GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  POE::API::PEEK (3)

.ds Aq ’

NAME

POE::API::Peek - Peek into the internals of a running POE environment

CONTENTS

VERSION

version 2.20

DESCRIPTION

POE::API::Peek extends the POE::Kernel interface to provide clean access to Kernel internals in a cross-version compatible manner. Other calculated data is also available.

My intention is to provide massive amounts of internal data for use in POE debugging.

WARNING

<B>This version of this module is certified against POE version 1.300 and above. It will fail on any other POE version.B>

<B>Further, this module requires perl v5.6.1 or above.B>

METHODS

    new



  my $api = POE::API::Peek->new();



Returns a blessed reference. Takes no parameters.

    id



  my $foo = $api->id();



Obtain the unique id for the kernel. Takes no parameters. Returns a scalar containing a string.

KERNEL UTILITIES

    is_kernel_running



  if($api->is_kernel_running) {
      # do stuff...
  }



Tell if the POE Kernel is running and active. Returns 1 if the Kernel is running and 0 if it is not.

    active_event



  my $event = $api->active_event();



Get the active event name. Returns a string containing the event name.

    kernel_memory_size



  my $size = $api->kernel_memory_size();



Get the memory footprint of the kernel and consequently the entire POE environment. See the Devel::Size documentation for several caveats involved in this metric.

    event_list



  my $events = $api->event_list();



Gets the list of events for the whole POE environment. Returns a hash with the session IDs as the keys and a list of events as the values.

    which_loop



  my $loop_name = $api->which_loop();



Tell which Loop POE has decided to use. Returns the string name of the Loop module.

SESSION UTILITIES

    current_session



  my $foo = $api->current_session();



Get the POE::Session object for the currently active session. Takes no parameters. Returns a scalar containing a reference.

    get_session_children



    my @children = $api->get_session_children($session_id);
    my @children = $api->get_session_children();



Get the children (if any) for a given session. Takes one optional parameter, a POE::Session object or ID. If this parameter is not provided, the method defaults to the currently active session. Returns a list of POE::Session objects.

    is_session_child



  if($api->is_session_child($parent, $session_id)) { }
  if($api->is_session_child($parent, $session)) { }
  if($api->is_session_child($parent)) { }



Determine if POE::Session A is a child of POE::Session B. Takes one mandatory parameter, a POE::Session object which is the potential parent session this method will interrogate. Takes one optional parameter, a POE::Session object which is the session whose parentage this method will determine. If this parameter is not specified, it will default to the currently active session. Returns a boolean.

    get_session_parent



    my $parent = $api->get_session_parent($session_id);
    my $parent = $api->get_session_parent($session);
    my $parent = $api->get_session_parent();



Get the parent for a given session. Takes one optional parameter, a POE::Session object or ID. If this parameter is not provided, the method defaults to the currently active session. Returns a POE::Session object.

    resolve_session_to_ref



  my $session = $api->resolve_session_to_ref($session_id);
  my $session = $api->resolve_session_to_ref();



Obtain a reference to a session given its ID. Takes one optional parameter, a POE::Session ID. If this parameter is not specified, it will default to the currently active session. Returns a reference to a POE::Session object on success; undef on failure.

    resolve_session_to_id



  my $session_id = $api->resolve_session_to_id($session);
  my $session_id = $api->resolve_session_to_id();



Obtain the session id for a given POE::Session object. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns an integer on success and undef on failure.

    get_session_refcount



  my $count = $api->get_session_refcount($session_id);
  my $count = $api->get_session_refcount($session);
  my $count = $api->get_session_refcount();



Obtain the reference count for a given POE::Session. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns an integer.

    session_count



  my $count = $api->session_count();



Obtain a count of how many sessions exist. Takes no parameters. Returns an integer.

Note: for various reasons, the Kernel counts as a session.

    session_list



  my @sessions = $api->session_list();



Obtain a list of all the sessions that exist. Takes no parameters. Returns a list populated with POE::Session objects.

Note: While the Kernel counts as a session, it has been extracted from this list.

    session_memory_size



  my $size = $api->session_memory_size();
  my $size = $api->session_memory_size($session);
  my $size = $api->session_memory_size($session_id);



Get the memory footprint of a session. If no session is provided, the current session is used. See the Devel::Size documentation for several caveats involved in this metric.

    session_event_list



  my @events = $api->session_event_list();
  my $events = $api->session_event_list();
  my @events = $api->session_event_list($session);
  my $events = $api->session_event_list($session);
  my @events = $api->session_event_list($session_id);
  my $events = $api->session_event_list($session_id);



Get the list of events for a session. If no session is provided, the current session is used.

ALIAS UTILITIES

    resolve_alias



  my $session = $api->resolve_alias($session_alias);



Resolve a session alias into a POE::Session object. Takes one mandatory parameter, a session alias. Returns a POE::Session object on success or undef on failure.

    session_alias_list



  my @aliases = $api->session_alias_list($session_id);
  my @aliases = $api->session_alias_list($session);
  my @aliases = $api->session_alias_list();



Obtain a list of aliases for a POE::Session object. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns a list of strings.

    session_alias_count



  my $count = $api->session_alias_count($session_id);
  my $count = $api->session_alias_count($session);
  my $count = $api->session_alias_count();



Obtain the count of how many aliases a session has. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns an integer.

    session_id_loggable



    my $str = $api->session_id_loggable($session_id);
    my $str = $api->session_id_loggable($session);
    my $str = $api->session_id_loggable();



Obtain a loggable version of a session id. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns a string.

