Is it possible Triggering services/processes to run without a separate task?

Question

Question

Julian Matthews · Dec 21, 2023

Hi everyone.

I have a few processes where I rely on them being triggered by a schedule to run, and in the past I have relied on the following setup:

The Scheduled Task is a custom class that runs a minimal amount of code to simply create and send the specified service an Ens.Request, and equally the Service is also a custom class that simply passes the Ens.Request to the Process for it to kick the process off.

As scheduled tasks need to be configured on a per-mirror basis, I'd like to do away with it completely and simply have a service that just sends the Ens.Request to the Process based on a poll interval. This seems simple enough for tasks set to run every x minutes, but this doesn't seem to be suitable for instances where it needs to run once at a specific time.

Is there a better way for this to be set up, or is the task scheduling for this the best option?

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Luis Angel Pére... · Dec 22, 2023

Well, I did something similar to create a Firebase connector, I created my own inbound adapter and define a business services to use it, after that I configured the interval in the business service and that's all!

You can review the article that I wrote about it:

https://community.intersystems.com/post/connecting-intersystems-iris-and...

For your case the interval would be 86400 seconds to execute the inbound adapter task once each day.

If you have any doubt don't hesitate to ask me.

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score 1 · Answer 1 · 2023-12-21T06:26:17-05:00

@Julian Matthews You could try the Schedule option from Service

https://docs.intersystems.com/healthconnect20211/csp/docbook/DocBook.UI....

Also you could check the discussion here : https://community.intersystems.com/node/554071 , if that useful.

score 0 · Answer 2 · 2023-12-21T10:10:46-05:00

Hi Mary - thank you for your reply.

Unfortunately the Schedule Option isn't suitable where we need the job to run only once at a set time per day. And, our current solution is very similar to the accepted answer from Ashok Kumar, which is what I was hoping to simplify in some way.

score 0 · Answer 3 · 2023-12-21T10:30:06-05:00

"Unfortunately the Schedule Option isn't suitable where we need the job to run only once at a set time per day"

Why not? It is definitely possible to schedule to start every day at 8:00 for example using this schedule string:

START:*-*-*T08:00:00,STOP:*-*-*T08:10:00

You start a Business Service at 8:00 and stop it at 8:10 (for example).
All you need to take care is that the BS only make one call when started.

Enrico

score 0 · Answer 4 · 2023-12-28T10:18:44-05:00

We created a shell script that logs into the terminal and runs EnableConfigItem from the cron in Linux to schedule processes to run at certain times of the day.

score 0 · Answer 5 · 2024-01-05T08:07:07-05:00

Hi Julian,

As I put in a reply to the discussion that @Mary George linked to, you can easily get a Service to only run once at the start of each scheduled period by setting the CallInterval to a very large number so it never does a second call. /Mike

score 0 · Answer 6 · 2023-12-22T06:34:17-05:00

Thanks Luis.

The issue I'd have is that the clock starts on the poll interval at the point the service is started, so a restart of the server/production would then shift the time of day it tries to run, which would not be ideal if I needed a single run at a specific time of day. I might try a combination of the large poll interval and defining a schedule (based on the other responses) and see if that has the desired effect, but I may need to just concede and continue using the task manager. 🙂

score 0 · Answer 7 · 2023-12-22T07:08:11-05:00

Enrico Parisi · Dec 22, 2023

That's EXACTLY what a Schedule setting does in any Item/Business Host (Business Service in your case).

Enrico

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