Tangence::Client - mixin class for building a Tangence client


This class is a mixin, it cannot be directly constructed

   package Example::Client;
   use base qw( Base::Client Tangence::Client );

   sub connect
      my $self = shift;
      $self->SUPER::connect( @_ );


      wait_for { defined $self->rootobj };

   sub tangence_write
      my $self = shift;
      $self->write( $_[0] );

   sub on_read
      my $self = shift;
      $self->tangence_readfrom( $_[0] );

   package main;

   my $client = Example::Client->new;
   $client->connect( "" );

   my $rootobj = $client->rootobj;


This module provides mixin to implement a Tangence client connection. It should be mixed in to an object used to represent a single connection to a server. It provides a central location in the client to store object proxies, including to the root object and the registry, and coordinates passing messages between the server and the object proxies it contains.

This is a subclass of Tangence::Stream which provides implementations of the required handle_request_ methods. A class mixing in Tangence::Client must still provide the tangence_write method required for sending data to the server.

For an example of a class that uses this mixin, see Net::Async::Tangence::Client.


The following methods are provided by this mixin.


   $rootobj = $client->rootobj

Returns a Tangence::ObjectProxy to the server's root object


   $registry = $client->registry

Returns a Tangence::ObjectProxy to the server's object registry if one has been received, or undef if not.

This method is now deprecated in favour of "get_registry". Additionally note that currently the client will attempt to request the registry at connection time, but a later version of this module will stop doing that, so users who need access to it should call get_registry.


   $registry = $client->get_registry->get

Returns a Future that will yield a Tangence::ObjectProxy to the server's registry object.

Note that not all servers may permit access to the registry.


   $client->tangence_connected( %args )

Once the base connection to the server has been established, this method should be called to perform the initial work of requesting the root object and the registry.

It takes the following named arguments:

do_init => BOOL

Ignored. Maintained for compatibility with previous version that allowed this to be disabled.

on_root => CODE

Optional callback to be invoked once the root object has been returned. It will be passed a Tangence::ObjectProxy to the root object.

   $on_root->( $rootobj )
on_registry => CODE

Optional callback to be invoked once the registry has been returned. It will be passed a Tangence::ObjectProxy to the registry.

   $on_registry->( $registry )

Note that in the case that the server does not permit access to the registry or an error occurs while requesting it, this is invoked with an empty list.

version_minor_min => INT

Optional minimum minor version to negotiate with the server. This can be used to require a higher minimum version than the client module itself supports, in case the application requires features in a newer version than that.


These methods are intended for implementation classes to override.


   $f = $client->new_future

Returns a new Future instance for basing asynchronous operations on.


Paul Evans <>