module Mmtrix::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)
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# File lib/mmtrix/coerce.rb, line 30 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)
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# File lib/mmtrix/coerce.rb, line 15 def int(value, context=nil) Integer(value) rescue => error log_failure(value, Integer, context, error) 0 end
int_or_nil(value, context=nil)
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# File lib/mmtrix/coerce.rb, line 22 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)
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# File lib/mmtrix/coerce.rb, line 64 def log_failure(value, type, context, error) msg = "Unable to convert '#{value}' to #{type}" msg += " in context '#{context}'" if context Mmtrix::Agent.logger.warn(msg, error) end
scalar(val)
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# File lib/mmtrix/coerce.rb, line 47 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)
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# File lib/mmtrix/coerce.rb, line 39 def string(value, context=nil) return value if value.nil? String(value) rescue => error log_failure(value.class, String, context, error) "" end