# Documented in https://zulip.readthedocs.io/en/latest/subsystems/queuing.html import logging import tempfile import time from typing import Any, Dict from urllib.parse import urlsplit from django.conf import settings from django.db import transaction from django.db.models import F from django.utils.timezone import now as timezone_now from django.utils.translation import gettext as _ from django.utils.translation import override as override_language from typing_extensions import override from zerver.actions.message_flags import do_mark_stream_messages_as_read from zerver.actions.message_send import internal_send_private_message from zerver.actions.realm_export import notify_realm_export from zerver.lib.export import export_realm_wrapper from zerver.lib.push_notifications import clear_push_device_tokens from zerver.lib.queue import queue_json_publish, retry_event from zerver.lib.remote_server import ( PushNotificationBouncerRetryLaterError, send_server_data_to_push_bouncer, ) from zerver.lib.soft_deactivation import reactivate_user_if_soft_deactivated from zerver.lib.upload import handle_reupload_emojis_event from zerver.models import Message, Realm, RealmAuditLog, Stream, UserMessage from zerver.models.users import get_system_bot, get_user_profile_by_id from zerver.worker.base import QueueProcessingWorker, assign_queue logger = logging.getLogger(__name__) @assign_queue("deferred_work") class DeferredWorker(QueueProcessingWorker): """This queue processor is intended for cases where we want to trigger a potentially expensive, not urgent, job to be run on a separate thread from the Django worker that initiated it (E.g. so we that can provide a low-latency HTTP response or avoid risk of request timeouts for an operation that could in rare cases take minutes). """ # Because these operations have no SLO, and can take minutes, # remove any processing timeouts MAX_CONSUME_SECONDS = None @override def consume(self, event: Dict[str, Any]) -> None: start = time.time() if event["type"] == "mark_stream_messages_as_read": user_profile = get_user_profile_by_id(event["user_profile_id"]) logger.info( "Marking messages as read for user %s, stream_recipient_ids %s", user_profile.id, event["stream_recipient_ids"], ) for recipient_id in event["stream_recipient_ids"]: count = do_mark_stream_messages_as_read(user_profile, recipient_id) logger.info( "Marked %s messages as read for user %s, stream_recipient_id %s", count, user_profile.id, recipient_id, ) elif event["type"] == "mark_stream_messages_as_read_for_everyone": logger.info( "Marking messages as read for all users, stream_recipient_id %s", event["stream_recipient_id"], ) stream = Stream.objects.get(recipient_id=event["stream_recipient_id"]) # This event is generated by the stream deactivation code path. batch_size = 50 start_time = time.perf_counter() min_id = event.get("min_id", 0) total_messages = 0 while True: with transaction.atomic(savepoint=False): messages = list( Message.objects.filter( # Uses index: zerver_message_realm_recipient_id realm_id=stream.realm_id, recipient_id=event["stream_recipient_id"], id__gt=min_id, ) .order_by("id")[:batch_size] .values_list("id", flat=True) ) UserMessage.select_for_update_query().filter(message__in=messages).extra( where=[UserMessage.where_unread()] ).update(flags=F("flags").bitor(UserMessage.flags.read)) total_messages += len(messages) if len(messages) < batch_size: break min_id = messages[-1] if time.perf_counter() - start_time > 30: # This task may take a _very_ long time to # complete, if we have a large number of messages # to mark as read. If we have taken more than # 30s, we re-push the task onto the tail of the # queue, to allow other deferred work to complete; # this task is extremely low priority. queue_json_publish("deferred_work", {**event, "min_id": min_id}) break logger.info( "Marked %s messages as read for all users, stream_recipient_id %s", total_messages, event["stream_recipient_id"], ) elif event["type"] == "clear_push_device_tokens": logger.info( "Clearing push device tokens for user_profile_id %s", event["user_profile_id"], ) try: clear_push_device_tokens(event["user_profile_id"]) except PushNotificationBouncerRetryLaterError: def failure_processor(event: Dict[str, Any]) -> None: logger.warning( "Maximum retries exceeded for trigger:%s event:clear_push_device_tokens", event["user_profile_id"], ) retry_event(self.queue_name, event, failure_processor) elif event["type"] == "realm_export": realm = Realm.objects.get(id=event["realm_id"]) output_dir = tempfile.mkdtemp(prefix="zulip-export-") export_event = RealmAuditLog.objects.get(id=event["id"]) user_profile = get_user_profile_by_id(event["user_profile_id"]) extra_data = export_event.extra_data if extra_data.get("started_timestamp") is not None: logger.error( "Marking export for realm %s as failed due to retry -- possible OOM during export?", realm.string_id, ) extra_data["failed_timestamp"] = timezone_now().timestamp() export_event.extra_data = extra_data export_event.save(update_fields=["extra_data"]) notify_realm_export(user_profile) return extra_data["started_timestamp"] = timezone_now().timestamp() export_event.extra_data = extra_data export_event.save(update_fields=["extra_data"]) logger.info( "Starting realm export for realm %s into %s, initiated by user_profile_id %s", realm.string_id, output_dir, event["user_profile_id"], ) try: public_url = export_realm_wrapper( realm=realm, output_dir=output_dir, threads=1 if self.threaded else 6, upload=True, public_only=True, ) except Exception: extra_data["failed_timestamp"] = timezone_now().timestamp() export_event.extra_data = extra_data export_event.save(update_fields=["extra_data"]) logging.exception( "Data export for %s failed after %s", user_profile.realm.string_id, time.time() - start, stack_info=True, ) notify_realm_export(user_profile) return assert public_url is not None # Update the extra_data field now that the export is complete. extra_data["export_path"] = urlsplit(public_url).path export_event.extra_data = extra_data export_event.save(update_fields=["extra_data"]) # Send a direct message notification letting the user who # triggered the export know the export finished. with override_language(user_profile.default_language): content = _( "Your data export is complete. [View and download exports]({export_settings_link})." ).format(export_settings_link="/#organization/data-exports-admin") internal_send_private_message( sender=get_system_bot(settings.NOTIFICATION_BOT, realm.id), recipient_user=user_profile, content=content, ) # For future frontend use, also notify administrator # clients that the export happened. notify_realm_export(user_profile) logging.info( "Completed data export for %s in %s", user_profile.realm.string_id, time.time() - start, ) elif event["type"] == "reupload_realm_emoji": # This is a special event queued by the migration for reuploading emojis. # We don't want to run the necessary code in the actual migration, so it simply # queues the necessary event, and the actual work is done here in the queue worker. realm = Realm.objects.get(id=event["realm_id"]) logger.info("Processing reupload_realm_emoji event for realm %s", realm.id) handle_reupload_emojis_event(realm, logger) elif event["type"] == "soft_reactivate": logger.info( "Starting soft reactivation for user_profile_id %s", event["user_profile_id"], ) user_profile = get_user_profile_by_id(event["user_profile_id"]) reactivate_user_if_soft_deactivated(user_profile) elif event["type"] == "push_bouncer_update_for_realm": # In the future we may use the realm_id to send only that single realm's info. realm_id = event["realm_id"] logger.info("Updating push bouncer with metadata on behalf of realm %s", realm_id) send_server_data_to_push_bouncer(consider_usage_statistics=False) end = time.time() logger.info( "deferred_work processed %s event (%dms)", event["type"], (end - start) * 1000, )