Module: LogStash::Outputs::RabbitMQ::BunnyImpl

Included in:
LogStash::Outputs::RabbitMQ
Defined in:
lib/logstash/outputs/rabbitmq/bunny.rb

Instance Method Summary collapse

Instance Method Details

#connect ⇒ Object

Implementation



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 75

def connect
  @vhost       ||= Bunny::DEFAULT_HOST
  # 5672. Will be switched to 5671 by Bunny if TLS is enabled.
  @port        ||= AMQ::Protocol::DEFAULT_PORT
  @routing_key ||= "#"

  @settings = {
    :vhost => @vhost,
    :host  => @host,
    :port  => @port,
    :automatically_recover => false
  }
  @settings[:user]      = @user || Bunny::DEFAULT_USER
  @settings[:pass]      = if @password
                            @password.value
                          else
                            Bunny::DEFAULT_PASSWORD
                          end

  @settings[:log_level] = if @debug || @logger.debug?
                            :debug
                          else
                            :error
                          end

  @settings[:tls]        = @ssl if @ssl
  @settings[:verify_ssl] = @verify_ssl if @verify_ssl

  proto                  = if @ssl
                             "amqp"
                           else
                             "amqps"
                           end
  @connection_url        = "#{proto}://#{@user}@#{@host}:#{@port}#{vhost}/#{@queue}"

  begin
    @conn = Bunny.new(@settings)

    @logger.debug("Connecting to RabbitMQ. Settings: #{@settings.inspect}, queue: #{@queue.inspect}")
    return if terminating?
    @conn.start

    @ch = @conn.create_channel
    @logger.info("Connected to RabbitMQ at #{@settings[:host]}")
  rescue Bunny::NetworkFailure, Bunny::ConnectionClosedError, Bunny::ConnectionLevelException, Bunny::TCPConnectionFailed => e
    n = Bunny::Session::DEFAULT_NETWORK_RECOVERY_INTERVAL * 2

    @logger.error("RabbitMQ connection error: #{e.message}. Will attempt to reconnect in #{n} seconds...",
                  :exception => e,
                  :backtrace => e.backtrace)
    return if terminating?

    sleep n
    retry
  end
end

#declare_exchange ⇒ Object 



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 132

def declare_exchange
  @logger.debug("Declaring an exchange", :name => @exchange, :type => @exchange_type,
                :durable => @durable)
  @x = @ch.exchange(@exchange, :type => @exchange_type.to_sym, :durable => @durable)
end

#publish_serialized(message, key = @key) ⇒ Object 



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 36

def publish_serialized(message, key = @key)
  begin
    if @x
      @x.publish(message, :persistent => @persistent, :routing_key => key)
    else
      @logger.warn("Tried to send a message, but not connected to RabbitMQ yet.")
    end
  rescue Bunny::NetworkFailure, Bunny::ConnectionClosedError, Bunny::ConnectionLevelException, Bunny::TCPConnectionFailed => e
    n = Bunny::Session::DEFAULT_NETWORK_RECOVERY_INTERVAL * 2

    @logger.error("RabbitMQ connection error: #{e.message}. Will attempt to reconnect in #{n} seconds...",
                  :exception => e,
                  :backtrace => e.backtrace)
    return if terminating?

    sleep n
    connect
    declare_exchange
    retry
  end
end

#receive(event) ⇒ Object 



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 22

def receive(event)
  return unless output?(event)

  @logger.debug("Sending event", :destination => to_s, :event => event, :key => key)
  key = event.sprintf(@key) if @key

  begin
    publish_serialized(event.to_json, key)
  rescue LogStash::Json::GeneratorError => e
    @logger.warn("Trouble converting event to JSON", :exception => e,
                 :event => event)
  end
end

#register ⇒ Object

API



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 12

def register
  require "bunny"

  @logger.info("Registering output", :plugin => self)

  connect
  declare_exchange
end

#teardown ⇒ Object 



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 62

def teardown
  @conn.close if @conn && @conn.open?
  @conn = nil

  finished
end

#to_s ⇒ Object 



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# File 'lib/logstash/outputs/rabbitmq/bunny.rb', line 58

def to_s
  return "amqp://#{@user}@#{@host}:#{@port}#{@vhost}/#{@exchange_type}/#{@exchange}\##{@key}"
end