twitter_handler.rb

#!/usr/bin/env /opt/sensu/embedded/bin/ruby
#
# Sensu Twitter Handler
# ===
#

require 'rubygems' if RUBY_VERSION < '1.9.0'
require 'sensu-handler'
require 'twitter'
require 'timeout'

class TwitterHandler < Sensu::Handler

# var definitions: here we define the var we're using accoss the script.

  def corte
    @event['check']['output'][0,90]
  end

  def alert
    @event['check']['output'].split(' |').first # in order to cut the message, we apply a split function and keep just the first part of the text.
  end

  def alert_load
   @event['check']['output'].split('|').first
  end

  def alert_disk
   @event['check']['output'].split(' - ').first # same point than before, but spliting with "/".
  end

  def event_name
    @event['client']['name'] + '/' + @event['check']['name']
  end

  def event_output
    @event['check']['output']
  end

# handle definition: we need to define how and what we're handling.

  def handle
    puts settings['twitter']
    puts alert_load
    puts corte

# we publish on console screen two of the var values in order to check if the script is being correctly executed so far. Debug porpouse mainly.

# now we define and assign the settings for sender account.

    settings['twitter'].each do |account|
      if @event['client']['subscriptions'].include?(account[1]["sensusub"])
        foo = Twitter::REST::Client.new do |config|
          config.consumer_key = account[1]["consumer_key"]
          config.consumer_secret = account[1]["consumer_secret"]
          config.access_token = account[1]["access_token"]
          config.access_token_secret = account[1]["access_token_secret"]
        end

      if @event['action'].eql?("resolve")

       if @event['check']['output'].eql?("Resolving on request of the API")

         foo.create_direct_message("@my_twitter_account", "RESOLVED - #{event_name}: #{corte}")

       else
          foo.create_direct_message("@my_twitter_account", "RESOLVED - #{event_name}: #{corte}")
       end

      else
         foo.create_direct_message("@my_twitter_account", "#{event_name}: #{alert}")
      end

     begin
      rescue
       foo.create_direct_message("@my_twitter_account", "There's been an error")
     end

    end

end
end
end