mirror of
https://github.com/ansible/awx.git
synced 2026-02-12 07:04:45 -03:30
Update function comments
This commit is contained in:
@@ -13,31 +13,9 @@ logger = logging.getLogger('awx.main.commands.run_callback_receiver')
|
||||
|
||||
class PoolWorker(object):
|
||||
"""
|
||||
Used to track a worker child process and its pending and finished messages.
|
||||
A simple wrapper around a multiprocessing.Process that tracks a worker child process.
|
||||
|
||||
This class makes use of two distinct multiprocessing.Queues to track state:
|
||||
|
||||
- self.queue: this is a queue which represents pending messages that should
|
||||
be handled by this worker process; as new AMQP messages come
|
||||
in, a pool will put() them into this queue; the child
|
||||
process that is forked will get() from this queue and handle
|
||||
received messages in an endless loop
|
||||
- self.finished: this is a queue which the worker process uses to signal
|
||||
that it has finished processing a message
|
||||
|
||||
When a message is put() onto this worker, it is tracked in
|
||||
self.managed_tasks.
|
||||
|
||||
Periodically, the worker will call .calculate_managed_tasks(), which will
|
||||
cause messages in self.finished to be removed from self.managed_tasks.
|
||||
|
||||
In this way, self.managed_tasks represents a view of the messages assigned
|
||||
to a specific process. The message at [0] is the least-recently inserted
|
||||
message, and it represents what the worker is running _right now_
|
||||
(self.current_task).
|
||||
|
||||
A worker is "busy" when it has at least one message in self.managed_tasks.
|
||||
It is "idle" when self.managed_tasks is empty.
|
||||
The worker process runs the provided target function and tracks its creation time.
|
||||
"""
|
||||
|
||||
def __init__(self, target, args, **kwargs):
|
||||
@@ -53,16 +31,12 @@ class WorkerPool(object):
|
||||
"""
|
||||
Creates a pool of forked PoolWorkers.
|
||||
|
||||
As WorkerPool.write(...) is called (generally, by a kombu consumer
|
||||
implementation when it receives an AMQP message), messages are passed to
|
||||
one of the multiprocessing Queues where some work can be done on them.
|
||||
Each worker process runs the provided target function in an isolated process.
|
||||
The pool manages spawning, tracking, and stopping worker processes.
|
||||
|
||||
pool = WorkerPool(min_workers=4) # spawn four worker processes
|
||||
pool.init_workers(MessagePrint().work_loop)
|
||||
pool.write(
|
||||
0, # preferred worker 0
|
||||
'Hello, World!'
|
||||
)
|
||||
Example:
|
||||
pool = WorkerPool(workers_num=4) # spawn four worker processes
|
||||
pool.init_workers(worker_instance.work_loop)
|
||||
"""
|
||||
|
||||
pool_cls = PoolWorker
|
||||
|
||||
Reference in New Issue
Block a user