Class: Shoryuken::Fetcher

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/shoryuken/fetcher.rb

Overview

Fetches messages from SQS queues. Handles message retrieval with automatic retry on connectivity errors.

Constant Summary collapse

FETCH_LIMIT =

Maximum number of messages that can be fetched in a single SQS request

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Instance Method Summary collapse

Methods included from Util

#elapsed, #fire_event, #logger, #unparse_queues, #worker_name

Constructor Details

#initialize(group) ⇒ Fetcher

Initializes a new Fetcher for a processing group

Parameters:

  • group (String) —

    the processing group name



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# File 'lib/shoryuken/fetcher.rb', line 15

def initialize(group)
  @group = group
end

Instance Method Details

#fetch(queue, limit) ⇒ Array<Aws::SQS::Types::Message>

Fetches messages from a queue with automatic retry

Parameters:

Returns:

  • (Array<Aws::SQS::Types::Message>) —

    the fetched messages



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# File 'lib/shoryuken/fetcher.rb', line 24

def fetch(queue, limit)
  fetch_with_auto_retry(3) do
    started_at = Time.now

    logger.debug { "Looking for new messages in #{queue}" }

    sqs_msgs = Array(receive_messages(queue, limit))

    logger.debug { "Found #{sqs_msgs.size} messages for #{queue.name}" } unless sqs_msgs.empty?
    logger.debug { "Fetcher for #{queue} completed in #{elapsed(started_at)} ms" }

    sqs_msgs
  end
end