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              #!/usr/bin/perl  | 
            
            
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              use strict;  | 
            
            
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              use warnings;  | 
            
            
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              use Koha::Caches;  | 
            
            
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              use Test::More tests => 1;  | 
            
            
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              use Cache::Memcached::Fast;  | 
            
            
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              use IO::Select;  | 
            
            
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              my $cache = Koha::Caches->get_instance('syspref'); | 
            
            
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               | 
            
            
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              my $map = { | 
            
            
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                  'syspref_timeout' => '1d',  | 
            
            
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                  'syspref_independentbranches' => '0',  | 
            
            
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                  'syspref_version' => '18.1101000'  | 
            
            
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              };  | 
            
            
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              #Set keys for test  | 
            
            
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              foreach my $key ( keys %$map ){ | 
            
            
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                  $cache->set_in_cache($key,$map->{$key}); | 
            
            
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              }  | 
            
            
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               | 
            
            
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              my @children = ();  | 
            
            
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              my $select = IO::Select->new();  | 
            
            
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              for ( 1..10 ){ | 
            
            
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                  my ($read_child,$write_parent);  | 
            
            
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                  pipe($read_child,$write_parent);  | 
            
            
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                  my $pid = fork;  | 
            
            
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                  if ($pid == 0){ | 
            
            
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                      close($read_child);  | 
            
            
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                      my $a_problems = check_cache({ | 
            
            
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                          keys => ["syspref_version","syspref_timeout","syspref_independentbranches"],  | 
            
            
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                          iterations => int(rand(50)),  | 
            
            
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                      });  | 
            
            
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                      my $b_problems = check_cache({ | 
            
            
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                          keys => ["syspref_version","syspref_timeout","syspref_independentbranches"],  | 
            
            
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                          iterations => int(rand(50)),  | 
            
            
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                      });  | 
            
            
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                      my $c_problems = check_cache({ | 
            
            
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                          keys => ["syspref_version","syspref_timeout","syspref_independentbranches"],  | 
            
            
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                          iterations => int(rand(50)),  | 
            
            
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                      });  | 
            
            
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                      my $total_problems = $a_problems + $b_problems + $c_problems;  | 
            
            
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               | 
            
            
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                      print $write_parent "$total_problems\n";  | 
            
            
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                      close($write_parent);  | 
            
            
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                      exit;  | 
            
            
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                  }  | 
            
            
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                  else { | 
            
            
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                      close($write_parent);  | 
            
            
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                      $select->add($read_child);  | 
            
            
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                      push(@children,$pid);  | 
            
            
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                  }  | 
            
            
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              }  | 
            
            
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               | 
            
            
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              my $problems = 0;  | 
            
            
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              while ( my @ready = $select->can_read(.25) ){ | 
            
            
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                  foreach my $fh (@ready){ | 
            
            
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                      my $msg = <$fh>;  | 
            
            
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                      if ($msg){ | 
            
            
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                          chomp($msg);  | 
            
            
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                          $problems += $msg;  | 
            
            
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                          $select->remove($fh);  | 
            
            
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                          $fh->close;  | 
            
            
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                      }  | 
            
            
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                  }  | 
            
            
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              }  | 
            
            
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               | 
            
            
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              foreach my $child (@children){ | 
            
            
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                  waitpid($child,0);  | 
            
            
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              }  | 
            
            
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              warn "Finished $problems\n";  | 
            
            
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              is($problems,0,"There should be no problems reported.");  | 
            
            
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               | 
            
            
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              sub check_cache { | 
            
            
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                  my ($args) = @_;  | 
            
            
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                  my $problems = 0;  | 
            
            
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                  my $keys = $args->{keys}; | 
            
            
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                  my $iterations = $args->{iterations}; | 
            
            
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                  if ($keys && defined $iterations){ | 
            
            
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                      $iterations++;  | 
            
            
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                      for ( 1 .. $iterations ){ | 
            
            
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                          my $index = int(rand(3));  | 
            
            
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                          my $key = $keys->[$index];  | 
            
            
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                          my $cached_value = $cache->get_from_cache($key);  | 
            
            
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                          Koha::Caches->flush_L1_caches();  | 
            
            
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                          my $problem = "";  | 
            
            
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                          if ( ! defined $cached_value ){ | 
            
            
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                              $cached_value = 'NULL';  | 
            
            
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                              $problem = 1;  | 
            
            
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                          }  | 
            
            
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                          elsif ($cached_value ne $map->{$key}){ | 
            
            
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                              $problem = 1;  | 
            
            
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                          }  | 
            
            
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                          if ($problem){ | 
            
            
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                              $problems++;  | 
            
            
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                              warn "Process:$$\t Key: $key\t Correct value: $map->{$key}\t Cached value: $cached_value\n"; | 
            
            
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                          }  | 
            
            
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                      }  | 
            
            
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                  }  | 
            
            
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                  return $problems;  | 
            
            
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              }  |