Basic queue handling

Question

Question

Eduard Lebedyuk · Feb 17, 2016

Let's say the user need to execute some heavy code (build a report, or extensive calculations etc.). So, of course it needs to be asynchronous, and we possibly need to store some data about execution status. How?

If it's not user action, but periodic action, Task Manager could be used (RunLegacyTask or Custom task).

If it's an often encountered workflow, then it's Ensemble.

But what about Caché?

I know about job and %SYSTEM.Event class, and I'm interested in different approaches (and code samples) to basic queue handling.

Discussion (6)1

Log in or sign up to continue

Alberto Fuentes · Feb 22, 2016

Hi Eduard,

I've just published the PubSub example in GitHub:

https://github.com/intersystems-ib/cache-iat-pubsub

Queue handling can be an interesting topic. There are several concepts that be discussed like using $system.Events or $sytem.Semaphore (network support), transactions, etc.

0 0

score 1 · Answer 1 · 2016-02-17T08:02:34-05:00

Take a look at the work queue manager. Tom posted a thread here:

https://community.intersystems.com/post/using-work-queue-manager-process-data-multiple-cores

In Zen applications, you can make use of asynchronous background tasks, but you can only observe one task at a time.

score 0 · Answer 2 · 2016-02-17T10:32:45-05:00

Eduard Lebedyuk · Feb 17, 2016

Thank you.

0 0

score 2 · Answer 3 · 2016-02-19T05:56:07-05:00

Hi Eduard,

I have some $system.Event examples. Have a look at:

https://community.intersystems.com/post/simple-systemevent-examples

Also, I've just uploaded a very basic WorkMgr example:

https://community.intersystems.com/post/simple-workmgr-example

Depending on what you are trying to achieve you could go one way or the other, or maybe combine them.

score 0 · Answer 4 · 2016-02-19T07:42:55-05:00

Have you thought about uploading this projects on GitHub?

UPD. Nevermind, seen your message about GitHub in another topic.

score 0 · Answer 5 · 2016-02-19T08:21:08-05:00

Eduard Lebedyuk · Feb 19, 2016

Reading it now. Intresting. Thank you.

_____

LLL

0 0