module NewRelic::Coerce

We really don't want to send bad values to the collector, and it doesn't accept types like Rational that have occasionally slipped into our data.

These methods are intended to safely coerce things into the form we want, to provide documentation of expected types on to_collector_array methods, and to log failures if totally invalid data gets into outgoing data

Public Instance Methods

float(value, context=nil) click to toggle source
# File lib/new_relic/coerce.rb, line 29
def float(value, context=nil)
  result = Float(value)
  raise "Value #{result.inspect} is not finite." unless result.finite?
  result
rescue => error
  log_failure(value, Float, context, error)
  0.0
end
int(value, context=nil) click to toggle source
# File lib/new_relic/coerce.rb, line 14
def int(value, context=nil)
  Integer(value)
rescue => error
  log_failure(value, Integer, context, error)
  0
end
int_or_nil(value, context=nil) click to toggle source
# File lib/new_relic/coerce.rb, line 21
def int_or_nil(value, context=nil)
  return nil if value.nil?
  Integer(value)
rescue => error
  log_failure(value, Integer, context, error)
  nil
end
log_failure(value, type, context, error) click to toggle source
# File lib/new_relic/coerce.rb, line 63
def log_failure(value, type, context, error)
  msg = "Unable to convert '#{value}' to #{type}"
  msg += " in context '#{context}'" if context
  NewRelic::Agent.logger.warn(msg, error)
end
scalar(val) click to toggle source
# File lib/new_relic/coerce.rb, line 46
def scalar(val)
  case val
  when String, Integer, TrueClass, FalseClass, NilClass
    val
  when Float
    if val.finite?
      val
    else
      nil
    end
  when Symbol
    val.to_s
  else
    "#<#{val.class.to_s}>"
  end
end
string(value, context=nil) click to toggle source
# File lib/new_relic/coerce.rb, line 38
def string(value, context=nil)
  return value if value.nil?
  String(value)
rescue => error
  log_failure(value.class, String, context, error)
  ""
end