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POE::Wheel::ListenAccept - POE Listen/Accept Logic Abstraction |
- NAME
- SUPPORTED PLATFORMS
- SYNOPSIS
- DESCRIPTION
- PUBLIC METHODS
- EVENTS AND PARAMETERS
- SEE ALSO
- BUGS
- AUTHORS & COPYRIGHTS
NAME
POE::Wheel::ListenAccept - POE Listen/Accept Logic Abstraction
SUPPORTED PLATFORMS
- Linux
- Solaris
- Windows
SYNOPSIS
$wheel = new POE::Wheel::ListenAccept(
Handle => $socket_handle, # Listening socket
AcceptState => $accept_state_name, # Success state
ErrorState => $error_state_name, # Failure state
);
$wheel->event( AcceptState => $new_state_name ); # Add/change state $wheel->event( ErrorState => undef ); # Remove state
DESCRIPTION
ListenAccept waits for activity on a listening socket and accepts remote connections as they arrive. It generates events for successful and failed connections (EAGAIN is not considered to be a failure).
This wheel neither needs nor includes a put() method.
ListenAccept is a good way to listen on sockets from other sources,
such as IO::Socket or plain socket() calls.
PUBLIC METHODS
POE::Wheel::ListenAccept::event( ... )
The event() method changes the events that a ListenAccept wheel emits
for different conditions. It accepts a list of event types and
values. Defined state names change the previous values. Undefined
ones turn off the given condition's events.
For example, this event() call changes a wheel's AcceptState event and
turns off its ErrorState event.
$wheel->event( AcceptState => $new_accept_state_name,
ErrorState => undef
);
EVENTS AND PARAMETERS
-
AcceptState
The AcceptState event contains the name of the state that will be called when a new connection has been accepted.
The ARG0 parameter contains the accepted connection's new socket handle.
A sample AcceptState state:
sub accept_state { my $accepted_handle = $_[ARG0]; # Optional security things with getpeername might go here. &create_server_session($handle); } -
ErrorState
The ErrorState event contains the name of the state that will be called when a socket error occurs. The ListenAccept wheel knows what to do with EAGAIN, so it's not considered an error worth reporting.
The ARG0 parameter contains the name of the function that failed. This usually is 'accept'. ARG1 and ARG2 contain the numeric and string versions of $! at the time of the error, respectively.
A sample ErrorState state:
sub error_state { my ($operation, $errnum, $errstr) = @_[ARG0, ARG1, ARG2]; warn "$operation error $errnum: $errstr\n"; }
SEE ALSO
POE::Wheel; POE::Wheel::FollowTail; POE::Wheel::ReadWrite; POE::Wheel::SocketFactory
BUGS
Oh, probably some.
AUTHORS & COPYRIGHTS
Please see the POE manpage.
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POE::Wheel::ListenAccept - POE Listen/Accept Logic Abstraction |