Class: PulsarSdk::Consumer::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/pulsar_sdk/consumer/base.rb

Defined Under Namespace

Classes: SeqGenerator

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client, message_tracker, opts) ⇒ Base

Returns a new instance of Base.



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# File 'lib/pulsar_sdk/consumer/base.rb', line 6

def initialize(client, message_tracker, opts)
  @opts = opts
  @topic = @opts.topic
  @message_tracker = message_tracker
  @client = client
end

Instance Attribute Details

#consumer_id ⇒ Object (readonly)

Returns the value of attribute consumer_id.



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# File 'lib/pulsar_sdk/consumer/base.rb', line 4

def consumer_id
  @consumer_id
end

#topic ⇒ Object (readonly)

Returns the value of attribute topic.



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# File 'lib/pulsar_sdk/consumer/base.rb', line 4

def topic
  @topic
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 65

def close
  base_cmd = Pulsar::Proto::BaseCommand.new(
    type: Pulsar::Proto::BaseCommand::Type::CLOSE_CONSUMER,
    close_consumer: Pulsar::Proto::CommandCloseConsumer.new(
      consumer_id: @consumer_id
    )
  )
  execute(base_cmd) unless disconnect?

  remove_handler!
end

#disconnect? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pulsar_sdk/consumer/base.rb', line 77

def disconnect?
  !@established
end

#execute(cmd) ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 81

def execute(cmd)
  write(cmd)
end

#execute_async(cmd) ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 85

def execute_async(cmd)
  write(cmd, nil, true)
end

#flow ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 35

def flow
  base_cmd = Pulsar::Proto::BaseCommand.new(
    type: Pulsar::Proto::BaseCommand::Type::FLOW,
    flow: Pulsar::Proto::CommandFlow.new(
      messagePermits: @prefetch
    )
  )

  execute(base_cmd)

  @capacity += @prefetch
end

#flow_if_need ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 60

def flow_if_need
  return if @capacity > 0 && [@prefetch / 2, 1].max.ceil < (@capacity - @fetched)
  flow
end

#grab_cnx ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 13

def grab_cnx
  @prefetch = @opts.prefetch
  @fetched = 0
  @capacity = 0

  @conn = @client.connection(*@client.lookup(@topic))
  @established = true

  @seq_generator = SeqGenerator.new(@conn.seq_generator)

  @consumer_id = @seq_generator.new_consumer_id
  @consumer_name = @opts.name
  @subscription_name = @opts.subscription_name

  result = init_consumer
  @consumer_name = result.consumerName unless result.nil?
end

#increase_fetched(n = 1) ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 31

def increase_fetched(n = 1)
  @fetched += n
end

#subscription ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 48

def subscription
  @subscription_name
end

#unsubscribe ⇒ Object 



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# File 'lib/pulsar_sdk/consumer/base.rb', line 52

def unsubscribe
  base_cmd = Pulsar::Proto::BaseCommand.new(
    type: Pulsar::Proto::BaseCommand::Type::UNSUBSCRIBE,
    unsubscribe: Pulsar::Proto::CommandUnsubscribe.new
  )
  execute_async(base_cmd)
end