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# $Id$ |
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# |
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# Copyright (c) 2007 Daisuke Maki <daisuke@endeworks.jp> |
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# All rights reserved. |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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package POE::Component::MessageQueue::Statistics; |
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1484
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use strict; |
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use warnings; |
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1082
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sub new |
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{ |
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my $class = shift; |
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my $self = bless { |
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statistics => { |
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ID => sprintf( |
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"POE::Component::MessageQueue version %s (PID: $$)", |
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# hide from PAUSE |
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eval join('::', '$POE', 'Component', 'MessageQueue', 'VERSION') |
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), |
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total_stored => 0, |
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total_sent => 0, |
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subscriptions => 0, |
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queues => {}, |
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}, |
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store_info => {}, |
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publishers => [], |
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}, $class; |
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$self; |
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} |
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sub register |
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{ |
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my ($self, $mq) = @_; |
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$mq->register_event( $_, $self ) |
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for qw(store dispatch remove recv subscribe unsubscribe); |
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} |
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sub add_publisher { |
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my ($self, $pub) = @_; |
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push(@{$self->{publishers}}, $pub); |
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} |
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sub get_queue |
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{ |
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my ($self, $name) = @_; |
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my $queue = $self->{statistics}{queues}{$name}; |
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unless ($queue) |
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{ |
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$queue = $self->{statistics}{queues}{$name} = {}; |
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$queue->{$_} = 0 foreach qw( |
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sent stored |
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total_stored total_sent |
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total_recvd avg_secs_stored avg_size_recvd |
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); |
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} |
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return $queue; |
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} |
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sub get_topic |
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{ |
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my ($self, $name) = @_; |
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my $topic = $self->{statistics}{topics}{$name}; |
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unless ($topic) |
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{ |
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$topic = $self->{statistics}{topics}{$name} = {}; |
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$topic->{$_} = 0 foreach qw(sent total_sent total_recvd avg_size_recvd); |
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} |
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return $topic; |
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} |
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sub shutdown |
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{ |
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my $self = shift; |
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foreach my $pub (@{$self->{publishers}}) |
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{ |
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$pub->shutdown(); |
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} |
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} |
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sub notify |
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{ |
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my ($self, $event, $data) = @_; |
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if(my $method = $self->can("notify_$event")) |
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{ |
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$method->($self, $data); |
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} |
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else |
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{ |
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die "Tried to notify $event, which has no handler."; |
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} |
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} |
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sub notify_store |
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{ |
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my ($self, $message) = @_; |
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my $qname = $message->destination; |
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return unless $qname =~ m(/queue/(.*)); |
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$qname = $1; |
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$self->{store_info}->{$message->id} = { |
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qname => $qname, |
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timestamp => time(), |
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}; |
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my $global = $self->{statistics}; |
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$global->{total_stored}++; |
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my $stats = $self->get_queue($qname); |
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$stats->{stored}++; |
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$stats->{total_stored}++; |
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$stats->{last_stored} = scalar localtime(); |
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} |
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sub reaverage { |
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my ($total, $average, $size) = @_; |
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return 0 if ($total <= 0); |
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return ($average * ($total - 1) + $size) / $total; |
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} |
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sub get_destination |
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{ |
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my ($self, $data) = @_; |
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my $d = $data->{destination}; |
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if ($d->name =~ m{/.*/(.*)}) |
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{ |
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return $d->isa('POE::Component::MessageQueue::Queue') ? |
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$self->get_queue($1) : |
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$self->get_topic($1) ; |
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} |
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return; |
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} |
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153
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sub notify_recv |
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{ |
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my ($self, $data) = @_; |
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my $stats = $self->get_destination($data); |
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$stats->{total_recvd}++; |
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# recalc the average |
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$stats->{avg_size_recvd} = reaverage( |
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$stats->{total_recvd}, |
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$stats->{avg_size_recvd}, |
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$data->{message}->size, |
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); |
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} |
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167
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sub notify_dispatch |
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{ |
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my ($self, $data) = @_; |
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171
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my $global = $self->{statistics}; |
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$global->{total_sent}++; |
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174
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my $stats = $self->get_destination($data); |
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$stats->{total_sent}++; |
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$stats->{sent}++; |
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$stats->{last_sent} = scalar localtime(); |
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} |
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180
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sub notify_remove { |
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my ($self, $id) = @_; |
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1
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507
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use YAML; |
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0
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183
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184
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if (my $store_info = delete $self->{store_info}->{$id}) |
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{ |
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my $stats = $self->get_queue($store_info->{qname}); |
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$stats->{stored}--; |
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$stats->{avg_secs_stored} = reaverage( |
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$stats->{total_stored}, |
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$stats->{avg_secs_stored}, |
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(time() - $store_info->{timestamp}) |
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); |
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} |
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} |
195
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196
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sub notify_subscribe |
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{ |
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my ($self, $data) = @_; |
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200
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# Global |
201
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my $h = $self->{statistics}; |
202
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$h->{subscriptions}++; |
203
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204
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# Per-queue |
205
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my $stats = $self->get_destination($data); |
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$stats->{subscriptions}++; |
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} |
208
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209
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sub notify_unsubscribe |
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{ |
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my ($self, $data) = @_; |
212
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213
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# Global |
214
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my $h = $self->{statistics}; |
215
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$h->{subscriptions}--; |
216
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217
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# Per-queue |
218
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my $stats = $self->get_destination($data); |
219
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$stats->{subscriptions}--; |
220
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} |
221
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222
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sub notify_pump {} |
223
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224
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1; |
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226
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__END__ |
227
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228
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=head1 NAME |
229
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230
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POE::Component::MessageQueue::Statistics - Gather MQ Usage Statistics |
231
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232
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=head1 SYNOPSIS |
233
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234
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my $statistics = POE::Component::MessageQueue::Statistics->new(); |
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$mq->register( $statistics ); |
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=head1 DESCRIPTION |
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POE::Component::MessageQueue::Statistics is a simple observer that receives |
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events from the main POE::Component::MessageQueue object to collect usage |
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statistics. |
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By itself it will only *gather* statistics, and will not output anything. |
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To enable outputs, you need to create a separate Publish object: |
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POE::Component::MessageQueue::Statistics::Publish::YAML->new( |
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output => \*STDERR, |
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statistics => $statistics |
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); |
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Please refer to L<POE::Component::MessageQueue::Statistics::Publish> for details |
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on how to enable output |
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=head1 SEE ALSO |
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L<POE::Component::MessageQueue::Statistics::Publish>, |
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L<POE::Component::MessageQueue::Statistics::Publish::YAML> |
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=head1 AUTHOR |
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Daisuke Maki E<lt>daisuke@endeworks.jpE<gt> |
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=cut |