Class: Rightscale::Rackspace::HttpErrorHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/rackspace_base.rb

Overview

:nodoc:

Constant Summary collapse

REAUTHENTICATE_ON =

Receiving these codes we have to reauthenticate at Rackspace

['401']
SKIP_LOGGING_ON =

SKIP_LOGGING_ON = [‘404’]

[]
@@reiteration_start_delay = 
0.2
@@reiteration_time = 
5

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(handle, params = {}) ⇒ HttpErrorHandler

params:

:reiteration_time
:errors_list



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# File 'lib/rackspace_base.rb', line 463

def initialize(handle, params={}) #:nodoc:
  @handle        = handle           # Link to RightEc2 | RightSqs | RightS3 instance
  @started_at    = Time.now
  @stop_at       = @started_at  + (params[:reiteration_time] || @@reiteration_time)
  @errors_list   = params[:errors_list] || []
  @reiteration_delay = @@reiteration_start_delay
  @retries       = 0
end

Class Method Details

.extract_error_description(response, verbose = false) ⇒ Object

Format a response error message.



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# File 'lib/rackspace_base.rb', line 443

def self.extract_error_description(response, verbose=false) #:nodoc:
  message = nil
  Interface::bench.parser.add! do
    message = begin
                if response.body[/^<!DOCTYPE HTML PUBLIC/] then response.message
                else
                  JSON::parse(response.body).to_a.map do |k,v|
                    "#{k}: #{v['message']}" + (verbose ? "\n#{v['details']}" : "")
                  end.join("\n")
                end
              rescue
                response.message
              end
  end
  "#{response.code}: #{message}"
end

.reiteration_start_delay ⇒ Object 



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# File 'lib/rackspace_base.rb', line 428

def self.reiteration_start_delay
  @@reiteration_start_delay
end

.reiteration_start_delay=(reiteration_start_delay) ⇒ Object 



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# File 'lib/rackspace_base.rb', line 431

def self.reiteration_start_delay=(reiteration_start_delay)
  @@reiteration_start_delay = reiteration_start_delay
end

.reiteration_time ⇒ Object 



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# File 'lib/rackspace_base.rb', line 435

def self.reiteration_time
  @@reiteration_time
end

.reiteration_time=(reiteration_time) ⇒ Object 



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# File 'lib/rackspace_base.rb', line 438

def self.reiteration_time=(reiteration_time)
  @@reiteration_time = reiteration_time
end

Instance Method Details

#check(request_hash) ⇒ Object

Process errored response



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# File 'lib/rackspace_base.rb', line 473

def check(request_hash)  #:nodoc:
  result      = nil
  error_found = false
  response    = @handle.last_response
  error_message = @handle.last_error
  # Log the error
  logger = @handle.logger
  unless SKIP_LOGGING_ON.include?(response.code)
    logger.warn("##### #{@handle.class.name} returned an error: #{error_message} #####")
    logger.warn("##### #{@handle.class.name} request: #{request_hash[:server]}:#{request_hash[:port]}#{request_hash[:request].path} ####")
  end
  # now - check the error
  @errors_list.each do |error_to_find|
    if error_message[/#{error_to_find}/i]
      error_found = error_to_find
      logger.warn("##### Retry is needed, error pattern match: #{error_to_find} #####")
      break
    end
  end
  # yep, we know this error and have to do a retry when it comes
  if error_found || REAUTHENTICATE_ON.include?(@handle.last_response.code)
    # check the time has gone from the first error come
    # Close the connection to the server and recreate a new one.
    # It may have a chance that one server is a semi-down and reconnection
    # will help us to connect to the other server
    if (Time.now < @stop_at)
      @retries += 1
      @handle.logger.warn("##### Retry ##{@retries} is being performed. Sleeping for #{@reiteration_delay} sec. Whole time: #{Time.now-@started_at} sec ####")
      sleep @reiteration_delay
      @reiteration_delay *= 2
      # Always make sure that the fp is set to point to the beginning(?)
      # of the File/IO. TODO: it assumes that offset is 0, which is bad.
      if request_hash[:request].body_stream && request_hash[:request].body_stream.respond_to?(:pos)
        begin
          request_hash[:request].body_stream.pos = 0
        rescue Exception => e
          logger.warn("Retry may fail due to unable to reset the file pointer -- #{self.class.name} : #{e.inspect}")
        end
      end
      # Oops it seems we have been asked about reauthentication..
      if REAUTHENTICATE_ON.include?(@handle.last_response.code)
        @handle.authenticate
        @handle.request_info(request_hash)
      end
      # Make another try
      result = @handle.request_info(request_hash)
    else
      logger.warn("##### Ooops, time is over... ####")
    end
  end
  result
end