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# encoding: utf-8
module AMQP
# Base class for AMQP connection lifecycle exceptions.
# @api public
class Error < StandardError
# An exception in one of the underlying libraries that caused this
# exception to be re-thrown. May be nil.
attr_reader :cause
end
# All the exceptions below are new in 0.8.0. Previous versions
# used AMQP::Error for everything. We have to carry this baggage but
# there is a way out: simply subclass AMQP::Error and provide a backwards-compatible
# way of attaching root cause exception (like AMQ::Client::TCPConnectionFailed) instance
# to it.
#
# In other words: AMQP::Error is here to stay for a long time. MK.
# Raised when initial TCP connection to the broker fails.
# @api public
class TCPConnectionFailed < Error
# @return [Hash] connection settings that were used
attr_reader :settings
def initialize(settings, cause = nil)
@settings = settings
@cause = cause
super("Could not establish TCP connection to #{@settings[:host]}:#{@settings[:port]}")
end # TCPConnectionFailed
end
# Raised when authentication fails.
# @api public
class PossibleAuthenticationFailureError < Error
# @return [Hash] connection settings that were used
attr_reader :settings
def initialize(settings)
@settings = settings
super("AMQP broker closed TCP connection before authentication succeeded: this usually means authentication failure due to misconfiguration. Settings are #{filtered_settings.inspect}")
end # initialize(settings)
def filtered_settings
filtered_settings = settings.dup
[:pass, :password].each do |sensitve_setting|
filtered_settings[sensitve_setting] &&= '[filtered]'
end
filtered_settings
end
end # PossibleAuthenticationFailureError
# Raised when queue (or exchange) declaration fails because another queue with the same
# name but different attributes already exists in the channel object cache.
# @api public
class IncompatibleOptionsError < Error
def initialize(name, opts_1, opts_2)
super("There is already an instance called #{name} with options #{opts_1.inspect}, you can't define the same instance with different options (#{opts_2.inspect})!")
end
end # IncompatibleOptionsError
# Raised on attempt to use a channel that was previously closed
# (either due to channel-level exception or intentionally via AMQP::Channel#close).
# @api public
class ChannelClosedError < Error
def initialize(instance)
super("Channel with id = #{instance.channel} is closed, you can't use it anymore!")
end
end # ChannelClosedError
# Raised on attempt to use a connection that was previously closed
# @api public
class ConnectionClosedError < Error
def initialize(frame)
super("The connection is closed, you can't use it anymore!")
end
end # ConnectionClosedError
end # AMQP
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