Очереди задач без купюр, Артем Малышев, Positive Technologies

Выступление на конференции PyCon Russia 2016

1. TASK QUEUES UNCUT МАЛЫШЕВ АРТЁМ
6. CELERY app = Celery(__name__) @app.task def add(x, y): return x + y add.delay(1, 2)
7. RQ def add(x, y): return x + y queue = rq.Queue('default') queue.enqueue(add, 1, 2)
8. RABBITMQ QUEUES Name Ready Unacked Total celery 1 0 1
9. PAYLOAD { "task": "app.add", "args": [1, 2], "kwargs": {}, "id": "27ebcaee-444f-4379-a438-04c3b5bb0fc3", "callbacks": null, "errbacks": null, "eta": null, "expires": null, "timelimit": [null, null], "taskset": null, "chord": null, "retries": 0 }
10. REDIS QUEUES >>> KEYS * 1) "celery" >>> LRANGE celery 0 -1 1) { "properties": { "body_encoding": "base64", "delivery_info": { "exchange": "celery", "routing_key": "celery" } }, "body": "eyJ0aW1lbGltaXQiOiBbbnVsb...", "content-type": "application/json" }
11. RQ >>> SMEMBERS rq:queues 1) "rq:queue:default" >>> LRANGE rq:queue:default 0 -1 1) "be58515f-9f330470995d" >>> HGETALL rq:job:be58515f-9f330470995d 1) "status" "queued" 2) "enqueued_at" "2016-06-14T19:45:39Z" 3) "created_at" "2016-06-14T19:45:39Z" 4) "origin" "default" 5) "description" "lib.add(1, 2)" 6) "data" "\x80\x04\x95\x17\x00\x00..." 7) "timeout" "180"
12. ACCEPT TASK # celery $ celery -A myapp worker -Q queue1,queue2 # rq $ rq worker queue1 queue2
13. RABBITMQ QUEUES Name Ready Unacked Total celery 0 1 1
14. REDIS QUEUES >>> KEYS * 1) "celery" 2) "unacked" 3) "unacked_index" 4) "unacked_mutex" >>> HGETALL unacked 1) "13ce9ff2-c596-4471" "[{...}, \"celery\", \"celery\"]"
15. RQ >>> HGETALL rq:job:be58515f-9f330470995d 1) "status" "started" 2) "enqueued_at" "2016-06-14T19:45:39Z" 3) "created_at" "2016-06-14T19:45:39Z" 4) "origin" "default" 5) "description" "lib.add(1, 2)" 6) "data" "\x80\x04\x95\x17\x00..." 7) "timeout" "180" 8) "started_at" "2016-06-14T21:21:14Z" >>> ZRANGE rq:wip:default 0 -1 WITHSCORES 1) "be58515f-9f330470995d" "1465939514"
16. FRAGILE ACKNOWLEDGMENT
17. RPOPLPUSH LUA SCRIPTS
21. TASK EXECUTION # celery def trace_task(uuid, args, kwargs, request=None): R = retval = fun(*args, **kwargs) # rq class Job: def perform(self): self._result = self.func( *self.args, **self.kwargs)
22. CONCURRENCY ✓ gevent ✗ twisted ✗ tornado ✗ asyncio
28. CALLBACK app.add.apply_async((1, 2), link=app.mul.s(3)) PAYLOAD "callbacks": [ { "task": "app.mul", "args": [3], "kwargs": {}, "options": {}, "chord_size": null, "immutable": false, "subtask_type": null } ]
29. CHAINS c = chain(app.add.s(1, 2), app.add.s(3), app.mul.s(6)) c()
30. RQ DEPENDENTS job = q.enqueue(lib.add, 1, 2) delayed = q.enqueue(lib.add, 1, 2, depends_on=job) REDIS >>> SMEMBERS rq:job:1183256d-2cf952c76:dependents 1) "00b70a47-bba9051bd7da" >>> HGETALL rq:job:00b70a47-bba9051bd7da 1) "status" "deferred" 2) "dependency_id" "1183256d-2cf952c76"
31. GROUPS g = group(app.add.s(1, 2), app.mul.s(3, 4)) g()
32. CHORD ch = chord([app.add.s(1, 2), app.add.s(3, 4)]) ch(app.mul.s(5)) PAYLOAD "chord": { "task": "app.mul", "chord_size": 3, "args": [7], "kwargs": null, "options": { "task_id": "2f0f2a7f-e249828b3fc9", "reply_to": "a53cb689-85a86c447428" } }
35. Celery: Redis as a broker deprecated in 4.0 Ask Solem (@asksol) June 28, 2016 So I’m late for work, and seems like Redis as a broker is no longer deprecated :) Ask Solem (@asksol) June 28, 2016
37. THANKS PROOFIT404@GMAIL.COM