Class: Fluent::ZmqSubInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_zmq_sub.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_zmq_sub.rb', line 14

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_zmq_sub.rb', line 12

def subkeys
  @subkeys
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_zmq_sub.rb', line 19

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

#run ⇒ Object 



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# File 'lib/fluent/plugin/in_zmq_sub.rb', line 37

def run
  begin
    @subscriber = @context.socket(ZMQ::SUB)
    @subscriber.connect(@publisher)
    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
          (key, records) = msg.split(" ",2)
          records = MessagePack.unpack(records)
          if @bulk_send && records[0].class == Array
            es = MultiEventStream.new
            prev_tag = nil
            records.each do |tag, time, record|
              if prev_tag && prev_tag != tag
                Engine.emit_stream(prev_tag, es)
                es = MultiEventStream.new
              end
              es.add(time, record)
              prev_tag = tag
            end
            Engine.emit_stream(prev_tag, es) if es.to_a.size > 0
          else
            Engine.emit(*records)
          end
        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_zmq_sub.rb', line 30

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

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_zmq_sub.rb', line 24

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