Class: LogCourier::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/log-courier/server.rb

Overview

Implementation of the server

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Server

Returns a new instance of Server.



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# File 'lib/log-courier/server.rb', line 36

def initialize(options = {})
  @options = {
    logger:    nil,
    transport: 'tls',
  }.merge!(options)

  @logger = @options[:logger]
  @logger['plugin'] = 'input/courier' unless @logger.nil?

  case @options[:transport]
  when 'tcp', 'tls'
    require 'log-courier/server_tcp'
    @server = ServerTcp.new(@options)
  when 'plainzmq', 'zmq'
    require 'log-courier/server_zmq'
    @server = ServerZmq.new(@options)
  else
    fail 'input/courier: \'transport\' must be tcp, tls, plainzmq or zmq'
  end

  # Grab the port back and update the logger context
  @port = @server.port
  @logger['port'] = @port unless @logger.nil?

  # Load the json adapter
  @json_adapter = MultiJson.adapter.instance
  @json_options = { raw: true }
end

Instance Attribute Details

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/log-courier/server.rb', line 34

def port
  @port
end

Instance Method Details

#run(&block) ⇒ Object 



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# File 'lib/log-courier/server.rb', line 65

def run(&block)
  # TODO: Make queue size configurable
  event_queue = EventQueue.new 1
  server_thread = nil

  begin
    server_thread = Thread.new do
      # Receive messages and process them
      @server.run do |signature, message, comm|
        case signature
        when 'PING'
          process_ping message, comm
        when 'JDAT'
          process_jdat message, comm, event_queue
        else
          if comm.peer.nil?
            @logger.warn 'Unknown message received', :from => 'unknown' unless @logger.nil?
          else
            @logger.warn 'Unknown message received', :from => comm.peer unless @logger.nil?
          end
          # Don't kill a client that sends a bad message
          # Just reject it and let it send it again, potentially to another server
          comm.send '????', ''
        end
      end
    end

    loop do
      block.call event_queue.pop
    end
  ensure
    # Signal the server thread to stop
    unless server_thread.nil?
      server_thread.raise ShutdownSignal
      server_thread.join
    end
  end
  return
end