Class: HerokuMongoWatcher::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/heroku_mongo_watcher/cli.rb

Class Method Summary collapse

Class Method Details

.autoscale ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 80

def self.autoscale
  new_dyno_level = autoscaler.scale(@current_row)
  if new_dyno_level
    puts "! Scaling -> #{new_dyno_level}"
    mailer.notify(@current_row, "Scaling to #{new_dyno_level}")
  end
end

.autoscaler ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 18

def self.autoscaler
  HerokuMongoWatcher::Autoscaler.instance
end

.check_and_notify ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 112

def self.check_and_notify
  check_and_notify_locks
  check_and_notify_response_time
end

.config ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 10

def self.config
  HerokuMongoWatcher::Configuration.instance.config
end

.heroku ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 22

def self.heroku
  @heroku || Heroku::Client.new(config[:heroku_username], config[:heroku_password])
end

.mailer ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 14

def self.mailer
  HerokuMongoWatcher::Mailer.instance
end

.periodicly_capture_heroku_ps ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 88

def self.periodicly_capture_heroku_ps
  while true do
    results = heroku.ps(config[:heroku_appname])
    dynos = results.select { |ps| ps['process'] =~ /^web./ && ps['state'] == 'up' }.count

    @mutex.synchronize { @current_row.dynos = dynos }
    sleep(30)
  end
end

.tail_and_process_heroku ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 98

def self.tail_and_process_heroku
  heroku.read_logs(config[:heroku_appname], ['tail=1']) do |chunk|
    unless chunk.empty?
      chunk.split("\n").each do |line|
        @mutex.synchronize do
          @current_row.process_heroku_router_line(line) if line.include? 'heroku[router]'
          @current_row.process_heroku_web_line(line) if line.include? 'app[web'
        end
      end
    end

  end
end

.watch ⇒ Object 



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# File 'lib/heroku_mongo_watcher/cli.rb', line 26

def self.watch
  Thread.abort_on_exception = true

  # lock warnings flags
  @lock_critical_notified = false
  @lock_warning_notified = false

  # average response time warning flags
  @art_critical_notified = false
  @art_warning_notified = false

  @current_row = HerokuMongoWatcher::DataRow.new
  @last_row = HerokuMongoWatcher::DataRow.new

  @mutex = Mutex.new

  # Let people know that its on, and confirm emails are being received
  mailer.notify(@current_row, "Mongo Watcher enabled!")

  # Call Tails heroku logs updates counts
  heroku_watcher = Thread.new('heroku_logs') { tail_and_process_heroku }

  # Call Heroku PS to check the number of up dynos
  heroku_ps = Thread.new('heroku_ps') { periodicly_capture_heroku_ps }

  HerokuMongoWatcher::DataRow.print_header

  IO.popen("mongostat --rowcount 0 #{config[:interval]} --host #{config[:mongo_host]} --username #{config[:mongo_username]} --password #{config[:mongo_password]} --noheaders") do |f|
    while line = f.gets
      next unless line =~ /^/ && !(line =~ /^connected/)
      @mutex.synchronize do
        @current_row.process_mongo_line(line)

        @current_row.print_row

        check_and_notify

        autoscale if config[:autoscale]

        @last_row = @current_row
        @current_row = HerokuMongoWatcher::DataRow.new
        @current_row.dynos = @last_row.dynos

      end
    end
  end

  heroku_watcher.join
  heroku_ps.join

rescue Interrupt
  puts "\nexiting ..."
end