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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
module Qpid::Proton::Util
# Provides mixin functionality for dealing with exception conditions.
#
# @private
module ErrorHandler
def self.included(other) other.extend(self); end
def can_raise_error(method_names, options = {})
error_class = options[:error_class]
below = options[: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
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
# Raises an Proton-specific error if a return code is non-zero.
#
# Expects the class to provide an +error+ method.
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
end
end
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