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So I worked on the CakePHP plugin for Prowl a bit more, and in doing so, I created shell-based access to the plugin. I can now send Prowl messages from the console (i.e.: I can run PHP via cron to check on things and send myself the results, if necessary). A shell task I created was for server load, as a followup to my previous post. In working this out, I've modified the output for CakePHP's Shell::out() method so that it auto-wraps and indents a bit more nicely (my ticket in the LighthouseApp is here). Time for some output examples:

Issuing the Load Alert help call: cake prowl load_alert help
--------------------------------------------------------------- CakePHP Prowl Load Alert Console Task Usage: cake prowl load_alert <params values> <args> Description: This task tests the current server load and issues a Prowl message (if required) to the passed parameter list of Prowl APIs indicating the server load. --------------------------------------------------------------- Parameters: -silent <false> Commands: help Shows this help message. Arguments: apikey Up to 5 comma separated Prowl API keys

Sending a message is as simple as: cake prowl msg [apikey] ... it can get as advanced as cake prowl msg [apikey] [priority] [application] [event] [description]

The output for running the load alert command?
Checking for high server load... Server load: 4.81 5.25 6.44 Server is running with an acceptable load.
If it's above my arbitrarily set values, it'll send a different warning depending on the level to my Prowl-enabled device. By sending a "-silent 1" parameter to the command message, output is disabled (perfect for cron).

Please note that I don't have any styling for shell output (something I'll have to fix) so the pasted character spacing and newlines won't work as expected in my example output.