Class: Fluent::ForwardInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_forward.rb

Defined Under Namespace

Classes: Handler, HeartbeatRequestHandler

Constant Summary

Constants included from Configurable

Configurable::CONFIG_TYPE_REGISTRY

Instance Attribute Summary

Attributes inherited from Input

#router

Attributes included from PluginLoggerMixin

#log

Instance Method Summary collapse

Methods included from PluginLoggerMixin

included

Methods included from PluginId

#plugin_id

Methods included from Configurable

#config, included, lookup_type, register_type

Constructor Details

#initialize ⇒ ForwardInput

Returns a new instance of ForwardInput.



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# File 'lib/fluent/plugin/in_forward.rb', line 28

def initialize
  super
  require 'fluent/plugin/socket_util'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_forward.rb', line 53

def configure(conf)
  super
end

#listen ⇒ Object 



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# File 'lib/fluent/plugin/in_forward.rb', line 89

def listen
  log.info "listening fluent socket on #{@bind}:#{@port}"
  s = Coolio::TCPServer.new(@bind, @port, Handler, @linger_timeout, log, method(:on_message))
  s.listen(@backlog) unless @backlog.nil?
  s
end

#run ⇒ Object

config_param :path, :string, :default => DEFAULT_SOCKET_PATH def listen

if File.exist?(@path)
  File.unlink(@path)
end
FileUtils.mkdir_p File.dirname(@path)
log.debug "listening fluent socket on #{@path}"
Coolio::UNIXServer.new(@path, Handler, method(:on_message))

end



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# File 'lib/fluent/plugin/in_forward.rb', line 106

def run
  @loop.run(@blocking_timeout)
rescue => e
  log.error "unexpected error", error: e, error_class: e.class
  log.error_backtrace
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/in_forward.rb', line 72

def shutdown
  # In test cases it occasionally appeared that when detaching a watcher, another watcher is also detached.
  # In the case in the iteration of watchers, a watcher that has been already detached is intended to be detached
  # and therfore RuntimeError occurs saying that it is not attached to a loop.
  # It occures only when testing for sending responses to ForwardOutput.
  # Sending responses needs to write the socket that is previously used only to read
  # and a handler has 2 watchers that is used to read and to write.
  # This problem occurs possibly because those watchers are thought to be related to each other
  # and when detaching one of them the other is also detached for some reasons.
  # As a workaround, check if watchers are attached before detaching them.
  @loop.watchers.each {|w| w.detach if w.attached? }
  @loop.stop
  @usock.close
  @thread.join
  @lsock.close
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_forward.rb', line 57

def start
  @loop = Coolio::Loop.new

  @lsock = listen
  @loop.attach(@lsock)

  @usock = SocketUtil.create_udp_socket(@bind)
  @usock.bind(@bind, @port)
  @usock.fcntl(Fcntl::F_SETFL, Fcntl::O_NONBLOCK)
  @hbr = HeartbeatRequestHandler.new(@usock, method(:on_heartbeat_request))
  @loop.attach(@hbr)

  @thread = Thread.new(&method(:run))
end