Class: Bosh::Monitor::Plugins::Email

Inherits:
Base
  • Object
show all
Defined in:
lib/bosh/monitor/plugins/email.rb

Constant Summary collapse

DEFAULT_INTERVAL = 
10

Instance Attribute Summary

Attributes inherited from Base

#event_kinds, #logger, #options

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Email

Returns a new instance of Email.



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# File 'lib/bosh/monitor/plugins/email.rb', line 6

def initialize(options = {})
  @queues = {}
  @lock  = Mutex.new

  if options.has_key?("interval")
    @delivery_interval = options["interval"].to_f
  else
    @delivery_interval = DEFAULT_INTERVAL
  end

  @started = false
  super
end

Instance Method Details

#process(event) ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 62

def process(event)
  @lock.synchronize do
    @queues[event.kind] ||= []
    @queues[event.kind] << event
  end
end

#process_queues ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 69

def process_queues
  logger.info("Proccessing queues...")
  @queues.each_pair do |kind, queue|
    next if queue.empty?
    logger.info("Creating email...")
    email_subject = "%s from BOSH Health Monitor" % [ pluralize(queue_size(kind), kind) ]
    email_body = ""

    @lock.synchronize do
      while event = queue.shift
        logger.info("Dequeueing...")
        email_body << event.to_plain_text << "\n"
      end
    end

    send_email_async(email_subject, email_body)
  end
end

#queue_size(kind) ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 20

def queue_size(kind)
  return 0 if @queues[kind].nil?
  @queues[kind].size
end

#recipients ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 54

def recipients
  options["recipients"]
end

#run ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 25

def run
  unless EM.reactor_running?
    logger.error("Email plugin can only be started when event loop is running")
    return false
  end

  return true if @started
  logger.info("Email plugin is running...")

  EM.add_periodic_timer(@delivery_interval) do
    begin
      process_queues
    rescue => e
      logger.error("Problem processing email queues: #{e}")
    end
  end
  @started = true
end

#send_email_async(subject, body, date = Time.now) ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 88

def send_email_async(subject, body, date = Time.now)
  started = Time.now
  logger.info("Sending email...")

  headers = {
    "From"         => smtp_options["from"],
    "To"           => recipients.join(", "),
    "Subject"      => subject,
    "Date"         => date,
    "Content-Type" => "text/plain; charset=\"iso-8859-1\""
  }

  smtp_client_options = {
    :domain   => smtp_options["domain"],
    :host     => smtp_options["host"],
    :port     => smtp_options["port"],
    :from     => smtp_options["from"],
    :to       => recipients,
    :header   => headers,
    :body     => body
  }

  if smtp_options["tls"]
    smtp_client_options[:starttls] = true
  end

  if smtp_options["auth"]
    smtp_client_options[:auth] = {
      # FIXME: EM SMTP client will only work with plain auth
      :type     => smtp_options["auth"].to_sym,
      :username => smtp_options["user"],
      :password => smtp_options["password"]
    }
  end

  email = EM::Protocols::SmtpClient.send(smtp_client_options)

  email.callback do
    logger.debug("Email sent (took #{Time.now - started} seconds)")
  end

  email.errback do |e|
    logger.error("Failed to send email: #{e}")
  end

rescue => e
  logger.error("Error sending email: #{e}")
end

#smtp_options ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 58

def smtp_options
  options["smtp"]
end

#validate_options ⇒ Object 



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# File 'lib/bosh/monitor/plugins/email.rb', line 44

def validate_options
  options.kind_of?(Hash) &&
    options["recipients"].kind_of?(Array) &&
    options["smtp"].kind_of?(Hash) &&
    options["smtp"]["host"] &&
    options["smtp"]["port"] &&
    options["smtp"]["from"] &&
    true # force the whole method to return Boolean
end