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require 'open4'
# add additional fields to Exception class to format errors according to OT-API
class RuntimeError
attr_accessor :http_code, :uri
def initialize message, uri=nil
super message
@uri = uri
@http_code ||= 500
@rdf = RDF::Graph.new
subject = RDF::Node.new
@rdf << [subject, RDF.type, RDF::OT.ErrorReport]
@rdf << [subject, RDF::OT.actor, @uri.to_s]
@rdf << [subject, RDF::OT.message, message.to_s]
@rdf << [subject, RDF::OT.statusCode, @http_code]
@rdf << [subject, RDF::OT.errorCode, self.class.to_s]
@rdf << [subject, RDF::OT.errorCause, short_backtrace]
$logger.error("\n"+self.to_turtle)
end
def short_backtrace
backtrace = caller.collect{|line| line unless line =~ /#{File.dirname(__FILE__)}/}.compact
cut_index = backtrace.find_index{|line| line.match /sinatra|minitest/}
cut_index ||= backtrace.size
cut_index -= 1
cut_index = backtrace.size-1 if cut_index < 0
backtrace[0..cut_index].join("\n")
end
RDF_FORMATS.each do |format|
# rdf serialization methods for all formats e.g. to_rdfxml
send :define_method, "to_#{format}".to_sym do
RDF::Writer.for(format).buffer do |writer|
@rdf.each{|statement| writer << statement}
end
end
end
def to_turtle # redefine to use prefixes (not supported by RDF::Writer)
prefixes = {:rdf => "http://www.w3.org/1999/02/22-rdf-syntax-ns#"}
['OT', 'DC', 'XSD', 'OLO'].each{|p| prefixes[p.downcase.to_sym] = eval("RDF::#{p}.to_s") }
RDF::N3::Writer.for(:turtle).buffer(:prefixes => prefixes) do |writer|
@rdf.each{|statement| writer << statement}
end
end
end
module OpenTox
class Error < RuntimeError
def initialize code, message, uri=nil
@http_code = code
super message, uri
end
end
# OpenTox errors
{
"BadRequestError" => 400,
"NotAuthorizedError" => 401,
"NotFoundError" => 404,
"LockedError" => 423,
"InternalServerError" => 500,
"NotImplementedError" => 501,
"RestCallError" => 501,
"ServiceUnavailableError" => 503,
"TimeOutError" => 504,
}.each do |klass,code|
# create error classes
c = Class.new Error do
define_method :initialize do |message, uri=nil|
super code, message, uri
end
end
OpenTox.const_set klass,c
# define global methods for raising errors, eg. bad_request_error
Object.send(:define_method, klass.underscore.to_sym) do |message,uri=nil|
raise c.new(message, uri)
end
end
end
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