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rubyvariablesrufus-scheduler

Passing variables between Rufus Scheduler jobs

Ideally I need two jobs. One to gather data from an external URL and a second to process it.

I don't want to gather the data every time I process to reduce load on the external system. The output data needs processing regularly as it's a rule engine focussed on time.

However, I'm not really sure how to pass the output array from the first scheduler to be used in the second... here's an example of what I'm trying to do...

SCHEDULER.every '10m', :first_in => 0 do |job|
url = http://sample.com
output = []
open (url) do |data|
data.each_line { |line| output.push (line) }
end

SCHEDULER.every '1m', :first_in => 0 do |job|
#Code to process output (from first scheduler)
end

Any help would be hugely appreciated!

Thanks

Solution

  • You could use a global variable (here $output) and tell the jobs to use the same mutex (here "pipe0", just a random name I chose).

    Something like:

    SCHEDULER.every '10m', mutex: 'pipe0' do |job|
  $output.concat(open('http://www.example.org').readlines)
end

SCHEDULER.every '1m', mutex: 'pipe0' do |job|
  if $output
    # do something with the output
  end
  $output = nil
end