Class: Eventbox::CompletionProc

Inherits:

AsyncProc

• Object
• Proc
• WrappedProc
• InternalProc
• AsyncProc
• Eventbox::CompletionProc

Defined in:

lib/eventbox/sanitizer.rb

Overview

Proc object provided as the last argument of yield_call and #yield_proc.

Instance Method Summary

• #raise(*args) ⇒ Object

  Raise an exception in the context of the waiting yield_call or #yield_proc method.

Instance Method Details

#raise(*args) ⇒ Object

Raise an exception in the context of the waiting Eventbox.yield_call or Eventbox#yield_proc method.

This allows to raise an exception to the calling scope from external or action scope:

class MyBox < Eventbox
  yield_call def init(result)
    process(result)
  end

  action def process(result)
    result.raise RuntimeError, "raise from action MyBox#process"
  end
end
MyBox.new   # => raises RuntimeError (raise from action MyBox#process)

In contrast to a direct call of ‘Kernel.raise`, calling this method doesn’t abort the current context. Instead when in the event scope, raising the exception is deferred until returning to the calling external or action scope.

# File 'lib/eventbox/sanitizer.rb', line 305

def raise(*args)
  self.call(WrappedException.new(args))
end