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package RabbitMQ::Consumer::Batcher; |
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2778
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use Moose; |
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use namespace::autoclean; |
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use Try::Tiny; |
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use RabbitMQ::Consumer::Batcher::Item; |
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use RabbitMQ::Consumer::Batcher::Message; |
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our $VERSION = '0.1.1'; |
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=head1 NAME |
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RabbitMQ::Consumer::Batcher - batch consumer of RMQ messages |
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=head1 SYNOPSIS |
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use AnyEvent; |
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use AnyEvent::RabbitMQ::PubSub; |
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use AnyEvent::RabbitMQ::PubSub::Consumer; |
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use RabbitMQ::Consumer::Batcher; |
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my ($rmq_connection, $channel) = AnyEvent::RabbitMQ::PubSub::connect( |
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host => 'localhost', |
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port => 5672, |
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user => 'guest', |
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pass => 'guest', |
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vhost => '/', |
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); |
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my $exchange = { |
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exchange => 'my_test_exchange', |
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type => 'topic', |
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durable => 0, |
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auto_delete => 1, |
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}; |
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my $queue = { |
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queue => 'my_test_queue'; |
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auto_delete => 1, |
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}; |
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my $routing_key = 'my_rk'; |
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my $consumer = AnyEvent::RabbitMQ::PubSub::Consumer->new( |
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channel => $channel, |
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exchange => $exchange, |
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queue => $queue, |
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routing_key => $routing_key, |
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); |
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$consumer->init(); #declares channel, queue and binding |
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53
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my $batcher = RabbitMQ::Consumer::Batcher->new( |
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batch_size => $consumer->prefetch_count, |
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on_add => sub { |
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my ($batcher, $msg) = @_; |
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58
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my $decode_payload = decode_payload($msg->{header}, $msg->{body}->payload()); |
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return $decode_payload; |
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}, |
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on_add_catch => sub { |
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my ($batcher, $msg, $exception) = @_; |
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64
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if ($exception->$_isa('failure') && $exception->{payload}{stats_key}) { |
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$stats->increment($exception->{payload}{stats_key}); |
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} |
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if ($exception->$_isa('failure') && $exception->{payload}{reject}) { |
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$batcher->reject($msg); |
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$log->error("consume failed - reject: $exception\n".$msg->{body}->payload()); |
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} |
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else { |
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$batcher->reject_and_republish($msg); |
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$log->error("consume failed - republish: $exception"); |
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} |
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}, |
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on_batch_complete => sub { |
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my ($batcher, $batch) = @_; |
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path(...)->spew(join "\t", map { $_->value() } @$batch); |
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}, |
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on_batch_complete_catch => sub { |
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my ($batcher, $batch, $exception) = @_; |
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85
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$log->error("save messages to file failed: $exception"); |
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} |
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); |
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89
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my $cv = AnyEvent->condvar(); |
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$consumer->consume($cv, $batcher->consume_code())->then(sub { |
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say 'Consumer was started...'; |
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}); |
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94
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=head1 DESCRIPTION |
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96
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If you need batch of messages from RabbitMQ - this module is for you. |
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98
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This module work well with L<AnyEvent::RabbitMQ::PubSub::Consumer> |
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100
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Idea of this module is - in I<on_add> phase is message validate and if is corrupted, can be reject. |
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In I<on_batch_complete> phase we manipulated with message which we don't miss. |
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If is some problem in this phase, messages are republished.. |
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104
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=head1 METHODS |
105
