iris-cron-task

iris-cron-task

Class to setup tasks running at schedule with cron expression.
The cron expression could be taken from cronmaker site
Thanks to Lorenzo’s Skaleze PR this works with any cron expression.

Installation with ZPM

USER>zpm “install iris-cron-task”

Installaton with importing class

Import the class into your system.

testing with docker and collaboration

Clone/git pull the repo into any local directory

$ git clone https://github.com/evshvarov/iris-cron-task.git

Open the terminal in this directory and run:

$ docker-compose build

3. Run the IRIS container with your project:

$ docker-compose up -d

Usage

Open IRIS terminal:

$ docker-compose exec iris iris session iris
USER>

Run "set ^A($I(^A))=$H" every minute:

USER>zw ##class(dc.cron.task).Start("IRIS cron task name","* * * * *","s ^A($I(^A))=$H",1,.taskId)

taskId contains the id of the task created:

USER>w taskId
1000

It will store in a global ^A the something like the following:

USER>zw ^A
^A=6
^A(1)="65732,54180"
^A(2)="65732,54240"
^A(3)="65732,54300"
^A(4)="65732,54360"
^A(5)="65732,54420"
^A(6)="65732,54480"

Run "set ^B($I(^B))=$H" every hour:

USER>zw ##class(dc.cron.task).Start("IRIS cron task name","0 * * * *","s ^B($I(^B))=$H",1,.taskId)

Run "set ^A($I(^A))=$H" every day at midnight:

USER>zw ##class(dc.cron.task).Start("IRIS cron task name","0 0 * * *","s ^C($I(^C))=$H",1,.taskId)

And you can delete the task when you don’t need it anymore.

USER>zw ##class(dc.cron.task).Kill(taskId)

Usage with python

You can use the python script to start the task from the command line.

from iris_cron import Task
if name == 'main':

# in objectscript

tid = Task.create_objectscript_task('test', '0 0 1 * * *','set ^test($h) = "test"', run_now=True)

print(tid)

# in python

task = """

import time

import iris

gref = iris.gref('testpython')

gref['time'] = time.time()

"""

tid = Task.create_python_task('test', '0 0 1 * *', task, run_now=True)

print(tid)

# get tasks

tasks = Task.get_tasks()

print(tasks)

CronMaker syntax

CronMaker syntax is also supported by using StartByCronMakerExpression method.
Example, run every Monday and Tuesday at 2:00 pm :

Set sc = ##class(dc.cron.task).StartByCronMakerExpression("The Task Name","0 0 14 ? * MON,TUE *","set ^A($I(^A))=$H",,.tid)

or you can call method Start because it uses StartByCronMakerExpression inside now.

Set sc = ##class(dc.cron.task).Start("The Task Name","0 0 14 ? * MON,TUE *","set ^A($I(^A))=$H",,.tid)

Collaboration

You are very welcome to collaborate and make changes.
Fork the repository and send Pull Request.

Below I describe how to make changes in ObjectScript part:

Prerequisites

Make sure you have git and Docker desktop installed.

This repository is ready to code in VSCode with ObjectScript plugin.
Install VSCode, Docker and ObjectScript plugin and open the folder in VSCode.
Open /src/cls/PackageSample/ObjectScript.cls class and try to make changes - it will be compiled in running IRIS docker container.

Feel free to delete PackageSample folder and place your ObjectScript classes in a form
/src/Package/Classname.cls
Read more about folder setup for InterSystems ObjectScript

The script in Installer.cls will import everything you place under /src into IRIS.

What’s inside the repository

Dockerfile

The simplest dockerfile which starts IRIS and imports code from /src folder into it.
Use the related docker-compose.yml to easily setup additional parametes like port number and where you map keys and host folders.

.vscode/settings.json

Settings file to let you immedietly code in VSCode with VSCode ObjectScript plugin)

.vscode/launch.json

Config file if you want to debug with VSCode ObjectScript

Read about all the files in this artilce