Class: Fluent::ZmqSubInput

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ZmqSubInput

Returns a new instance of ZmqSubInput.



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 15

def initialize
  super
  require 'ffi-rzmq'
end

Instance Attribute Details

#subkeys ⇒ Object (readonly)

Returns the value of attribute subkeys.



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 13

def subkeys
  @subkeys
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 20

def configure(conf)
  super
  @subkeys = @subkey.split(",")
  @drop_fields_arr = @drop_fields.split(",")
end

#run ⇒ Object 



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 39

def run
  begin
    @subscriber = @context.socket(ZMQ::SUB)
    @subscriber.connect(@publisher)
    @subscriber.setsockopt(ZMQ::SNDHWM, 100)
    @subscriber.setsockopt(ZMQ::RCVHWM, 100)
    if @subkeys.size > 0
      @subkeys.each do |k|
        @subscriber.setsockopt(ZMQ::SUBSCRIBE,k)
      end
    else
      @subscriber.setsockopt(ZMQ::SUBSCRIBE,'')
    end
    loop do
      msg = ''
      while @subscriber.recv_string(msg,ZMQ::DONTWAIT) && msg.size > 0
        begin
          record = JSON.parse(msg)
        rescue JSON::ParserError => e
          log.trace "Ignoring non-JSON message '#{msg}'"
          next
        rescue => e
          log.warn "Unknown error parsing JSON message.",:error_class => e.class, :error => e
          log.warn_backtrace
        end
        begin
          tag = @tag_prefix + "." + record['topic']
          time = record['timestamp']
          record.delete_if { |key, value| @drop_fields_arr.include? key}
          Engine.emit(tag, time, record)
        rescue => e
          log.warn "Error in processing message.",:error_class => e.class, :error => e
          log.warn_backtrace
        end
        msg = ''
      end
      sleep(0.1)
    end
  rescue => e
    log.error "error occurred while executing plugin.", :error_class => e.class, :error => e
    log.warn_backtrace
  ensure
    if @subscriber
      @subscriber.close
    end
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 32

def shutdown
  Thread.kill(@thread)
  @thread.join
  @context.terminate
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_fedmsg.rb', line 26

def start
  super
  @context =ZMQ::Context.new()
  @thread = Thread.new(&method(:run))
end