I am currently working on Quartz Scheduler (version 1.4.2). I am trying to code scheduler in such a way so that I can set Repeat Interval duration after starting the scheduler. I tried many ways to do it but its not working. Can anyone tell me how can we adjust the Repeat Interval Duration during runtime.
Thanks in advance.
You'll need to unschedule the current job first, then reschedule it with the new interval value. Put a form in your GUI to use to set the new interval value at runtime, you can process the rescheduling when the value gets updated.
See this answer for an example using CronTrigger. The details will vary slightly for an Interval job, but it should be enough to get you going.
Related
there is a "natural" ( I mean thought parameter) way to limit the number of triggering a dag (let say every 24 hours).
I don't want to schedule it, but some user can trigger the same dag multiple time, and for resources and others reason, I want it only once .
As I see "depends_on_past" depend only against the previous run, but it could be many time a day.
Thx
Not directly, but you could likely implement task_instance_mutation_hook in the first task of the DAG, it could then immediately fail the task if you check if it's been run several times the same day.
https://airflow.apache.org/docs/apache-airflow/stable/concepts/cluster-policies.html#task-instance-mutation
I'm looking for an option in autosys to send an alert if the dependant jobs don't start within 10 min of the avg run time, for example, the last 30 days. The dependant jobs, do not have a fixed starting condition. They might have run at varying times in the last 30 days based on the completion of starting jobs. Would it be possible in autosys, to dynamically set the must start time for the jobs which don't have starting time rather they are dependant on starting conditions?
I use something like this in my critical jobs. You can try them too, if you want :
must_start_times: "19:01"
days_of_week: mo,tu,we,th,fr,sa,su
start_times: "19:00"
I am using a batch process and i want it to run at a specific cron scheduled time. However, the job is getting triggered at the start up and again triggering at the scheduled time. I am trying to avoid the former however failing to do so. This is a sample repository which reproduces the same issue: https://github.com/ppanigrahi02/BatchJobWithScheduler. i am using the spring guide example https://github.com/spring-guides/gs-batch-processing and added a scheduler on top of it. I will really appreciate any leads.
The #Scheduled annotation used here will start the job immediately at startup and every 600000 milliseconds. If you want to specify an initial delay to wait before the first execution, you can use the initialDelay attribute of the annotation, something like:
#Scheduled(initialDelay = 600000, fixedRate = 600000)
Another option is to use the cron attribute and provide a cron expression. For more details about this annotation, you can check the reference documentation here: https://docs.spring.io/spring/docs/5.0.3.RELEASE/spring-framework-reference/integration.html#scheduling-annotation-support-scheduled
I need to create schedulers to execute jobs(class files) at specified intervals..For Now, I'm using Quartz Scheduler which triggers the jobs at defined intervals from the time of triggering of it.
For Eg: Consider I'm giving a cron expression to run for every one hour starting at morning 9.My first run will be at 9 and my second run will be at 10 and so on.
If my job is taking 20 minutes to execute then in that case this method is not that much efficient.
What I need to do is to schedule a job for every one hour from the completion time of the previously ran job
For Eg: Consider my job to run every one hour is triggered at 9 and for the first run it took 20 minutes to run, so for the next time the job should trigger only at 10:20 instead of 10 (ie., one hour from the completion of previous ran job)
I need to know whether there are any methods in Quartz Scheduling to achieve this or any other logic I need to do.
If anyone could help me out on this,it would be very helpful for me.
You can easily achieve this by job-chaining your job executions. There are various approaches you can choose from:
(1) Implement a Quartz JobListener and in its jobWasExecuted method, that is invoked by Quartz whenever a job finishes executing, re-fire your job.
(2) Look at the Quartz JobChainingJobListener that you can use to implement simple job chaining scenarios. Please note that the functionality of this listener is very limited as it does not allow you to insert delays between job executions, there is no support for conditions that must be met before target jobs are executed etc. But you can use it as a good starting point to implement (1).
(3) Use QuartzDesk (our commercial product) or any other product that allows you to create job chains while externalizing and managing all job dependencies outside of your application. A job chain can have multiple target jobs that can be executed immediately, with a fixed delay or at arbitrary time in the future produced by a JavaScript expression. It also allows you to implement somewhat more sophisticated works flows, such as firing a target job when multiple source jobs complete their execution etc. I am attaching screenshots showing you what a simple job chain that re-executes Job1 with a 1 minute delay upon Job1's completion (with any job execution status) looks like:
I have number of monitoring functions that I want to execute with dynamic frequencies, depending on project. The range of frequencies are from once every second, to once a day. TaskScheduler or ScheduledJob are not precise enough for this purpose.
Is any function scheduler such as this available?
Spinning up a powershell instance is not a trivial event. If you're wanting monitoring on a frequency less than a few minutes you'll be much better off to write a script that stays resident and runs in an endless process-sleep-process loop.
I created script for this purpose that you can find on github