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if monotonic() < timeout_at and status: |
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# don't release the lock if we exceeded the timeout |
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# to lessen the chance of releasing an expired lock |
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# owned by someone else |
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# also don't release the lock if we didn't acquire it |
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lock.release() |
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cnr-ibba /
IMAGE-InjectTool
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