Class: InfluxDB2::FluxCsvParser

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/influxdb2/client/flux_csv_parser.rb

Overview

This class us used to construct FluxResult from CSV.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(response, stream: false, response_mode: InfluxDB2::FluxResponseMode::FULL) ⇒ FluxCsvParser

Returns a new instance of FluxCsvParser.

Parameters:

  • data (String|HTTPResponse) —

    to be parse

  • stream (Boolean) (defaults to: false) —

    set to true if the response is stream otherwise (‘string`) set `false`

  • response_mode (str) (defaults to: InfluxDB2::FluxResponseMode::FULL) —

    set the amount of metadata expected in response



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# File 'lib/influxdb2/client/flux_csv_parser.rb', line 60

def initialize(response, stream: false, response_mode: InfluxDB2::FluxResponseMode::FULL)
  @response = response
  @stream = stream
  @tables = []

  @table_index = 0
  @table_id = -1
  @start_new_table = false
  @table = nil
  @groups = []
  @parsing_state_error = false

  @closed = false
  @response_mode = response_mode
end

Instance Attribute Details

#closed ⇒ Object (readonly)

Returns the value of attribute closed.



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# File 'lib/influxdb2/client/flux_csv_parser.rb', line 76

def closed
  @closed
end

#tables ⇒ Object (readonly)

Returns the value of attribute tables.



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# File 'lib/influxdb2/client/flux_csv_parser.rb', line 76

def tables
  @tables
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/influxdb2/client/flux_csv_parser.rb', line 105

def each
  return enum_for(:each) unless block_given?

  parse do |record|
    yield record
  end

  self
ensure
  _close_connection
end

#parse ⇒ Object 



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# File 'lib/influxdb2/client/flux_csv_parser.rb', line 78

def parse
  @csv_file = CSV.new(@response.instance_of?(Net::HTTPOK) ? @response.body : @response)

  while (csv = @csv_file.shift)
    # Response has HTTP status ok, but response is error.
    next if csv.empty?

    if csv[1] == 'error' && csv[2] == 'reference'
      @parsing_state_error = true
      next
    end

    # Throw  InfluxException with error response
    if @parsing_state_error
      error = csv[1]
      reference_value = csv[2]
      raise FluxQueryError.new(error, reference_value.nil? || reference_value.empty? ? 0 : reference_value.to_i)
    end

    result = _parse_line(csv)

    yield result if @stream && result.instance_of?(InfluxDB2::FluxRecord)
  end

  self
end