# class DBus::Object

Exported object type

# Exportable D-Bus object class¶ ↑

Objects that are going to be exported by a D-Bus service should inherit from this class. At the client side, use ProxyObject.

### Attributes

path[R]

The path of the object.

service[W]

The service that the object is exported by.

### Public Class Methods

dbus_interface(s) { || ... } click to toggle source

Select (and create) the interface that the following defined methods belong to.

    # File lib/dbus/export.rb, line 72
    def self.dbus_interface(s)
      @@intfs_mutex.synchronize do
        @@cur_intf = intfs[s]
        if !@@cur_intf
          @@cur_intf = Interface.new(s)
          # As this is a mutable class_attr, we cannot use
          #   self.intfs[s] = @@cur_intf                      # Hash#[]=
          # as that would modify parent class attr in place.
          # Using the setter lets a subclass have the new value
          # while the superclass keeps the old one.
          self.intfs = intfs.merge(s => @@cur_intf)
        end
        yield
        @@cur_intf = nil
      end
    end

dbus_method(sym, protoype = "", &block) click to toggle source

Defines an exportable method on the object with the given name sym, prototype and the code in a block.

    # File lib/dbus/export.rb, line 98
    def self.dbus_method(sym, protoype = "", &block)
      raise UndefinedInterface, sym if @@cur_intf.nil?
      @@cur_intf.define(Method.new(sym.to_s).from_prototype(protoype))
      define_method(Object.make_method_name(@@cur_intf.name, sym.to_s), &block)
    end

dbus_signal(sym, protoype = "") click to toggle source

Defines a signal for the object with a given name sym and prototype.

    # File lib/dbus/export.rb, line 111
    def self.dbus_signal(sym, protoype = "")
      raise UndefinedInterface, sym if @@cur_intf.nil?
      cur_intf = @@cur_intf
      signal = Signal.new(sym.to_s).from_prototype(protoype)
      cur_intf.define(Signal.new(sym.to_s).from_prototype(protoype))
      define_method(sym.to_s) do |*args|
        emit(cur_intf, signal, *args)
      end
    end

make_method_name(intfname, methname) click to toggle source

Helper method that returns a method name generated from the interface name intfname and method name methname. @api private

    # File lib/dbus/export.rb, line 126
    def self.make_method_name(intfname, methname)
      "#{intfname}%%#{methname}"
    end

new(path) click to toggle source

Create a new object with a given path. Use DBus::Service#export to export it.

    # File lib/dbus/export.rb, line 34
    def initialize(path)
      @path = path
      @service = nil
    end

### Public Instance Methods

dispatch(msg) click to toggle source

Dispatch a message msg to call exported methods

    # File lib/dbus/export.rb, line 40
    def dispatch(msg)
      case msg.message_type
      when Message::METHOD_CALL
        reply = nil
        begin
          if !intfs[msg.interface]
            raise DBus.error("org.freedesktop.DBus.Error.UnknownMethod"),
                  "Interface \"#{msg.interface}\" of object \"#{msg.path}\" doesn't exist"
          end
          meth = intfs[msg.interface].methods[msg.member.to_sym]
          if !meth
            raise DBus.error("org.freedesktop.DBus.Error.UnknownMethod"),
                  "Method \"#{msg.member}\" on interface \"#{msg.interface}\" of object \"#{msg.path}\" doesn't exist"
          end
          methname = Object.make_method_name(msg.interface, msg.member)
          retdata = method(methname).call(*msg.params)
          retdata = [*retdata]

          reply = Message.method_return(msg)
          meth.rets.zip(retdata).each do |rsig, rdata|
            reply.add_param(rsig.type, rdata)
          end
        rescue => ex
          dbus_msg_exc = msg.annotate_exception(ex)
          reply = ErrorMessage.from_exception(dbus_msg_exc).reply_to(msg)
        end
        @service.bus.message_queue.push(reply)
      end
    end

emit(intf, sig, *args) click to toggle source

Emits a signal from the object with the given interface, signal sig and arguments args.

    # File lib/dbus/export.rb, line 106
    def emit(intf, sig, *args)
      @service.bus.emit(@service, self, intf, sig, *args)
    end