linkding/bookmarks/management/commands/migrate_tasks.py
Sascha Ißbrücker a6f35119cd
Replace django-background-tasks with huey (#657)
* Replace django-background-tasks with huey

* Add command for migrating tasks

* Add custom admin view

* fix dockerfile

* fix tests

* fix tests in CI

* fix task tests

* implement retries

* improve config

* workaround to avoid running singlefile tasks in parallel

* properly kill single-file sub-processes

* use period task for HTML snapshots

* clear task lock when starting task consumer

* remove obsolete cleanup task command
2024-04-07 11:11:14 +02:00

75 lines
2.4 KiB
Python

import json
import os
import sqlite3
import importlib
from django.core.management.base import BaseCommand
class Command(BaseCommand):
help = "Migrate tasks from django-background-tasks to Huey"
def handle(self, *args, **options):
db = sqlite3.connect(os.path.join("data", "db.sqlite3"))
# Check if background_task table exists
cursor = db.cursor()
cursor.execute(
"SELECT name FROM sqlite_master WHERE type='table' AND name='background_task'"
)
row = cursor.fetchone()
if not row:
self.stdout.write(
"Legacy task table does not exist. Skipping task migration"
)
return
# Load legacy tasks
cursor.execute("SELECT id, task_name, task_params FROM background_task")
legacy_tasks = cursor.fetchall()
if len(legacy_tasks) == 0:
self.stdout.write("No legacy tasks found. Skipping task migration")
return
self.stdout.write(
f"Found {len(legacy_tasks)} legacy tasks. Migrating to Huey..."
)
# Migrate tasks to Huey
succeeded_tasks = []
for task in legacy_tasks:
task_id = task[0]
task_name = task[1]
task_params_json = task[2]
try:
task_params = json.loads(task_params_json)
function_params = task_params[0]
# Resolve task function
module_name, func_name = task_name.rsplit(".", 1)
module = importlib.import_module(module_name)
func = getattr(module, func_name)
# Call task function
func(*function_params)
succeeded_tasks.append(task_id)
except Exception:
self.stderr.write(f"Error migrating task [{task_id}] {task_name}")
self.stdout.write(f"Migrated {len(succeeded_tasks)} tasks successfully")
# Clean up
try:
placeholders = ", ".join("?" for _ in succeeded_tasks)
sql = f"DELETE FROM background_task WHERE id IN ({placeholders})"
cursor.execute(sql, succeeded_tasks)
db.commit()
self.stdout.write(
f"Deleted {len(succeeded_tasks)} migrated tasks from legacy table"
)
except Exception:
self.stderr.write("Error cleaning up legacy tasks")
cursor.close()
db.close()