Module: UU::OS::QoS::QoSHandler

Extended by:
QoSHandler
Included in:
QoSHandler
Defined in:
uu_os_framework-0.29.16/lib/uu/os/qos/qos_handler.rb

Overview

QoS handler component.

Class Method Summary (collapse)

Instance Method Summary (collapse)

Class Method Details

+ (Numeric) default_max_client_timeout

Returns default maximum client timeout (this timeout is used in case no timeout is found in configuration file.

Returns:

  • (Numeric) —

    Default maximum client timeout



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# File 'uu_os_framework-0.29.16/lib/uu/os/qos/qos_handler.rb', line 33

def self.default_max_client_timeout
  if !Thread.current[@@MAX_TIMEOUT_PARAM]
    QoSHandler.default_max_client_timeout=@@DEFAULT_MAX_TIMEOUT
  end
  Thread.current[@@MAX_TIMEOUT_PARAM]
end

+ (Object) default_max_client_timeout=(max_client_timeout)

Stores default maximum client timeout (this timeout is used in case no timeout is found in the configuration file.

Parameters:

  • max_client_timeout (Numeric) —

    Default maximum client timeout



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# File 'uu_os_framework-0.29.16/lib/uu/os/qos/qos_handler.rb', line 44

def self.default_max_client_timeout=(max_client_timeout)
  Thread.current[@@MAX_TIMEOUT_PARAM] = max_client_timeout
end

Instance Method Details

- (Object) auto_retry(&block)

Automatically wait for QoSHandler renewal.

Parameters:

  • block (Proc) —

    Block of code to execute



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# File 'uu_os_framework-0.29.16/lib/uu/os/qos/qos_handler.rb', line 51

def auto_retry(&block)
  # Load configuration uu.QoSHandler.max-client-timeout (in minutes)
  remainingTime = QoSHandler.default_max_client_timeout
  begin
    propt = Environment.load_configuration(@@CFG_FILE_PATH)
    remainingTime = propt[@@MAX_TIMEOUT_PARAM].to_i * 60 # seconds
  rescue
    # No problem, we will use default value
  end
  infiniteTimeout = (remainingTime < 0)
  while true do
    begin
      block.call
      break
    rescue QoSLimitException => e
      params = e.messages[0].params
      wait = (params[(params.size - 1)].to_i / 1000.0).to_i # value in exception is millis
      remainingTime -= wait
      if (!infiniteTimeout) && (remainingTime < 0)
        # Wait will exceed the maximum given time - throw QoSHandler limit exception
        raise e
      end
      @@log.warning('QoS limit exceeded. Waiting %s minutes for next attempt.', nil, wait / 60.0)
      sleep (wait)
    end
  end
end