Class: IbmAppconfigurationRubySdk::Watchdog

Inherits:
Object
  • Object
show all
Defined in:
lib/ibm_appconfiguration_ruby_sdk/websocket/watchdog.rb

Constant Summary collapse

WATCHDOG_CONFIG = 
{
  check_interval: 60,
  heartbeat_timeout: 120
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(client) ⇒ Watchdog

Returns a new instance of Watchdog.



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# File 'lib/ibm_appconfiguration_ruby_sdk/websocket/watchdog.rb', line 26

def initialize(client)
  @client = client
  @logger = IbmAppconfigurationRubySdk::Logger.instance
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/ibm_appconfiguration_ruby_sdk/websocket/watchdog.rb', line 31

def start
  if @client.connected?
    @logger.log("Watchdog timer started - monitoring heartbeat every #{WATCHDOG_CONFIG[:check_interval]}s")
  else
    @logger.log(Constants::WATCHDOG_NOT_RUNNING)
    return Thread.new {} # no-op thread
  end

  Thread.new do
    loop do
      sleep WATCHDOG_CONFIG[:check_interval]

      break unless @client.connected?

      heartbeat_age =
        Time.now - @client.last_heartbeat_at

      next unless heartbeat_age >
                  WATCHDOG_CONFIG[:heartbeat_timeout]

      @logger.log(Constants::WATCHDOG_STOPPING)
      @logger.warning(
        "Watchdog detected stale connection - no heartbeat received for " \
        "#{heartbeat_age.round(1)}s (threshold: #{WATCHDOG_CONFIG[:heartbeat_timeout]}s)"
      )

      @client.handle_disconnect("Heartbeat timeout")

      break
    end
  end
end