About pub-sub model

[Suman Patro]

1. Is publish-subscribe model supported in beanstalkd?
2. Can job queues be used as message queues and vice versa?.. State some of the few.
3. Can Beanstalkd be used as a message queue??

[Jens Rantil]

Hi,

Den söndag 16 augusti 2015 kl. 08:39:37 UTC+2 skrev Suman Patro:

1. Is publish-subscribe model supported in beanstalkd?

Not explicitly, however you could always have a producer put multiple copies to different tubes if it knows who the consumers are. Do note, however, that this might be considered a hack.

 

2. Can job queues be used as message queues and vice versa?.. State some of the few.

Define message queue. You could always send messages but each task will only be consumed by one worker.

 

3. Can Beanstalkd be used as a message queue??

If "message queue" is what I described in 2), then yes.

Cheers,

Jens 

[Suman patro]

Thank you so much.
But your 1st and 2nd answers conflict.
If copies can be given to multiple Consumers(1), then why a  copy can be consumed by a single consumer (2)..if u can please elaborate.
Sent from my Sony Xperia™ smartphone

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[Jens Rantil]

Hi Suman,

You can manually publish a task ones per tube (for multiple tubes). A tube can in this case be a topic. However, this smells like a hack to me and you are probably better off with something closer to a message queue.

Cheers,

Jens

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[Suman patro]

Thank you so much... Jens... Your help is highly appreciated. I'll research and try and find stuffs too

[Michael Barrow]

When you put a job into a tube, and a worker reserves it, it is the only worker that will ever see that job. There are a few exceptions, including:

1. if it fails to remove it from the tube prior to the timeout set for the job, beanstalkd will make the job available to another worker.

2. if the worker buries the job, it will remain in the tube, but in a buried state where it won't be available to be reserved without being kicked.

Implementing pub/sub using beanstalkd is possible, but will require a substantial amount of work in your codebase to implement the functionality.

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[Suman Patro]

Thanks Michael