Tuesday, October 13, 2015
I am trying to run a ruby script from my rails controller.
The script runs successfully when the rails server is started normally as
rails s thin -e development
But when rails server is started as a daemon, the ruby script fails to run.
rails s thin -e development -d
Inside the controller the ruby script is run with the **exec** command.
script_exec = exec("ruby /Code/AttendanceReport/attn/bin/scripts/Spreadsheet_proper.rb '#{city}' '#{date1}' '#{date2}'")
The above approach kills the rails server and doesn't execute the ruby script. And hence I used
script_exec = %x{ruby /Code/AttendanceReport/attn/bin/scripts/Spreadsheet_proper.rb '#{city}' '#{date1}' '#{date2}' }
script_exec = system("ruby /Code/AttendanceReport/attn/bin/scripts/Spreadsheet_proper.rb '#{city}' '#{date1}' '#{date2}'")
The above **%x** and **system** approaches also fail when run rails server is started with -d. But it does work when the rails server is normally.
Hence I tried a different approach of using **Daemons**
In my controller
file_path1 = "/Code/AttendanceReport/attn/bin/scripts/Spreadsheet_proper_control.rb"
script_exec = %x{ruby #{file_path1} start -- #{city} #{date1} #{date2}}
The Spreadsheet_proper_control.rb has the
require 'daemons'
Daemons.run('/Code/AttendanceReport/attn/bin/scripts/Spreadsheet_proper.rb')
This approach too fails. Upon logging false value is returned for the above approach.
But when run manually from the terminal, the above Daemon approach is working perfectly.
ruby Spreadsheet_proper_control.rb start -- 'Melbourne' '2015-06-01' '2015-10-01'
The ruby script runs while I am logged into a terminal session and started rails server normally – should that terminal session end so would the server.
Concise app environment:-
- Ubuntu 14.04
- Rails version 4.2
- Ruby 2.2.2
- daemons (1.2.3)
The Spreadsheet_proper.rb generates an xls file which is then zipped and sent as response by the controller.
Since the output of the ruby script is sent by controller as a response, I couldn't go for delayed job.
Is there any other approach to run a Ruby script inside Rails controller successfully without the Rails server getting killed when started as daemon?
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