使用SQS撤销Celery任务

Question

I am using Celery + Kombu with Amazon SQL. The goal is to be able to a remove a task already scheduled for some specific datetime. I've tried

from celery.task.control import revoke
revoke(task_id)

but that didn't change anything. Is revoke not implemented for SQS transport? Is there some design decision behind it or it's just a lacking feature that should be implemented by some "DeleteMessage" line of code?

Answer 1

Unless you're using RabbitMQ, it's better to come up with a custom solution for revoking tasks. Eg instead of executing tasks, build a system of two components: scheduler task that scans your table of potential tasks and executes them when time comes. No need to revoke, you just can decide not to execute task when needed.