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106
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=head2 new(%attributes) |
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108
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=head3 attributes |
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110
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=head4 batch_size |
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112
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Max batch size (trigger for C<on_batch_complete>) |
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114
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C<batch_size> must be C<prefetch_count> or bigger! |
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116
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this is required attribute |
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118
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=cut |
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120
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has 'batch_size' => ( |
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is => 'ro', |
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isa => 'Int', |
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required => 1, |
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); |
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126
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=head4 on_add |
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128
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this callback are called after consume one single message. Is usefully for decoding for example. |
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130
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return value of callback are used as value in batch item (L<RabbitMQ::Consumer::Batcher::Item>) |
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132
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default behaviour is payload of message is used as item in batch |
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134
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return sub { |
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my($batcher, $msg) = @_; |
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return $msg->{body}->payload() |
137
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} |
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139
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parameters which are give to callback: |
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141
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=over |
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143
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=item C<$batcher> |
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145
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self instance of L<RabbitMQ::Consumer::Batcher> |
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147
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=item C<$msg> |
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149
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consumed message L<AnyEvent::RabbitMQ::Channel/on_consume> |
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151
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=back |
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153
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=cut |
154
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155
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has 'on_add' => ( |
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is => 'ro', |
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isa => 'CodeRef', |
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default => sub { |
159
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return sub { |
160
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my ($batcher, $msg) = @_; |
161
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return $msg->{body}->payload(); |
162
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} |
163
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} |
164
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); |
165
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166
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=head4 on_add_catch |
167
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168
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this callback are called if C<on_add> callback throws |
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170
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default behaviour do reject message |
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172
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return sub { |
173
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my ($batcher, $msg, $exception) = @_; |
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175
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$batcher->reject($msg); |
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} |
177
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178
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parameters which are give to callback: |
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180
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=over |
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182
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=item C<$batcher> |
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184
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self instance of L<RabbitMQ::Consumer::Batcher> |
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186
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=item C<$msg> |
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188
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consumed message L<AnyEvent::RabbitMQ::Channel/on_consume> |
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190
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=item C<$exception> |
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192
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exception string |
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194
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=back |
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196
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=cut |
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198
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has 'on_add_catch' => ( |
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is => 'ro', |
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isa => 'CodeRef', |
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default => sub { |
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return sub { |
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my ($batcher, $msg, $exception) = @_; |
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205
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$batcher->reject($msg); |
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} |
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} |
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); |
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210
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=head4 on_batch_complete |
