If it does not exist, then the queue will be created.
ensure_queue(name, db = default_db(), crash_strategy = "fail")Name of the queue. If not specified or NULL, a
name is generated randomly.
Path to the database file.
What to do with crashed jobs. The default is that
they will "fail" (just like a negative acknowledgement). Another
possibility is "requeue", in which case they are requeued
immediately, potentially even multiple times. Alternatively it can be
a number, in which case they are requeued at most the specified number
of times.
The queue object.
liteq for examples
Other liteq queues: create_queue,
delete_queue, list_queues