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Monitoring the Handin Server

Problem

You use the PLT handin server to accept submissions. You want a cron job to run periodically to make sure the server is still running.

Solution

Evaluating this module tells you whether MY handin-server is still running:

(module check-handin-server mzscheme
  (require (lib "client.ss" "cp-csc43002061")
           (lib "monitor-emailer.ss" "web-server")
           (lib "monitor-poke-web-server.ss" "web-server"))
  
  (define server "jblomconts.dyndns.org")
  (define port 7981)
  (define pem-path (build-path (collection-path "cp-csc43002061") "server-cert.pem"))
  
  (with-handlers ([exn:fail? (lambda (exn) (send-email-alert  "clorents@csc.calpoly.edu" server port (exn-message exn)))])
    (handin-disconnect (handin-connect server port pem-path)))
  )

You'll need to customize it to refer to your installation of the handin-client, your server-certificate, your server, your port, and your e-mail. Ha!

Note: you could do lots better than this by actually handing something in; this script just makes the connection and then breaks it.

I have the following line in my crontab:

57 * * * * /Applications/PLT\ Scheme\ v301/bin/mzscheme -Tmv /Users/clements/bin/check-handin-server.ss

Discussion

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Contributors

-- JohnClements - 16 May 2006