EVENT UTILITIES

# event_count_to {{{

    event_count_to



  my $count = $api->event_count_to($session_id);
  my $count = $api->event_count_to($session);
  my $count = $api->event_count_to();



Get the number of events heading toward a particular session. Takes one parameter, a POE::Session object or ID. if none is provided, defaults to the current session. Returns an integer.

    event_count_from



  my $count = $api->get_session_extref_count($session_id);
  my $count = $api->event_count_from($session);
  my $count = $api->event_count_from();



Get the number of events heading out from a particular session. Takes one parameter, a POE::Session object or ID. If none is provided, defaults to the current session. Return an integer.

    event_queue



  my $foo = $api->event_queue();



Access the internal event queue. Takes no parameters. Returns a scalar containing a reference to a POE::Queue::Array object.

    event_queue_dump



  my @queue = $api->event_queue_dump();



Dump the contents of the event queue in a nice understandable fashion. Takes no parameters. Returns a list of queue items. Each item is a hash containing the following entries:
o ID

The id number that POE’s queue identifies this entry as.

o index

The index into the POE::Queue::Array which holds this entry.

o priority

The priority level this entry has.

o event

The name of this event

o source

What caused this event. Usually a POE::Session.

o destination

Where this event is headed. Usually a POE::Session.

o type

The type of event this is. May have the value User, _start, _stop, _signal, _garbage_collect, _parent, _child, _sigchld_poll, Alarm, File Activity, or Unknown.

EXTREF UTILITIES

    extref_count



  my $count = $api->extref_count();



Obtain a count of sessions with extra references. Takes no parameters. Returns an integer.

    get_session_extref_count



  my $count = $api->get_session_extref_count($session_id);
  my $count = $api->get_session_extref_count($session);
  my $count = $api->get_session_extref_count();



Obtain the number of extra references a session has. Takes one optional parameter, a POE::Session object or ID. If this parameter is not specified, it will default to the currently active session. Returns an integer.

FILEHANDLE UTILITIES

    is_handle_tracked



  if($api->is_handle_tracked($handle, $mode)) { }



Determine if POE is tracking a handle. Takes two mandatory parameters, a filehandle and a mode indicator. Returns a boolean.

    handle_count



  my $count = $api->handle_count();



Obtain a count of how many handles POE is tracking. Takes no parameters. Returns an integer.

    session_handle_count



  my $count = $api->session_handle_count($session_id);
  my $count = $api->session_handle_count($session);
  my $count = $api->session_handle_count();



Obtain a count of the active handles for a given session. Takes one optional parameter, a POE::Session object or ID. If this parameter is not supplied, it will default to the currently active session.

PID UTILITIES

    session_pid_count



    my $count = $api->session_pid_count($session_id);
    my $count = $api->session_pid_count($session);
    my $count = $api->session_pid_count();



Obtain a count of the process IDs being watched by a session. Takes one optional parameter, a POE::Session object or ID. If this parameter is not supplied, it will default to the currently active session.

Since 1.350 of POE it is no longer possible to query the number of processes a session is watching. This method is deprecated and will be removed in a future version.

SIGNAL UTILITIES

POTENTIAL BREAKAGE NOTE: In POE v1.293 (in particular: svn rev 2916) changed the structure of signals. Previously, the data portion of a signal was simply the name of the event to be called. Now it contains a data portion, continuation style arguments that may be passed on to the signal handler.

See the POE::Kernel documentation for more info.

    get_safe_signals



  my @safe_signals = $api->get_safe_signals();



Obtain a list of signals which it is safe for POE to manipulate. Takes no parameters. Returns a list of strings.

    get_signal_type



  my $type = $api->get_signal_type($signal_name);



Figure out which type of signal this is. Signals can be one of three types, BENIGN, TERMINAL, NONMASKABLE. The type value returned here, corresponds to subroutine constants SIGTYPE_BENIGN, SIGTYPE_TERMINAL, and SIGTYPE_NONMASKABLE in POE::Kernel’s namespace. Takes one mandatory parameter, a signal name.

    is_signal_watched



  if($api->is_signal_watched($signal_name)) { }



Determine if a signal is being explicitly watched. Takes one mandatory parameter, a signal name. Returns a boolean.

    signals_watched_by_session



  my %signals = $api->signals_watched_by_session($session);
  my %signals = $api->signals_watched_by_session();



Get the signals watched by a session and the events they generate. Takes one optional parameter, a POE::Session object or ID. If this parameter is not supplied, it will default to the currently active session. Returns a hash, with a signal name as the key and the event the session generates as the value.

    signal_watchers



  my %watchers = $api->signal_watchers($signal_name);



Get a list of the sessions watching a particular signal. Takes one mandatory parameter, a signal name. Returns a hash, keyed by session reference with an event name as the value.

    is_signal_watched_by_session



  if($api->is_signal_watched_by_session($signal_name, $session_id)) { }
  if($api->is_signal_watched_by_session($signal_name, $session)) { }
  if($api->is_signal_watched_by_session($signal_name)) { }



Determine if a given session is explicitly watching a signal. Takes one mandatory parameter, a signal name. Takes one optional parameter, a POE::Session object or ID. If this parameter is not provided, it will default to the currently active session. Returns a boolean.

AUTHORS

sungo <sungo@sungo.us> Yuval Kogman <nothingmuch@woobling.org> Chris ’BinGOs’ Williams <bingos@cpan.org> Philip Gwyn <gwyn@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2012 by Matt Cashner (sungo).

This is free software, licensed under:



  The (three-clause) BSD License



Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 POE::API::PEEK (3) 2012-01-11

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.