Net::DBus::ProxyObject - Implement objects to export to the bus
# Connecting an object to the bus, under a service package main; use Net::DBus; # Attach to the bus my $bus = Net::DBus->find; # Create our applications object instance my $object = Demo::HelloWorld->new() # Acquire a service org.demo.Hello my $service = $bus->export_service("org.demo.Hello"); # Finally export the object to the bus my $proxy = Demo::HelloWorld::DBus->new($object); ....rest of program... # Define a new package for the object were going # to export package Demo::HelloWorld; sub new { my $class = shift; my $service = shift; my $self = {}; $self->{sighandler} = undef; bless $self, $class; return $self; } sub sighandler { my $self = shift; my $callback = shift; $self->[sighandler} = $callback; } sub Hello { my $self = shift; my $name = shift; &{$self->{sighandler}}("Greeting", "Hello $name"); return "Said hello to $name"; } sub Goodbye { my $self = shift; my $name = shift; &{$self->{sighandler}}("Greeting", "Goodbye $name"); return "Said goodbye to $name"; } # Define a new package for the object were going # to export package Demo::HelloWorld::DBus; # Specify the main interface provided by our object use Net::DBus::Exporter qw(org.example.demo.Greeter); # Were going to be a DBus object use base qw(Net::DBus::ProxyObject); # Export a Greeting signal taking a stringl string parameter dbus_signal("Greeting", ["string"]); # Export Hello as a method accepting a single string # parameter, and returning a single string value dbus_method("Hello", ["string"], ["string"]); sub new { my $class = shift; my $service = shift; my $impl = shfit; my $self = $class->SUPER::new($service, "/org/demo/HelloWorld", $impl); bless $self, $class; $self->sighandler(sub { my $signame = shift; my $arg = shift; $self->emit_signal($signame, $arg); }); return $self; } # Export Goodbye as a method accepting a single string # parameter, and returning a single string, but put it # in the org.exaple.demo.Farewell interface dbus_method("Goodbye", ["string"], ["string"], "org.example.demo.Farewell");
This the base for creating a proxy between a bus object and an application's object. It allows the application's object model to remain separate from the RPC object model. The proxy object will forward method calls from the bus, to the implementation object. The proxy object can also register callbacks against the application object, which it can use to then emit signals on the bus.
This creates a new DBus object with an path of $path
registered within the service $service. The
$path parameter should be a string complying with the usual
DBus requirements for object paths, while the $service
parameter should be an instance of Net::DBus::Service. The latter is
typically obtained by calling the export_service method on
the Net::DBus object. The $impl parameter is the
application object which will implement the methods being exported to
the bus.
This creates a new DBus child object with an path of
$subpath relative to its parent $parentobj.
The $subpath parameter should be a string complying with
the usual DBus requirements for object paths, while the
$parentobj parameter should be an instance of
Net::DBus::BaseObject or a subclass. The $impl parameter is
the application object which will implement the methods being exported
to the bus.
Daniel P. Berrange
Copyright (C) 2005-2011 Daniel P. Berrange
Net::DBus, Net::DBus::Service, Net::DBus::BaseObject, Net::DBus::ProxyObject, Net::DBus::Exporter, Net::DBus::RemoteObject