Module: NewRelic::Agent::AttributeProcessing

Defined in:
lib/new_relic/agent/attribute_processing.rb

Constant Summary collapse

EMPTY_HASH_STRING_LITERAL = 
'{}'.freeze
EMPTY_ARRAY_STRING_LITERAL = 
'[]'.freeze

Class Method Summary collapse

Class Method Details

.flatten_and_coerce(object, prefix = nil, result = {}, &blk) ⇒ Object 



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# File 'lib/new_relic/agent/attribute_processing.rb', line 13

def flatten_and_coerce(object, prefix = nil, result = {}, &blk)
  if object.is_a?(Hash)
    flatten_and_coerce_hash(object, prefix, result, &blk)
  elsif object.is_a?(Array)
    flatten_and_coerce_array(object, prefix, result, &blk)
  elsif prefix
    val = Coerce.scalar(object)
    if blk
      yield(prefix, val)
    elsif !val.nil?
      result[prefix] = val
    end
  else
    NewRelic::Agent.logger.warn("Unexpected object: #{object.inspect} with nil prefix passed to NewRelic::Agent::AttributeProcessing.flatten_and_coerce")
  end
  result
end

.flatten_and_coerce_array(array, prefix, result, &blk) ⇒ Object 



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# File 'lib/new_relic/agent/attribute_processing.rb', line 46

def flatten_and_coerce_array(array, prefix, result, &blk)
  if array.empty?
    if blk
      yield(prefix, EMPTY_ARRAY_STRING_LITERAL)
    else
      result[prefix] = EMPTY_ARRAY_STRING_LITERAL
    end
  else
    array.each_with_index do |val, idx|
      next_prefix = prefix ? "#{prefix}.#{idx}" : idx.to_s
      flatten_and_coerce(val, next_prefix, result, &blk)
    end
  end
end

.flatten_and_coerce_hash(hash, prefix, result, &blk) ⇒ Object 



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# File 'lib/new_relic/agent/attribute_processing.rb', line 31

def flatten_and_coerce_hash(hash, prefix, result, &blk)
  if hash.empty?
    if blk
      yield(prefix, EMPTY_HASH_STRING_LITERAL)
    else
      result[prefix] = EMPTY_HASH_STRING_LITERAL
    end
  else
    hash.each do |key, val|
      next_prefix = prefix ? "#{prefix}.#{key}" : key.to_s
      flatten_and_coerce(val, next_prefix, result, &blk)
    end
  end
end