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.\" ========================================================================
.\"
.IX Title "Net::DBus::Callback 3pm"
.TH Net::DBus::Callback 3pm "2016-07-08" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
Net::DBus::Callback \- a callback for receiving reactor events
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Net::DBus::Callback;
\&
\&  # Assume we have a \*(Aqterminal\*(Aq object and its got a method
\&  # to be invoked everytime there is input on its terminal.
\&  #
\&  # To create a callback to invoke this method one might use
\&  my $cb = Net::DBus::Callback\->new(object => $terminal,
\&                                    method => "handle_stdio");
\&
\&
\&  # Whatever is monitoring the stdio channel, would then
\&  # invoke the callback, perhaps passing in a parameter with
\&  # some \*(Aqinteresting\*(Aq data, such as number of bytes available
\&  $cb\->invoke($nbytes)
\&
\&  #... which results in a call to
\&  #  $terminal\->handle_stdio($nbytes)
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides a simple container for storing details
about a callback to be invoked at a later date. It is used
when registering to receive events from the Net::DBus::Reactor
class. \s-1NB\s0 use of this module in application code is no longer
necessary and it remains purely for backwards compatibility.
Instead you can simply pass a subroutine code reference in
any place where a callback is desired.
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP "my $cb = Net::DBus::Callback\->new(method => $name, [args => \e@args])" 4
.el .IP "my \f(CW$cb\fR = Net::DBus::Callback\->new(method => \f(CW$name\fR, [args => \e@args])" 4
.IX Item "my $cb = Net::DBus::Callback->new(method => $name, [args => @args])"
Creates a new callback object, for invoking a plain old function. The \f(CW\*(C`method\*(C'\fR
parameter should be the fully qualified function name to invoke, including the
package name. The optional \f(CW\*(C`args\*(C'\fR parameter is an array reference of parameters
to be pass to the callback, in addition to those passed into the \f(CW\*(C`invoke\*(C'\fR method.
.ie n .IP "my $cb = Net::DBus::Callback\->new(object => $object, method => $name, [args => \e@args])" 4
.el .IP "my \f(CW$cb\fR = Net::DBus::Callback\->new(object => \f(CW$object\fR, method => \f(CW$name\fR, [args => \e@args])" 4
.IX Item "my $cb = Net::DBus::Callback->new(object => $object, method => $name, [args => @args])"
Creates a new callback object, for invoking a method on an object. The \f(CW\*(C`method\*(C'\fR
parameter should be the name of the method to invoke, while the \f(CW\*(C`object\*(C'\fR parameter
should be a blessed object on which the method will be invoked. The optional \f(CW\*(C`args\*(C'\fR
parameter is an array reference of parameters to be pass to the callback, in addition
to those passed into the \f(CW\*(C`invoke\*(C'\fR method.
.ie n .IP "$cb\->invoke(@args)" 4
.el .IP "\f(CW$cb\fR\->invoke(@args)" 4
.IX Item "$cb->invoke(@args)"
Invokes the callback. The argument list passed to the callback
is a combination of the arguments supplied in the callback
constructor, followed by the arguments supplied in the \f(CW\*(C`invoke\*(C'\fR
method.
.SH "AUTHOR"
.IX Header "AUTHOR"
Daniel P. Berrange.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2004\-2011 Daniel P. Berrange
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Net::DBus::Reactor