Net::DBus::ProxyObject(3pm) | User Contributed Perl Documentation | Net::DBus::ProxyObject(3pm) |
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 application's 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 we're 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 we're going # to export package Demo::HelloWorld::DBus; # Specify the main interface provided by our object use Net::DBus::Exporter qw(org.example.demo.Greeter); # We're 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.
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
2020-11-09 | perl v5.32.0 |