Class: SplitIoClient::Engine::Synchronizer

Inherits:
Object
  • Object
show all
Includes:
Cache::Fetchers, Cache::Senders
Defined in:
lib/splitclient-rb/engine/synchronizer.rb

Constant Summary collapse

ON_DEMAND_FETCH_BACKOFF_MAX_RETRIES = 
10

Instance Method Summary collapse

Constructor Details

#initialize(repositories, config, params) ⇒ Synchronizer

Returns a new instance of Synchronizer.



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 11

def initialize(
  repositories,
  config,
  params
)
  @splits_repository = repositories[:splits]
  @segments_repository = repositories[:segments]
  @impressions_repository = repositories[:impressions]
  @events_repository = repositories[:events]
  @config = config
  @split_fetcher = params[:split_fetcher]
  @segment_fetcher = params[:segment_fetcher]
  @impressions_api = params[:impressions_api]
  @impression_counter = params[:imp_counter]
  @telemetry_synchronizer = params[:telemetry_synchronizer]
  @impressions_sender_adapter = params[:impressions_sender_adapter]
  @unique_keys_tracker = params[:unique_keys_tracker]

  @splits_sync_backoff = Engine::BackOff.new(10, 0, 60)
  @segments_sync_backoff = Engine::BackOff.new(10, 0, 60)
end

Instance Method Details

#fetch_segment(name, target_change_number) ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 104

def fetch_segment(name, target_change_number)
  return if target_change_number <= @segments_repository.get_change_number(name).to_i

  fetch_options = { cache_control_headers: true, till: nil }
  result = attempt_segment_sync(name,
                                target_change_number,
                                fetch_options,
                                @config.on_demand_fetch_max_retries,
                                @config.on_demand_fetch_retry_delay_seconds,
                                false)

  attempts = @config.on_demand_fetch_max_retries - result[:remaining_attempts]
  if result[:success]
    @config.logger.debug("Segment #{name} refresh completed in #{attempts} attempts.") if @config.debug_enabled

    return
  end

  fetch_options = { cache_control_headers: true, till: target_change_number }
  result = attempt_segment_sync(name,
                                target_change_number,
                                fetch_options,
                                ON_DEMAND_FETCH_BACKOFF_MAX_RETRIES,
                                nil,
                                true)

  attempts = @config.on_demand_fetch_max_retries - result[:remaining_attempts]
  if result[:success]
    @config.logger.debug("Segment #{name} refresh completed bypassing the CDN in #{attempts} attempts.") if @config.debug_enabled
  else
    @config.logger.debug("No changes fetched for segment #{name} after #{attempts} attempts with CDN bypassed.") if @config.debug_enabled
  end
rescue StandardError => e
  @config.log_found_exception(__method__.to_s, e)
end

#fetch_splits(target_change_number) ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 66

def fetch_splits(target_change_number)
  return if target_change_number <= @splits_repository.get_change_number.to_i

  fetch_options = { cache_control_headers: true, till: nil }

  result = attempt_splits_sync(target_change_number,
                               fetch_options,
                               @config.on_demand_fetch_max_retries,
                               @config.on_demand_fetch_retry_delay_seconds,
                               false)

  attempts = @config.on_demand_fetch_max_retries - result[:remaining_attempts]
  if result[:success]
    @segment_fetcher.fetch_segments_if_not_exists(result[:segment_names], true) unless result[:segment_names].empty?
    @config.logger.debug("Refresh completed in #{attempts} attempts.") if @config.debug_enabled

    return
  end

  fetch_options[:till] = target_change_number
  result = attempt_splits_sync(target_change_number,
                               fetch_options,
                               ON_DEMAND_FETCH_BACKOFF_MAX_RETRIES,
                               nil,
                               true)

  attempts = ON_DEMAND_FETCH_BACKOFF_MAX_RETRIES - result[:remaining_attempts]

  if result[:success]
    @segment_fetcher.fetch_segments_if_not_exists(result[:segment_names], true) unless result[:segment_names].empty?
    @config.logger.debug("Refresh completed bypassing the CDN in #{attempts} attempts.") if @config.debug_enabled
  else
    @config.logger.debug("No changes fetched after #{attempts} attempts with CDN bypassed.") if @config.debug_enabled
  end
rescue StandardError => e
  @config.log_found_exception(__method__.to_s, e)
end

#start_periodic_data_recording ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 45

def start_periodic_data_recording
  unless @config.consumer?
    impressions_sender
    events_sender
    start_telemetry_sync_task
  end
  
  impressions_count_sender
  start_unique_keys_tracker_task
end

#start_periodic_fetch ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 56

def start_periodic_fetch
  @split_fetcher.call
  @segment_fetcher.call
end

#stop_periodic_fetch ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 61

def stop_periodic_fetch
  @split_fetcher.stop_splits_thread
  @segment_fetcher.stop_segments_thread
end

#sync_all(asynchronous = true) ⇒ Object 



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# File 'lib/splitclient-rb/engine/synchronizer.rb', line 33

def sync_all(asynchronous = true)
  unless asynchronous
    return sync_splits_and_segments
  end

  @config.threads[:sync_all_thread] = Thread.new do
    sync_splits_and_segments
  end

  true
end