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212
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this callback is triggered if batch is complete (count of items is C<batch_size>) |
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214
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this is required attribute |
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216
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parameters which are give to callback: |
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218
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219
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=over |
220
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221
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=item C<$batcher> |
222
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223
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self instance of L<RabbitMQ::Consumer::Batcher> |
224
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225
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=item C<$batch> |
226
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227
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batch is I<ArrayRef> of L<RabbitMQ::Consumer::Batcher::Item> |
228
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229
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=back |
230
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231
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example C<on_batch_complete> I<CodeRef> (item I<value> are I<string>s) |
232
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233
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return sub { |
234
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my($batcher, $batch) = @_; |
235
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236
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print join "\n", map { $_->value() } @$batch; |
237
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$batcher->ack($batch); |
238
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} |
239
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240
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=cut |
241
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242
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has 'on_batch_complete' => ( |
243
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is => 'ro', |
244
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isa => 'CodeRef', |
245
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required => 1, |
246
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); |
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248
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=head4 on_batch_complete_catch |
249
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250
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this callback are called if C<on_batch_complete> callback throws |
251
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252
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after this callback is batch I<reject_and_republish> |
253
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254
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If you need change I<reject_and_republish> of batch to (for example) I<reject>, you can do: |
255
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256
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return sub { |
257
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my ($batcher, $batch, $exception) = @_; |
258
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259
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$batcher->reject($batch); |
260
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#batch_clean must be called, |
261
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#because reject_and_republish after this exception handler will be called to... |
262
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$batcher->batch_clean(); |
263
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} |
264
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265
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parameters which are give to callback: |
266
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267
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=over |
268
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269
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=item C<$batcher> |
270
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271
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self instance of L<RabbitMQ::Consumer::Batcher> |
272
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273
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=item C<$batch> |
274
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275
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I<ArrayRef> of L<RabbitMQ::Consumer::Batcher::Item>s |
276
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277
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=item C<$exception> |
278
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279
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exception string |
280
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281
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=back |
282
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283
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=cut |
284
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285
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has 'on_batch_complete_catch' => ( |
286
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is => 'ro', |
287
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isa => 'Maybe[CodeRef]', |
288
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); |
289
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290
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has 'batch' => ( |
291
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is => 'ro', |
292
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isa => 'ArrayRef[RabbitMQ::Consumer::Batcher::Item]', |
293
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default => sub { [] }, |
294
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traits => ['Array'], |
295
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handles => { |
296
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add_to_batch => 'push', |
297
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clean_batch => 'clear', |
298
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count_of_batch_items => 'count', |
299
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batch_as_array => 'elements', |
300
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} |
301
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); |
302
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303
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|
=head2 consume_code() |
304
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305
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|
return C<sub{}> for handling messages in C<consume> method of L<AnyEvent::RabbitMQ::PubSub::Consumer> |
306
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307
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|
$consumer->consume($cv, $batcher->consume_code()); |
308
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309
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|
