Module: Qpid::Proton::Util::ErrorHandler
Overview
Provides mixin functionality for dealing with exception conditions.
Class Method Summary collapse
Instance Method Summary collapse
- #can_raise_error(method_names, options = {}) ⇒ Object
-
#check_for_error(code, error_class = nil) ⇒ Object
Raises an Proton-specific error if a return code is non-zero.
- #create_exception_handler_wrapper(method_name, error_class = nil, below = 0) ⇒ Object
Class Method Details
.included(other) ⇒ Object
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# File 'lib/util/error_handler.rb', line 26 def self.included(other) other.extend(self); end |
Instance Method Details
#can_raise_error(method_names, options = {}) ⇒ Object
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# File 'lib/util/error_handler.rb', line 28 def can_raise_error(method_names, = {}) error_class = [:error_class] below = [:below] || 0 # coerce the names to be an array Array(method_names).each do |method_name| raise "missing method #{method_name.inspect}" unless method_defined?(method_name) || private_method_defined?(method_name) create_exception_handler_wrapper(method_name, error_class, below) end end |
#check_for_error(code, error_class = nil) ⇒ Object
Raises an Proton-specific error if a return code is non-zero.
Expects the class to provide an error
method.
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# File 'lib/util/error_handler.rb', line 55 def check_for_error(code, error_class = nil) raise ::ArgumentError.new("Invalid error code: #{code}") if code.nil? return code if code > 0 case(code) when Qpid::Proton::Error::NONE return when Qpid::Proton::Error::EOS raise Qpid::Proton::EOSError.new(self.error) when Qpid::Proton::Error::ERROR raise Qpid::Proton::ProtonError.new(self.error) when Qpid::Proton::Error::OVERFLOW raise Qpid::Proton::OverflowError.new(self.error) when Qpid::Proton::Error::UNDERFLOW raise Qpid::Proton::UnderflowError.new(self.error) when Qpid::Proton::Error::ARGUMENT raise Qpid::Proton::ArgumentError.new(self.error) when Qpid::Proton::Error::STATE raise Qpid::Proton::StateError.new(self.error) when Qpid::Proton::Error::TIMEOUT raise Qpid::Proton::TimeoutError.new(self.error) when Qpid::Proton::Error::INPROGRESS return when Qpid::Proton::Error::INTERRUPTED raise Qpid::Proton::InterruptedError.new(self.error) when Qpid::Proton::Error::INPROGRESS raise Qpid::Proton::InProgressError.new(self.error) else raise ::ArgumentError.new("Unknown error code: #{code}") end end |
#create_exception_handler_wrapper(method_name, error_class = nil, below = 0) ⇒ Object
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# File 'lib/util/error_handler.rb', line 38 def create_exception_handler_wrapper(method_name, error_class = nil, below = 0) original_method_name = method_name.to_s wrapped_method_name = "_excwrap_#{original_method_name}" alias_method wrapped_method_name, original_method_name define_method original_method_name do |*args, &block| # need to get a reference to the method object itself since # calls to Class.send interfere with Messenger.send method = self.method(wrapped_method_name.to_sym) rc = method.call(*args, &block) check_for_error(rc, error_class) if rc < below return rc end end |