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Exception: Ractor::ClosedError

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::StopIteration, ::IndexError, ::StandardError, ::Exception
Instance Chain:
self, ::StopIteration, ::IndexError, ::StandardError, ::Exception
Inherits: StopIteration
Defined in: ractor.c,
ractor.c

Overview

Raised when an attempt is made to send a message to a closed port, or to retrieve a message from a closed and empty port. Ports may be closed explicitly with Ractor#close_outgoing/close_incoming and are closed implicitly when a ::Ractor terminates.

r = Ractor.new { sleep(500) }
r.close_outgoing
r.take # Ractor::ClosedError

ClosedError is a descendant of ::StopIteration, so the closing of the ractor will break the loops without propagating the error:

r = Ractor.new do
  loop do
    msg = receive # raises ClosedError and loop traps it
    puts "Received: #{msg}"
  end
  puts "loop exited"
end

3.times{|i| r << i}
r.close_incoming
r.take
puts "Continue successfully"

This will print:

Received: 0
Received: 1
Received: 2
loop exited
Continue successfully

Class Attribute Summary

::Exception - Inherited

.to_tty?

Returns true if exception messages will be sent to a terminal device.

Class Method Summary

::Exception - Inherited

.exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
.new

Returns a new exception object.

Instance Method Summary

::StopIteration - Inherited

#result

Returns the return value of the iterator.

::Exception - Inherited

#==

Returns whether object is the same class as self and its #message and #backtrace are equal to those of self.
#backtrace

Returns the backtrace (the list of code locations that led to the exception), as an array of strings.
#backtrace_locations

Returns the backtrace (the list of code locations that led to the exception), as an array of ::Thread::Backtrace::Location instances.
#cause

Returns the previous value of global variable $!, which may be nil (see Global Variables):
#detailed_message

Returns the message string with enhancements:
#exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
#full_message

Returns an enhanced message string:
#inspect

Returns a string representation of self:
#message

Returns #to_s.
#set_backtrace

Sets the backtrace value for self; returns the given value.
#to_s

Returns a string representation of self:

Constructor Details

This class inherits a constructor from Exception