Class: Nsq::Producer

Inherits:
ClientBase show all
Defined in:
lib/nsq/producer.rb

Instance Attribute Summary collapse

Attributes inherited from ClientBase

#connections

Instance Method Summary collapse

Methods inherited from ClientBase

#connected?, #terminate

Methods included from AttributeLogger

included

Constructor Details

#initialize(opts = {}) ⇒ Producer

Returns a new instance of Producer.



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# File 'lib/nsq/producer.rb', line 7

def initialize(opts = {})
  @connections = {}
  @topic = opts[:topic]
  @discovery_interval = opts[:discovery_interval] || 60

  nsqlookupds = []
  if opts[:nsqlookupd]
    nsqlookupds = [opts[:nsqlookupd]].flatten
    discover_repeatedly(
      nsqlookupds: nsqlookupds,
      interval: @discovery_interval
    )

  elsif opts[:nsqd]
    nsqds = [opts[:nsqd]].flatten
    nsqds.each{|d| add_connection(d)}

  else
    add_connection('127.0.0.1:4150')
  end

  at_exit{terminate}
end

Instance Attribute Details

#topic ⇒ Object (readonly)

Returns the value of attribute topic.



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# File 'lib/nsq/producer.rb', line 5

def topic
  @topic
end

Instance Method Details

#write(*raw_messages) ⇒ Object 



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# File 'lib/nsq/producer.rb', line 32

def write(*raw_messages)
  if !@topic
    raise 'No topic specified. Either specify a topic when instantiating the Producer or use write_to_topic.'
  end

  write_to_topic(@topic, *raw_messages)
end

#write_to_topic(topic, *raw_messages) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/nsq/producer.rb', line 41

def write_to_topic(topic, *raw_messages)
  # return error if message(s) not provided
  raise ArgumentError, 'message not provided' if raw_messages.empty?

  # stringify the messages
  messages = raw_messages.map(&:to_s)

  # get a suitable connection to write to
  connection = connection_for_write

  if messages.length > 1
    connection.mpub(topic, messages)
  else
    connection.pub(topic, messages.first)
  end
end