Class: Riemann::Tools::RiemannClientWrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/riemann/tools/riemann_client_wrapper.rb

Constant Summary collapse

BACKOFF_TMIN =

Minimum delay between reconnection attempts

0.5
BACKOFF_TMAX =

Maximum delay

30.0
BACKOFF_FACTOR = 
2

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ RiemannClientWrapper

Returns a new instance of RiemannClientWrapper.



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# File 'lib/riemann/tools/riemann_client_wrapper.rb', line 16

def initialize(options)
  @options = options

  @queue = Queue.new
  @max_bulk_size = 1000
  @draining = false

  @worker = Thread.new do
    Thread.current.abort_on_exception = true
    backoff_delay = BACKOFF_TMIN

    loop do
      events = []

      events << @queue.pop
      events << @queue.pop while !@queue.empty? && events.size < @max_bulk_size

      client.bulk_send(events)
      backoff_delay = BACKOFF_TMIN
    rescue StandardError => e
      sleep(backoff_delay)

      dropped_count = events.size + @queue.size
      @queue.clear
      warn "Dropped #{dropped_count} event#{'s' if dropped_count > 1} due to #{e}"

      backoff_delay *= BACKOFF_FACTOR
      backoff_delay = BACKOFF_TMAX if backoff_delay > BACKOFF_TMAX
    end
  end

  at_exit { drain }
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/riemann/tools/riemann_client_wrapper.rb', line 10

def options
  @options
end

Instance Method Details

#<<(event) ⇒ Object 



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# File 'lib/riemann/tools/riemann_client_wrapper.rb', line 71

def <<(event)
  raise('Cannot queue events when draining') if @draining

  @queue << event
end

#client ⇒ Object 



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# File 'lib/riemann/tools/riemann_client_wrapper.rb', line 50

def client
  @client ||= begin
    r = Riemann::Client.new(
      host: options[:host],
      port: options[:port],
      timeout: options[:timeout],
      ssl: options[:tls],
      key_file: options[:tls_key],
      cert_file: options[:tls_cert],
      ca_file: options[:tls_ca_cert],
      ssl_verify: options[:tls_verify],
    )

    if options[:tcp] || options[:tls]
      r.tcp
    else
      r
    end
  end
end

#drain ⇒ Object 



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# File 'lib/riemann/tools/riemann_client_wrapper.rb', line 77

def drain
  @draining = true
  sleep(1) until @queue.empty? || @worker.stop?
end