=cut |
310
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311
|
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|
sub consume_code { |
312
|
2
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2
|
1
|
1314
|
my ($self) = @_; |
313
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314
|
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|
return sub { |
315
|
12
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|
|
12
|
|
3028
|
my ($consumer, $msg) = @_; |
316
|
|
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317
|
12
|
|
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|
|
451
|
my $message = RabbitMQ::Consumer::Batcher::Message->new( |
318
|
|
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|
|
%$msg, |
319
|
|
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|
|
consumer => $consumer, |
320
|
|
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|
); |
321
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322
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|
try { |
323
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|
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324
|
12
|
|
|
|
|
965
|
my $value = $self->on_add->($self, $message); |
325
|
|
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|
326
|
7
|
|
|
|
|
775
|
$self->add_to_batch( |
327
|
|
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|
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|
|
RabbitMQ::Consumer::Batcher::Item->new( |
328
|
|
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|
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|
|
value => $value, |
329
|
|
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|
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|
|
msg => $message, |
330
|
|
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|
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|
|
) |
331
|
|
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|
|
); |
332
|
|
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|
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|
|
} |
333
|
|
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|
|
catch { |
334
|
5
|
|
|
|
|
543
|
$self->on_add_catch->($self, $message, $_); |
335
|
12
|
|
|
|
|
99
|
}; |
336
|
|
|
|
|
|
|
|
337
|
12
|
100
|
|
|
|
3454
|
if ($self->count_of_batch_items() >= $self->batch_size) { |
338
|
|
|
|
|
|
|
try { |
339
|
2
|
|
|
|
|
247
|
$self->on_batch_complete->($self, $self->batch); |
340
|
1
|
|
|
|
|
706
|
$self->ack($self->batch_as_array()); |
341
|
|
|
|
|
|
|
} |
342
|
|
|
|
|
|
|
catch { |
343
|
1
|
|
|
|
|
20
|
my $exception = $_; |
344
|
1
|
50
|
|
|
|
37
|
if (defined $self->on_batch_complete_catch) { |
345
|
1
|
|
|
|
|
26
|
$self->on_batch_complete_catch->($self, $self->batch, $exception); |
346
|
|
|
|
|
|
|
} |
347
|
1
|
|
|
|
|
562
|
$self->reject_and_republish($self->batch_as_array()); |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
finally { |
350
|
2
|
|
|
|
|
1056
|
$self->clean_batch(); |
351
|
2
|
|
|
|
|
23
|
}; |
352
|
|
|
|
|
|
|
} |
353
|
|
|
|
|
|
|
} |
354
|
2
|
|
|
|
|
19
|
} |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
=head2 ack(@items) |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
ack all C<@items> (instances of L<RabbitMQ::Consumer::Batcher::Item> or L<RabbitMQ::Consumer::Batcher::Message>) |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
=cut |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
sub ack { |
363
|
1
|
|
|
1
|
1
|
4
|
my ($self, @items) = @_; |
364
|
|
|
|
|
|
|
|
365
|
1
|
|
|
|
|
3
|
_consumer('ack', @items); |
366
|
|
|
|
|
|
|
} |
367
|
|
|
|
|
|
|
|
368
|
|
|
|
|
|
|
=head2 reject(@items) |
369
|
|
|
|
|
|
|
|
370
|
|
|
|
|
|
|
reject all C<@items> (instances of L<RabbitMQ::Consumer::Batcher::Item> or L<RabbitMQ::Consumer::Batcher::Message>) |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
=cut |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
sub reject { |
375
|
5
|
|
|
5
|
1
|
14
|
my ($self, @items) = @_; |
376
|
|
|
|
|
|
|
|
377
|
5
|
|
|
|
|
26
|
_consumer('reject', @items); |
378
|
|
|
|
|
|
|
} |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
=head2 reject_and_republish(@items) |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
reject and republish all C<@items> (instances of L<RabbitMQ::Consumer::Batcher::Item> or L<RabbitMQ::Consumer::Batcher::Message>) |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
=cut |
385
|
|
|
|
|
|
|
|
386
|
|
|
|
|
|
|
sub reject_and_republish { |
387
|
1
|
|
|
1
|
1
|
3
|
my ($self, @items) = @_; |
388
|
|
|
|
|
|
|
|
389
|
1
|
|
|
|
|
4
|
_consumer('reject_and_republish', @items); |
390
|
|
|
|
|
|
|
} |
391
|
|
|
|
|
|
|
|
392
|
|
|
|
|
|
|
sub _consumer { |
393
|
7
|
|
|
7
|
|
18
|
my ($action, @items) = @_; |
394
|
|
|
|
|
|
|
|
395
|
7
|
|
|
|
|
21
|
foreach my $item (@items) { |
396
|
12
|
100
|
|
|
|
2578
|
if ($item->isa('RabbitMQ::Consumer::Batcher::Item')) { |
|
|
50
|
|
|
|
|
|
397
|
7
|
|
|
|
|
223
|
$item->msg->consumer->$action($item->msg); |
398
|
|
|
|
|
|
|
} |
399
|
|
|
|
|
|
|
elsif ($item->isa('RabbitMQ::Consumer::Batcher::Message')) { |
400
|
5
|
|
|
|
|
144
|
$item->consumer->$action($item); |
401
|
|
|
|
|
|
|
} |
402
|
|
|
|
|
|
|
else { |
403
|
0
|
|
|
|
|
|
die 'Unknown object (without consumer)'; |
404
|
|
|
|
|
|
|
} |
405
|
|
|
|
|
|
|
} |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
} |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
=head1 contributing |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
for dependency use L<cpanfile>... |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
for resolve dependency use L<Carton> (or L<Carmel> - is more experimental) |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
carton install |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
for run test use C<minil test> |
418
|
|
|
|
|
|
|
|
419
|
|
|
|
|
|
|
carton exec minil test |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
if you don't have perl environment, is best way use docker |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
docker run -it -v $PWD:/tmp/work -w /tmp/work avastsoftware/perl-extended carton install |
425
|
|
|
|
|
|
|
docker run -it -v $PWD:/tmp/work -w /tmp/work avastsoftware/perl-extended carton exec minil test |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
=head2 warning |
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
docker run default as root, all files which will be make in docker will be have root rights |
430
|
|
|
|
|
|
|
|
431
|
|
|
|
|
|
|
one solution is change rights in docker |
432
|
|
|
|
|
|
|
|
433
|
|
|
|
|
|
|
docker run -it -v $PWD:/tmp/work -w /tmp/work avastsoftware/perl-extended bash -c "carton install; chmod -R 0777 ." |
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
or after docker command (but you must have root rights) |
436
|
|
|
|
|
|
|
|
437
|
|
|
|
|
|
|
=head1 LICENSE |
438
|
|
|
|
|
|
|
|
439
|
|
|
|
|
|
|
Copyright (C) Avast Software. |
440
|
|
|
|
|
|
|
|
441
|
|
|
|
|
|
|
This library is free software; you can redistribute it and/or modify |
442
|
|
|
|
|
|
|
it under the same terms as Perl itself. |
443
|
|
|
|
|
|
|
|
444
|
|
|
|
|
|
|
=head1 AUTHOR |
445
|
|
|
|
|
|
|
|
446
|
|
|
|
|
|
|
Jan Seidl E<lt>seidl@avast.comE<gt> |
447
|
|
|
|
|
|
|
|
448
|
|
|
|
|
|
|
=cut |
449
|
|
|
|
|
|
|
|
450
|
|
|
|
|
|
|
__PACKAGE__->meta->make_immutable(); |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
1; |