How to create a scheduled event to execute a specific job?

[fabiensebban]

I created a scheduled event in the template.yaml file but I don't know how to tell the schedule to run a specific job.
Someone knows how?

Here is the schedule I added to the Job resources:

ScheduledEvent:
  Type: Schedule
  Properties:
    Schedule: cron(*/1 * * * ? *)
    Enabled: True

[metaskills]

YO! Sorry for the delayed response. Did you find an answer to your question? What you have above looks fine. Assuming you added that under the Events: property?

Maybe too I should change this to a yes or maybe? https://github.com/customink/lambdakiq#common-questions

[fabiensebban]

Hey! It's OK. Thank you for your reply.
I did this in my app.rb file:

ENV['RAILS_SERVE_STATIC_FILES'] = '1'
require_relative 'config/boot'
require 'dotenv' ; Dotenv.load ".env.#{ENV['RAILS_ENV']}"
require 'lamby'
require_relative 'config/application'
require_relative 'config/environment'

$app = Rack::Builder.new { run Rails.application }.to_app

def handler(event:, context:)
  if event['job_name']
    Object.const_get(event['job_name']).perform_later
  elsif Lambdakiq.jobs?(event)
    Lambdakiq.handler(event)
  else
    Lamby.handler $app, event, context, rack: :http
  end
end

And I created a schedule event adding this in template.yml under JobLambda -> Properties -> Events:

ScheduledEvent:
  Type: Schedule
  Properties:
    DeadLetterConfig: 
      Arn: !GetAtt JobsDLQueue.Arn
    Input: '{"job_name": "TheCronJob"}'
    Schedule: cron(*/1 * * * ? *)
    Enabled: True

It seems to work but I feel like it is not the correct way to get the job done. I will tell you if I find another way.

[metaskills]

That actually looks good to me!

[fabiensebban]

Hi again @metaskills :)
I am facing the same issue right now since the new Lamby version came out. I don't have access to the old app.rb file with the new version so it is not possible to handle Scheduled Events like I used to do.

Maybe I can just change my Dockerfile so it runs this command: CMD ["app.App::Handler.process"]
And then, create my own app.rb handler like it is explained in the aws_lambda_ric gem documentation:

module App
  class Handler
    def self.process(event:, context:)
      "Hello World!"
    end
  end
end

What do you think? Is is good practice? Is there another way to run a job through Scheduled Events?

[fabiensebban]

I just tested this approch and it seems to be working pretty good. Now I can run a scheduled event and I can event send an event to the job Lambda with the body bellow to force a specific job execution:

{
    "job_name": "MyJob"
}

[metaskills]

Cool, did you figure out your CMD could be something like this?

CMD ["config/environment.App::Handler.process"]

Or whatever method is inside your application?