Class DRb::DRbUnknown
In: lib/drb/drb.rb
Parent: Object

Class wrapping a marshalled object whose type is unknown locally.

If an object is returned by a method invoked over drb, but the class of the object is unknown in the client namespace, or the object is a constant unknown in the client namespace, then the still-marshalled object is returned wrapped in a DRbUnknown instance.

If this object is passed as an argument to a method invoked over drb, then the wrapped object is passed instead.

The class or constant name of the object can be read from the name attribute. The marshalled object is held in the buf attribute.

Methods

exception   new   reload  

Attributes

buf  [R]  Buffer contained the marshalled, unknown object.
name  [R]  The name of the unknown thing.

Class name for unknown objects; variable name for unknown constants.

Public Class methods

Create a new DRbUnknown object.

buf is a string containing a marshalled object that could not be unmarshalled. err is the error message that was raised when the unmarshalling failed. It is used to determine the name of the unmarshalled object.

[Source]

     # File lib/drb/drb.rb, line 466
466:     def initialize(err, buf)
467:       case err.to_s
468:       when /uninitialized constant (\S+)/
469:         @name = $1
470:       when /undefined class\/module (\S+)/
471:         @name = $1
472:       else
473:         @name = nil
474:       end
475:       @buf = buf
476:     end

Public Instance methods

Create a DRbUnknownError exception containing this object.

[Source]

     # File lib/drb/drb.rb, line 509
509:     def exception
510:       DRbUnknownError.new(self)
511:     end

Attempt to load the wrapped marshalled object again.

If the class of the object is now known locally, the object will be unmarshalled and returned. Otherwise, a new but identical DRbUnknown object will be returned.

[Source]

     # File lib/drb/drb.rb, line 504
504:     def reload
505:       self.class._load(@buf)
506:     end

[Validate]