Class: Harbor::LogAppenders::Email

Inherits:
Logging::Appender
  • Object
show all
Defined in:
lib/harbor/logging/appenders/email.rb

Defined Under Namespace

Classes: TrackedSubject

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(container, from, *addresses) ⇒ Email

Returns a new instance of Email.



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# File 'lib/harbor/logging/appenders/email.rb', line 8

def initialize(container, from, *addresses)
  @container = container
  @from = from
  @addresses = addresses
  @tracked_subjects = []

  # Deliver emails with exact-match subjects only every 10 Minutes
  @duplicate_subject_delivery_threshold = 60 * 10

  super("exception_notifier", :level => :error)
end

Instance Attribute Details

#duplicate_subject_delivery_threshold ⇒ Object

Returns the value of attribute duplicate_subject_delivery_threshold.



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# File 'lib/harbor/logging/appenders/email.rb', line 6

def duplicate_subject_delivery_threshold
  @duplicate_subject_delivery_threshold
end

Instance Method Details

#write(event) ⇒ Object 



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# File 'lib/harbor/logging/appenders/email.rb', line 20

def write(event)
  unless @level > event.level
    flush_expired_subjects

    data = event.data
    subject = data.split($/, 2)[0]

    if tracked_subject = @tracked_subjects.detect { |tracked_subject| tracked_subject.subject == subject }
      tracked_subject.occurances << Time.now
      
      # Don't send the email if we've already sent one within the time threshold
      return false if (Time.now - tracked_subject.sent_at) < @duplicate_subject_delivery_threshold
    else
      tracked_subject = TrackedSubject.new(subject)
      tracked_subject.occurances << Time.now

      @tracked_subjects << tracked_subject
    end

    mailer = @container.get(:mailer)
    mailer.from = @from
    mailer.to = @addresses

    data << "\n(from: #{`hostname`.chomp}, PID: #{Process.pid})"

    mailer.subject = "[ERROR] #{subject}"
    mailer["x_priority"] = "1 (Highest)"
    mailer["x_msmail_priority"] = "High"
    mailer.text = if tracked_subject.occurances.size > 1
      "Repeated #{tracked_subject.occurances.size} times since #{tracked_subject.sent_at.strftime('%Y-%m-%d %R%z')}\n\n#{data}"
    else
      data
    end
    mailer.send!

    tracked_subject.occurances.clear
    tracked_subject.sent_at = Time.now
  end
end