POE::API::Peek.3pm

Langue: en

Autres versions - même langue

Version: 2010-05-04 (fedora - 01/12/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

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

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

This version of this module is certified against POE version 1.0001 and above. It will fail on any other POE version.

Further, this module requires perl v5.6.1 or above.

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

Get the children (if any) for a given session. Takes one optional parameter, a POE::Session object. 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, $session)) { }
   if($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);
     my $parent = $api->get_session_parent();

Get the parent for a given session. Takes one optional parameter, a POE::Session object. 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. 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);
   my $count = $api->get_session_refcount();

Obtain the reference count for a given POE::Session. Takes one optional parameter, a POE::Session object. 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);

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);

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

Obtain a list of aliases for a POE::Session object. Takes one optional parameter, a POE::Session object. 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);
   my $count = $api->session_alias_count();

Obtain the count of how many aliases a session has. Takes one optional parameter, a POE::Session object. 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);
     my $str = $api->session_id_loggable();

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

EVENT UTILITIES

event_count_to

   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. if none is provided, defaults to the current session. Returns an integer.

event_count_from

   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. If non 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:

*
ID

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

*
index

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

*
priority

The priority level this entry has.

*
event

The name of this event

*
source

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

*
destination

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

*
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);
   my $count = $api->get_session_extref_count();

Obtain the number of extra references a session has. Takes one optional parameter, a POE::Session object. 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);
   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. If this parameter is not supplied, it will default to the currently active session.

SIGNAL UTILITIES

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. 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, $session)) { }
   if($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. If this parameter is not provided, it will default to the currently active session. Returns a boolean.

AUTHORS

Matt Cashner (sungo@pobox.com)
Yuval Kogman (nothingmuch@woobling.org)

LICENSE

Copyright (c) 2003 - 2008, Matt Cashner.
Copyright (c) 2008, Yuval Kogman

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

*
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
*
Neither the name of Matt Cashner nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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